Merge tag 'linux-kselftest-kunit-next-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest

Pull KUnit updates from Shuah Khan:
"Several enhancements, fixes, clean-ups, documentation updates,
improvements to logging and KTAP compliance of KUnit test output:

- log numbers in decimal and hex

- parse KTAP compliant test output

- allow conditionally exposing static symbols to tests when KUNIT is
enabled

- make static symbols visible during kunit testing

- clean-ups to remove unused structure definition"

* tag 'linux-kselftest-kunit-next-6.2-rc1' of git://git.kernel.org/pub/scm/linux/kernel/git/shuah/linux-kselftest: (29 commits)
Documentation: dev-tools: Clarify requirements for result description
apparmor: test: make static symbols visible during kunit testing
kunit: add macro to allow conditionally exposing static symbols to tests
kunit: tool: make parser preserve whitespace when printing test log
Documentation: kunit: Fix "How Do I Use This" / "Next Steps" sections
kunit: tool: don't include KTAP headers and the like in the test log
kunit: improve KTAP compliance of KUnit test output
kunit: tool: parse KTAP compliant test output
mm: slub: test: Use the kunit_get_current_test() function
kunit: Use the static key when retrieving the current test
kunit: Provide a static key to check if KUnit is actively running tests
kunit: tool: make --json do nothing if --raw_ouput is set
kunit: tool: tweak error message when no KTAP found
kunit: remove KUNIT_INIT_MEM_ASSERTION macro
Documentation: kunit: Remove redundant 'tips.rst' page
Documentation: KUnit: reword description of assertions
Documentation: KUnit: make usage.rst a superset of tips.rst, remove duplication
kunit: eliminate KUNIT_INIT_*_ASSERT_STRUCT macros
kunit: tool: remove redundant file.close() call in unit test
kunit: tool: unit tests all check parser errors, standardize formatting a bit
...

Documentation/dev-tools/ktap.rst

···
 subtest within the same test at the same nesting level.
 
 The description is a description of the test, generally the name of
-the test, and can be any string of words (can't include #). The
-description is optional, but recommended.
+the test, and can be any string of characters other than # or a
+newline.  The description is optional, but recommended.
 
 The directive and any diagnostic data is optional. If either are present, they
 must follow a hash sign, "#".

Documentation/dev-tools/kunit/architecture.rst

···
 KUnit Architecture
 ==================
 
-The KUnit architecture can be divided into two parts:
+The KUnit architecture is divided into two parts:
 
 - `In-Kernel Testing Framework`_
-- `kunit_tool (Command Line Test Harness)`_
+- `kunit_tool (Command-line Test Harness)`_
 
 In-Kernel Testing Framework
 ===========================
 
 The kernel testing library supports KUnit tests written in C using
-KUnit. KUnit tests are kernel code. KUnit does several things:
+KUnit. These KUnit tests are kernel code. KUnit performs the following
+tasks:
 
 - Organizes tests
 - Reports test results
···
 Test Cases
 ----------
 
-The fundamental unit in KUnit is the test case. The KUnit test cases are
-grouped into KUnit suites. A KUnit test case is a function with type
-signature ``void (*)(struct kunit *test)``.
-These test case functions are wrapped in a struct called
-struct kunit_case.
+The test case is the fundamental unit in KUnit. KUnit test cases are organised
+into suites. A KUnit test case is a function with type signature
+``void (*)(struct kunit *test)``. These test case functions are wrapped in a
+struct called struct kunit_case.
 
 .. note:
 	``generate_params`` is optional for non-parameterized tests.
 
-Each KUnit test case gets a ``struct kunit`` context
-object passed to it that tracks a running test. The KUnit assertion
-macros and other KUnit utilities use the ``struct kunit`` context
-object. As an exception, there are two fields:
+Each KUnit test case receives a ``struct kunit`` context object that tracks a
+running test. The KUnit assertion macros and other KUnit utilities use the
+``struct kunit`` context object. As an exception, there are two fields:
 
 - ``->priv``: The setup functions can use it to store arbitrary test
   user data.
···
 
 The KUnit executor can list and run built-in KUnit tests on boot.
 The Test suites are stored in a linker section
-called ``.kunit_test_suites``. For code, see:
-https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/asm-generic/vmlinux.lds.h?h=v5.15#n945.
+called ``.kunit_test_suites``. For the code, see ``KUNIT_TABLE()`` macro
+definition in
+`include/asm-generic/vmlinux.lds.h <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/include/asm-generic/vmlinux.lds.h?h=v6.0#n950>`_.
 The linker section consists of an array of pointers to
 ``struct kunit_suite``, and is populated by the ``kunit_test_suites()``
-macro. To run all tests compiled into the kernel, the KUnit executor
-iterates over the linker section array.
+macro. The KUnit executor iterates over the linker section array in order to
+run all the tests that are compiled into the kernel.
 
 .. kernel-figure:: kunit_suitememorydiagram.svg
 	:alt:	KUnit Suite Memory
···
 	KUnit Suite Memory Diagram
 
 On the kernel boot, the KUnit executor uses the start and end addresses
-of this section to iterate over and run all tests. For code, see:
-https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/kunit/executor.c
-
+of this section to iterate over and run all tests. For the implementation of the
+executor, see
+`lib/kunit/executor.c <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/kunit/executor.c>`_.
 When built as a module, the ``kunit_test_suites()`` macro defines a
 ``module_init()`` function, which runs all the tests in the compilation
 unit instead of utilizing the executor.
 
 In KUnit tests, some error classes do not affect other tests
 or parts of the kernel, each KUnit case executes in a separate thread
-context. For code, see:
-https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/kunit/try-catch.c?h=v5.15#n58
+context. See the ``kunit_try_catch_run()`` function in
+`lib/kunit/try-catch.c <https://git.kernel.org/pub/scm/linux/kernel/git/torvalds/linux.git/tree/lib/kunit/try-catch.c?h=v5.15#n58>`_.
 
 Assertion Macros
 ----------------
···
 
 - ``{EXPECT|ASSERT}`` determines whether the check is an assertion or an
   expectation.
+  In the event of a failure, the testing flow differs as follows:
 
-	- For an expectation, if the check fails, marks the test as failed
-	  and logs the failure.
+	- For expectations, the test is marked as failed and the failure is logged.
 
-	- An assertion, on failure, causes the test case to terminate
-	  immediately.
+	- Failing assertions, on the other hand, result in the test case being
+	  terminated immediately.
 
-		- Assertions call function:
+		- Assertions call the function:
 		  ``void __noreturn kunit_abort(struct kunit *)``.
 
-		- ``kunit_abort`` calls function:
+		- ``kunit_abort`` calls the function:
 		  ``void __noreturn kunit_try_catch_throw(struct kunit_try_catch *try_catch)``.
 
-		- ``kunit_try_catch_throw`` calls function:
+		- ``kunit_try_catch_throw`` calls the function:
 		  ``void kthread_complete_and_exit(struct completion *, long) __noreturn;``
 		  and terminates the special thread context.
 
 - ``<op>`` denotes a check with options: ``TRUE`` (supplied property
-  has the boolean value “true”), ``EQ`` (two supplied properties are
+  has the boolean value "true"), ``EQ`` (two supplied properties are
   equal), ``NOT_ERR_OR_NULL`` (supplied pointer is not null and does not
-  contain an “err” value).
+  contain an "err" value).
 
 - ``[_MSG]`` prints a custom message on failure.
 
 Test Result Reporting
 ---------------------
-KUnit prints test results in KTAP format. KTAP is based on TAP14, see:
-https://github.com/isaacs/testanything.github.io/blob/tap14/tap-version-14-specification.md.
-KTAP (yet to be standardized format) works with KUnit and Kselftest.
-The KUnit executor prints KTAP results to dmesg, and debugfs
-(if configured).
+KUnit prints the test results in KTAP format. KTAP is based on TAP14, see
+Documentation/dev-tools/ktap.rst.
+KTAP works with KUnit and Kselftest. The KUnit executor prints KTAP results to
+dmesg, and debugfs (if configured).
 
 Parameterized Tests
 -------------------
···
 parameters. The test is invoked multiple times, once for each parameter
 value and the parameter is stored in the ``param_value`` field.
 The test case includes a KUNIT_CASE_PARAM() macro that accepts a
-generator function.
-The generator function is passed the previous parameter and returns the next
-parameter. It also provides a macro to generate common-case generators based on
-arrays.
+generator function. The generator function is passed the previous parameter
+and returns the next parameter. It also includes a macro for generating
+array-based common-case generators.
 
-kunit_tool (Command Line Test Harness)
+kunit_tool (Command-line Test Harness)
 ======================================
 
-kunit_tool is a Python script ``(tools/testing/kunit/kunit.py)``
-that can be used to configure, build, exec, parse and run (runs other
-commands in order) test results. You can either run KUnit tests using
-kunit_tool or can include KUnit in kernel and parse manually.
+``kunit_tool`` is a Python script, found in ``tools/testing/kunit/kunit.py``. It
+is used to configure, build, execute, parse test results and run all of the
+previous commands in correct order (i.e., configure, build, execute and parse).
+You have two options for running KUnit tests: either build the kernel with KUnit
+enabled and manually parse the results (see
+Documentation/dev-tools/kunit/run_manual.rst) or use ``kunit_tool``
+(see Documentation/dev-tools/kunit/run_wrapper.rst).
 
 - ``configure`` command generates the kernel ``.config`` from a
   ``.kunitconfig`` file (and any architecture-specific options).
-  For some architectures, additional config options are specified in the
-  ``qemu_config`` Python script
-  (For example: ``tools/testing/kunit/qemu_configs/powerpc.py``).
+  The Python scripts available in ``qemu_configs`` folder
+  (for example, ``tools/testing/kunit/qemu configs/powerpc.py``) contains
+  additional configuration options for specific architectures.
   It parses both the existing ``.config`` and the ``.kunitconfig`` files
-  and ensures that ``.config`` is a superset of ``.kunitconfig``.
-  If this is not the case, it will combine the two and run
-  ``make olddefconfig`` to regenerate the ``.config`` file. It then
-  verifies that ``.config`` is now a superset. This checks if all
-  Kconfig dependencies are correctly specified in ``.kunitconfig``.
-  ``kunit_config.py`` includes the parsing Kconfigs code. The code which
-  runs ``make olddefconfig`` is a part of ``kunit_kernel.py``. You can
-  invoke this command via: ``./tools/testing/kunit/kunit.py config`` and
+  to ensure that ``.config`` is a superset of ``.kunitconfig``.
+  If not, it will combine the two and run ``make olddefconfig`` to regenerate
+  the ``.config`` file. It then checks to see if ``.config`` has become a superset.
+  This verifies that all the Kconfig dependencies are correctly specified in the
+  file ``.kunitconfig``. The ``kunit_config.py`` script contains the code for parsing
+  Kconfigs. The code which runs ``make olddefconfig`` is part of the
+  ``kunit_kernel.py`` script. You can invoke this command through:
+  ``./tools/testing/kunit/kunit.py config`` and
   generate a ``.config`` file.
 - ``build`` runs ``make`` on the kernel tree with required options
   (depends on the architecture and some options, for example: build_dir)
···
   To build a KUnit kernel from the current ``.config``, you can use the
   ``build`` argument: ``./tools/testing/kunit/kunit.py build``.
 - ``exec`` command executes kernel results either directly (using
-  User-mode Linux configuration), or via an emulator such
-  as QEMU. It reads results from the log via standard
+  User-mode Linux configuration), or through an emulator such
+  as QEMU. It reads results from the log using standard
   output (stdout), and passes them to ``parse`` to be parsed.
   If you already have built a kernel with built-in KUnit tests,
   you can run the kernel and display the test results with the ``exec``

Documentation/dev-tools/kunit/index.rst

···
 	api/index
 	style
 	faq
-	tips
 	running_tips
 
 This section details the kernel unit testing framework.
···
 How do I use it?
 ================
 
-*   Documentation/dev-tools/kunit/start.rst - for KUnit new users.
-*   Documentation/dev-tools/kunit/architecture.rst - KUnit architecture.
-*   Documentation/dev-tools/kunit/run_wrapper.rst - run kunit_tool.
-*   Documentation/dev-tools/kunit/run_manual.rst - run tests without kunit_tool.
-*   Documentation/dev-tools/kunit/usage.rst - write tests.
-*   Documentation/dev-tools/kunit/tips.rst - best practices with
-    examples.
-*   Documentation/dev-tools/kunit/api/index.rst - KUnit APIs
-    used for testing.
-*   Documentation/dev-tools/kunit/faq.rst - KUnit common questions and
-    answers.
+You can find a step-by-step guide to writing and running KUnit tests in
+Documentation/dev-tools/kunit/start.rst
+
+Alternatively, feel free to look through the rest of the KUnit documentation,
+or to experiment with tools/testing/kunit/kunit.py and the example test under
+lib/kunit/kunit-example-test.c
+
+Happy testing!

Documentation/dev-tools/kunit/start.rst

···
 Next Steps
 ==========
 
-*   Documentation/dev-tools/kunit/architecture.rst - KUnit architecture.
-*   Documentation/dev-tools/kunit/run_wrapper.rst - run kunit_tool.
-*   Documentation/dev-tools/kunit/run_manual.rst - run tests without kunit_tool.
-*   Documentation/dev-tools/kunit/usage.rst - write tests.
-*   Documentation/dev-tools/kunit/tips.rst - best practices with
-    examples.
-*   Documentation/dev-tools/kunit/api/index.rst - KUnit APIs
-    used for testing.
-*   Documentation/dev-tools/kunit/faq.rst - KUnit common questions and
-    answers.
+If you're interested in using some of the more advanced features of kunit.py,
+take a look at Documentation/dev-tools/kunit/run_wrapper.rst
+
+If you'd like to run tests without using kunit.py, check out
+Documentation/dev-tools/kunit/run_manual.rst
+
+For more information on writing KUnit tests (including some common techniques
+for testing different things), see Documentation/dev-tools/kunit/usage.rst

Documentation/dev-tools/kunit/tips.rst

···
-.. SPDX-License-Identifier: GPL-2.0
-
-============================
-Tips For Writing KUnit Tests
-============================
-
-Exiting early on failed expectations
-------------------------------------
-
-``KUNIT_EXPECT_EQ`` and friends will mark the test as failed and continue
-execution.  In some cases, it's unsafe to continue and you can use the
-``KUNIT_ASSERT`` variant to exit on failure.
-
-.. code-block:: c
-
-	void example_test_user_alloc_function(struct kunit *test)
-	{
-		void *object = alloc_some_object_for_me();
-
-		/* Make sure we got a valid pointer back. */
-		KUNIT_ASSERT_NOT_ERR_OR_NULL(test, object);
-		do_something_with_object(object);
-	}
-
-Allocating memory
------------------
-
-Where you would use ``kzalloc``, you should prefer ``kunit_kzalloc`` instead.
-KUnit will ensure the memory is freed once the test completes.
-
-This is particularly useful since it lets you use the ``KUNIT_ASSERT_EQ``
-macros to exit early from a test without having to worry about remembering to
-call ``kfree``.
-
-Example:
-
-.. code-block:: c
-
-	void example_test_allocation(struct kunit *test)
-	{
-		char *buffer = kunit_kzalloc(test, 16, GFP_KERNEL);
-		/* Ensure allocation succeeded. */
-		KUNIT_ASSERT_NOT_ERR_OR_NULL(test, buffer);
-
-		KUNIT_ASSERT_STREQ(test, buffer, "");
-	}
-
-
-Testing static functions
-------------------------
-
-If you don't want to expose functions or variables just for testing, one option
-is to conditionally ``#include`` the test file at the end of your .c file, e.g.
-
-.. code-block:: c
-
-	/* In my_file.c */
-
-	static int do_interesting_thing();
-
-	#ifdef CONFIG_MY_KUNIT_TEST
-	#include "my_kunit_test.c"
-	#endif
-
-Injecting test-only code
-------------------------
-
-Similarly to the above, it can be useful to add test-specific logic.
-
-.. code-block:: c
-
-	/* In my_file.h */
-
-	#ifdef CONFIG_MY_KUNIT_TEST
-	/* Defined in my_kunit_test.c */
-	void test_only_hook(void);
-	#else
-	void test_only_hook(void) { }
-	#endif
-
-This test-only code can be made more useful by accessing the current kunit
-test, see below.
-
-Accessing the current test
---------------------------
-
-In some cases, you need to call test-only code from outside the test file, e.g.
-like in the example above or if you're providing a fake implementation of an
-ops struct.
-There is a ``kunit_test`` field in ``task_struct``, so you can access it via
-``current->kunit_test``.
-
-Here's a slightly in-depth example of how one could implement "mocking":
-
-.. code-block:: c
-
-	#include <linux/sched.h> /* for current */
-
-	struct test_data {
-		int foo_result;
-		int want_foo_called_with;
-	};
-
-	static int fake_foo(int arg)
-	{
-		struct kunit *test = current->kunit_test;
-		struct test_data *test_data = test->priv;
-
-		KUNIT_EXPECT_EQ(test, test_data->want_foo_called_with, arg);
-		return test_data->foo_result;
-	}
-
-	static void example_simple_test(struct kunit *test)
-	{
-		/* Assume priv is allocated in the suite's .init */
-		struct test_data *test_data = test->priv;
-
-		test_data->foo_result = 42;
-		test_data->want_foo_called_with = 1;
-
-		/* In a real test, we'd probably pass a pointer to fake_foo somewhere
-		 * like an ops struct, etc. instead of calling it directly. */
-		KUNIT_EXPECT_EQ(test, fake_foo(1), 42);
-	}
-
-
-Note: here we're able to get away with using ``test->priv``, but if you wanted
-something more flexible you could use a named ``kunit_resource``, see
-Documentation/dev-tools/kunit/api/test.rst.
-
-Failing the current test
-------------------------
-
-But sometimes, you might just want to fail the current test. In that case, we
-have ``kunit_fail_current_test(fmt, args...)`` which is defined in ``<kunit/test-bug.h>`` and
-doesn't require pulling in ``<kunit/test.h>``.
-
-E.g. say we had an option to enable some extra debug checks on some data structure:
-
-.. code-block:: c
-
-	#include <kunit/test-bug.h>
-
-	#ifdef CONFIG_EXTRA_DEBUG_CHECKS
-	static void validate_my_data(struct data *data)
-	{
-		if (is_valid(data))
-			return;
-
-		kunit_fail_current_test("data %p is invalid", data);
-
-		/* Normal, non-KUnit, error reporting code here. */
-	}
-	#else
-	static void my_debug_function(void) { }
-	#endif
-
-
-Customizing error messages
---------------------------
-
-Each of the ``KUNIT_EXPECT`` and ``KUNIT_ASSERT`` macros have a ``_MSG`` variant.
-These take a format string and arguments to provide additional context to the automatically generated error messages.
-
-.. code-block:: c
-
-	char some_str[41];
-	generate_sha1_hex_string(some_str);
-
-	/* Before. Not easy to tell why the test failed. */
-	KUNIT_EXPECT_EQ(test, strlen(some_str), 40);
-
-	/* After. Now we see the offending string. */
-	KUNIT_EXPECT_EQ_MSG(test, strlen(some_str), 40, "some_str='%s'", some_str);
-
-Alternatively, one can take full control over the error message by using ``KUNIT_FAIL()``, e.g.
-
-.. code-block:: c
-
-	/* Before */
-	KUNIT_EXPECT_EQ(test, some_setup_function(), 0);
-
-	/* After: full control over the failure message. */
-	if (some_setup_function())
-		KUNIT_FAIL(test, "Failed to setup thing for testing");
-
-Next Steps
-==========
-*   Optional: see the Documentation/dev-tools/kunit/usage.rst page for a more
-    in-depth explanation of KUnit.

Documentation/dev-tools/kunit/usage.rst

···
 			KUNIT_EXPECT_LE(test, a[i], a[i + 1]);
 	}
 
-In this example, the method under test should return pointer to a value. If the
-pointer returns null or an errno, we want to stop the test since the following
-expectation could crash the test case. `ASSERT_NOT_ERR_OR_NULL(...)` allows us
-to bail out of the test case if the appropriate conditions are not satisfied to
-complete the test.
+In this example, we need to be able to allocate an array to test the ``sort()``
+function. So we use ``KUNIT_ASSERT_NOT_ERR_OR_NULL()`` to abort the test if
+there's an allocation error.
+
+.. note::
+   In other test frameworks, ``ASSERT`` macros are often implemented by calling
+   ``return`` so they only work from the test function. In KUnit, we stop the
+   current kthread on failure, so you can call them from anywhere.
+
+Customizing error messages
+--------------------------
+
+Each of the ``KUNIT_EXPECT`` and ``KUNIT_ASSERT`` macros have a ``_MSG``
+variant.  These take a format string and arguments to provide additional
+context to the automatically generated error messages.
+
+.. code-block:: c
+
+	char some_str[41];
+	generate_sha1_hex_string(some_str);
+
+	/* Before. Not easy to tell why the test failed. */
+	KUNIT_EXPECT_EQ(test, strlen(some_str), 40);
+
+	/* After. Now we see the offending string. */
+	KUNIT_EXPECT_EQ_MSG(test, strlen(some_str), 40, "some_str='%s'", some_str);
+
+Alternatively, one can take full control over the error message by using
+``KUNIT_FAIL()``, e.g.
+
+.. code-block:: c
+
+	/* Before */
+	KUNIT_EXPECT_EQ(test, some_setup_function(), 0);
+
+	/* After: full control over the failure message. */
+	if (some_setup_function())
+		KUNIT_FAIL(test, "Failed to setup thing for testing");
+
 
 Test Suites
 ~~~~~~~~~~~
···
 		{}
 	};
 
-Exiting Early on Failed Expectations
-------------------------------------
-
-We can use ``KUNIT_EXPECT_EQ`` to mark the test as failed and continue
-execution.  In some cases, it is unsafe to continue. We can use the
-``KUNIT_ASSERT`` variant to exit on failure.
-
-.. code-block:: c
-
-	void example_test_user_alloc_function(struct kunit *test)
-	{
-		void *object = alloc_some_object_for_me();
-
-		/* Make sure we got a valid pointer back. */
-		KUNIT_ASSERT_NOT_ERR_OR_NULL(test, object);
-		do_something_with_object(object);
-	}
-
 Allocating Memory
 -----------------
 
···
 Accessing The Current Test
 --------------------------
 
-In some cases, we need to call test-only code from outside the test file.
-For example, see example in section *Injecting Test-Only Code* or if
-we are providing a fake implementation of an ops struct. Using
-``kunit_test`` field in ``task_struct``, we can access it via
-``current->kunit_test``.
+In some cases, we need to call test-only code from outside the test file.  This
+is helpful, for example, when providing a fake implementation of a function, or
+to fail any current test from within an error handler.
+We can do this via the ``kunit_test`` field in ``task_struct``, which we can
+access using the ``kunit_get_current_test()`` function in ``kunit/test-bug.h``.
 
-The example below includes how to implement "mocking":
+``kunit_get_current_test()`` is safe to call even if KUnit is not enabled. If
+KUnit is not enabled, was built as a module (``CONFIG_KUNIT=m``), or no test is
+running in the current task, it will return ``NULL``. This compiles down to
+either a no-op or a static key check, so will have a negligible performance
+impact when no test is running.
+
+The example below uses this to implement a "mock" implementation of a function, ``foo``:
 
 .. code-block:: c
 
-	#include <linux/sched.h> /* for current */
+	#include <kunit/test-bug.h> /* for kunit_get_current_test */
 
 	struct test_data {
 		int foo_result;
···
 
 	static int fake_foo(int arg)
 	{
-		struct kunit *test = current->kunit_test;
+		struct kunit *test = kunit_get_current_test();
 		struct test_data *test_data = test->priv;
 
 		KUNIT_EXPECT_EQ(test, test_data->want_foo_called_with, arg);
···
 flexibility as a ``priv`` member, but also, for example, allowing helper
 functions to create resources without conflicting with each other. It is also
 possible to define a clean up function for each resource, making it easy to
-avoid resource leaks. For more information, see Documentation/dev-tools/kunit/api/test.rst.
+avoid resource leaks. For more information, see Documentation/dev-tools/kunit/api/resource.rst.
 
 Failing The Current Test
 ------------------------
···
 	#else
 	static void my_debug_function(void) { }
 	#endif
+
+``kunit_fail_current_test()`` is safe to call even if KUnit is not enabled. If
+KUnit is not enabled, was built as a module (``CONFIG_KUNIT=m``), or no test is
+running in the current task, it will do nothing. This compiles down to either a
+no-op or a static key check, so will have a negligible performance impact when
+no test is running.
 

drivers/gpu/drm/tests/drm_format_helper_test.c

···
 	iosys_map_set_vaddr(&src, xrgb8888);
 
 	drm_fb_xrgb8888_to_gray8(&dst, &result->dst_pitch, &src, &fb, &params->clip);
-	KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0);
+	KUNIT_EXPECT_MEMEQ(test, buf, result->expected, dst_size);
 }
 
 static void drm_test_fb_xrgb8888_to_rgb332(struct kunit *test)
···
 	iosys_map_set_vaddr(&src, xrgb8888);
 
 	drm_fb_xrgb8888_to_rgb332(&dst, &result->dst_pitch, &src, &fb, &params->clip);
-	KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0);
+	KUNIT_EXPECT_MEMEQ(test, buf, result->expected, dst_size);
 }
 
 static void drm_test_fb_xrgb8888_to_rgb565(struct kunit *test)
···
 	iosys_map_set_vaddr(&src, xrgb8888);
 
 	drm_fb_xrgb8888_to_rgb565(&dst, &result->dst_pitch, &src, &fb, &params->clip, false);
-	KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0);
+	KUNIT_EXPECT_MEMEQ(test, buf, result->expected, dst_size);
 
 	drm_fb_xrgb8888_to_rgb565(&dst, &result->dst_pitch, &src, &fb, &params->clip, true);
-	KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected_swab, dst_size), 0);
+	KUNIT_EXPECT_MEMEQ(test, buf, result->expected_swab, dst_size);
 }
 
 static void drm_test_fb_xrgb8888_to_rgb888(struct kunit *test)
···
 	iosys_map_set_vaddr(&src, xrgb8888);
 
 	drm_fb_xrgb8888_to_rgb888(&dst, &result->dst_pitch, &src, &fb, &params->clip);
-	KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0);
+	KUNIT_EXPECT_MEMEQ(test, buf, result->expected, dst_size);
 }
 
 static void drm_test_fb_xrgb8888_to_xrgb2101010(struct kunit *test)
···
 
 	drm_fb_xrgb8888_to_xrgb2101010(&dst, &result->dst_pitch, &src, &fb, &params->clip);
 	buf = le32buf_to_cpu(test, buf, dst_size / sizeof(u32));
-	KUNIT_EXPECT_EQ(test, memcmp(buf, result->expected, dst_size), 0);
+	KUNIT_EXPECT_MEMEQ(test, buf, result->expected, dst_size);
 }
 
 static struct kunit_case drm_format_helper_test_cases[] = {

include/kunit/assert.h

···
 			       struct string_stream *stream);
 
 /**
- * KUNIT_INIT_UNARY_ASSERT_STRUCT() - Initializes &struct kunit_unary_assert.
- * @cond: A string representation of the expression asserted true or false.
- * @expect_true: True if of type KUNIT_{EXPECT|ASSERT}_TRUE, false otherwise.
- *
- * Initializes a &struct kunit_unary_assert. Intended to be used in
- * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros.
- */
-#define KUNIT_INIT_UNARY_ASSERT_STRUCT(cond, expect_true) {		       \
-	.condition = cond,						       \
-	.expected_true = expect_true					       \
-}
-
-/**
  * struct kunit_ptr_not_err_assert - An expectation/assertion that a pointer is
  *	not NULL and not a -errno.
  * @assert: The parent of this type.
···
 void kunit_ptr_not_err_assert_format(const struct kunit_assert *assert,
 				     const struct va_format *message,
 				     struct string_stream *stream);
-
-/**
- * KUNIT_INIT_PTR_NOT_ERR_ASSERT_STRUCT() - Initializes a
- *	&struct kunit_ptr_not_err_assert.
- * @txt: A string representation of the expression passed to the expectation.
- * @val: The actual evaluated pointer value of the expression.
- *
- * Initializes a &struct kunit_ptr_not_err_assert. Intended to be used in
- * KUNIT_EXPECT_* and KUNIT_ASSERT_* macros.
- */
-#define KUNIT_INIT_PTR_NOT_ERR_STRUCT(txt, val) {			       \
-	.text = txt,							       \
-	.value = val							       \
-}
 
 /**
  * struct kunit_binary_assert_text - holds strings for &struct
···
 void kunit_binary_assert_format(const struct kunit_assert *assert,
 				const struct va_format *message,
 				struct string_stream *stream);
-
-/**
- * KUNIT_INIT_BINARY_ASSERT_STRUCT() - Initializes a binary assert like
- *	kunit_binary_assert, kunit_binary_ptr_assert, etc.
- *
- * @text_: Pointer to a kunit_binary_assert_text.
- * @left_val: The actual evaluated value of the expression in the left slot.
- * @right_val: The actual evaluated value of the expression in the right slot.
- *
- * Initializes a binary assert like kunit_binary_assert,
- * kunit_binary_ptr_assert, etc. This relies on these structs having the same
- * fields but with different types for left_val/right_val.
- * This is ultimately used by binary assertion macros like KUNIT_EXPECT_EQ, etc.
- */
-#define KUNIT_INIT_BINARY_ASSERT_STRUCT(text_,				       \
-					left_val,			       \
-					right_val) {			       \
-	.text = text_,							       \
-	.left_value = left_val,						       \
-	.right_value = right_val					       \
-}
 
 /**
  * struct kunit_binary_ptr_assert - An expectation/assertion that compares two
···
 void kunit_binary_str_assert_format(const struct kunit_assert *assert,
 				    const struct va_format *message,
 				    struct string_stream *stream);
+
+/**
+ * struct kunit_mem_assert - An expectation/assertion that compares two
+ *	memory blocks.
+ * @assert: The parent of this type.
+ * @text: Holds the textual representations of the operands and comparator.
+ * @left_value: The actual evaluated value of the expression in the left slot.
+ * @right_value: The actual evaluated value of the expression in the right slot.
+ * @size: Size of the memory block analysed in bytes.
+ *
+ * Represents an expectation/assertion that compares two memory blocks. For
+ * example, to expect that the first three bytes of foo is equal to the
+ * first three bytes of bar, you can use the expectation
+ * KUNIT_EXPECT_MEMEQ(test, foo, bar, 3);
+ */
+struct kunit_mem_assert {
+	struct kunit_assert assert;
+	const struct kunit_binary_assert_text *text;
+	const void *left_value;
+	const void *right_value;
+	const size_t size;
+};
+
+void kunit_mem_assert_format(const struct kunit_assert *assert,
+			     const struct va_format *message,
+			     struct string_stream *stream);
 
 #endif /*  _KUNIT_ASSERT_H */

include/kunit/test-bug.h

···
 #ifndef _KUNIT_TEST_BUG_H
 #define _KUNIT_TEST_BUG_H
 
-#define kunit_fail_current_test(fmt, ...) \
-	__kunit_fail_current_test(__FILE__, __LINE__, fmt, ##__VA_ARGS__)
-
 #if IS_BUILTIN(CONFIG_KUNIT)
+
+#include <linux/jump_label.h> /* For static branch */
+#include <linux/sched.h>
+
+/* Static key if KUnit is running any tests. */
+DECLARE_STATIC_KEY_FALSE(kunit_running);
+
+/**
+ * kunit_get_current_test() - Return a pointer to the currently running
+ *			      KUnit test.
+ *
+ * If a KUnit test is running in the current task, returns a pointer to its
+ * associated struct kunit. This pointer can then be passed to any KUnit
+ * function or assertion. If no test is running (or a test is running in a
+ * different task), returns NULL.
+ *
+ * This function is safe to call even when KUnit is disabled. If CONFIG_KUNIT
+ * is not enabled, it will compile down to nothing and will return quickly no
+ * test is running.
+ */
+static inline struct kunit *kunit_get_current_test(void)
+{
+	if (!static_branch_unlikely(&kunit_running))
+		return NULL;
+
+	return current->kunit_test;
+}
+
+
+/**
+ * kunit_fail_current_test() - If a KUnit test is running, fail it.
+ *
+ * If a KUnit test is running in the current task, mark that test as failed.
+ *
+ * This macro will only work if KUnit is built-in (though the tests
+ * themselves can be modules). Otherwise, it compiles down to nothing.
+ */
+#define kunit_fail_current_test(fmt, ...) do {					\
+		if (static_branch_unlikely(&kunit_running)) {			\
+			__kunit_fail_current_test(__FILE__, __LINE__,		\
+						  fmt, ##__VA_ARGS__);		\
+		}								\
+	} while (0)
+
 
 extern __printf(3, 4) void __kunit_fail_current_test(const char *file, int line,
 						    const char *fmt, ...);
 
 #else
+
+static inline struct kunit *kunit_get_current_test(void) { return NULL; }
+
+/* We define this with an empty helper function so format string warnings work */
+#define kunit_fail_current_test(fmt, ...) \
+		__kunit_fail_current_test(__FILE__, __LINE__, fmt, ##__VA_ARGS__)
 
 static inline __printf(3, 4) void __kunit_fail_current_test(const char *file, int line,
 							    const char *fmt, ...)

include/kunit/test.h

···
 #include <linux/container_of.h>
 #include <linux/err.h>
 #include <linux/init.h>
+#include <linux/jump_label.h>
 #include <linux/kconfig.h>
 #include <linux/kref.h>
 #include <linux/list.h>
···
 #include <linux/types.h>
 
 #include <asm/rwonce.h>
+
+/* Static key: true if any KUnit tests are currently running */
+DECLARE_STATIC_KEY_FALSE(kunit_running);
 
 struct kunit;
 
···
 			     fmt,					       \
 			     ##__VA_ARGS__)
 
+/* Helper to safely pass around an initializer list to other macros. */
+#define KUNIT_INIT_ASSERT(initializers...) { initializers }
+
 #define KUNIT_UNARY_ASSERTION(test,					       \
 			      assert_type,				       \
-			      condition,				       \
-			      expected_true,				       \
+			      condition_,				       \
+			      expected_true_,				       \
 			      fmt,					       \
 			      ...)					       \
 do {									       \
-	if (likely(!!(condition) == !!expected_true))			       \
+	if (likely(!!(condition_) == !!expected_true_))			       \
 		break;							       \
 									       \
 	_KUNIT_FAILED(test,						       \
 		      assert_type,					       \
 		      kunit_unary_assert,				       \
 		      kunit_unary_assert_format,			       \
-		      KUNIT_INIT_UNARY_ASSERT_STRUCT(#condition,	       \
-						     expected_true),	       \
+		      KUNIT_INIT_ASSERT(.condition = #condition_,	       \
+					.expected_true = expected_true_),      \
 		      fmt,						       \
 		      ##__VA_ARGS__);					       \
 } while (0)
···
 		      assert_type,					       \
 		      assert_class,					       \
 		      format_func,					       \
-		      KUNIT_INIT_BINARY_ASSERT_STRUCT(&__text,		       \
-						      __left,		       \
-						      __right),		       \
+		      KUNIT_INIT_ASSERT(.text = &__text,		       \
+					.left_value = __left,		       \
+					.right_value = __right),	       \
 		      fmt,						       \
 		      ##__VA_ARGS__);					       \
 } while (0)
···
 		      assert_type,					       \
 		      kunit_binary_str_assert,				       \
 		      kunit_binary_str_assert_format,			       \
-		      KUNIT_INIT_BINARY_ASSERT_STRUCT(&__text,		       \
-						      __left,		       \
-						      __right),		       \
+		      KUNIT_INIT_ASSERT(.text = &__text,		       \
+					.left_value = __left,		       \
+					.right_value = __right),	       \
+		      fmt,						       \
+		      ##__VA_ARGS__);					       \
+} while (0)
+
+#define KUNIT_MEM_ASSERTION(test,					       \
+			    assert_type,				       \
+			    left,					       \
+			    op,						       \
+			    right,					       \
+			    size_,					       \
+			    fmt,					       \
+			    ...)					       \
+do {									       \
+	const void *__left = (left);					       \
+	const void *__right = (right);					       \
+	const size_t __size = (size_);					       \
+	static const struct kunit_binary_assert_text __text = {		       \
+		.operation = #op,					       \
+		.left_text = #left,					       \
+		.right_text = #right,					       \
+	};								       \
+									       \
+	if (likely(memcmp(__left, __right, __size) op 0))		       \
+		break;							       \
+									       \
+	_KUNIT_FAILED(test,						       \
+		      assert_type,					       \
+		      kunit_mem_assert,					       \
+		      kunit_mem_assert_format,				       \
+		      KUNIT_INIT_ASSERT(.text = &__text,		       \
+					.left_value = __left,		       \
+					.right_value = __right,		       \
+					.size = __size),		       \
 		      fmt,						       \
 		      ##__VA_ARGS__);					       \
 } while (0)
···
 		      assert_type,					       \
 		      kunit_ptr_not_err_assert,				       \
 		      kunit_ptr_not_err_assert_format,			       \
-		      KUNIT_INIT_PTR_NOT_ERR_STRUCT(#ptr, __ptr),	       \
+		      KUNIT_INIT_ASSERT(.text = #ptr, .value = __ptr),	       \
 		      fmt,						       \
 		      ##__VA_ARGS__);					       \
 } while (0)
···
 				   left, !=, right,			       \
 				   fmt,					       \
 				   ##__VA_ARGS__)
+
+/**
+ * KUNIT_EXPECT_MEMEQ() - Expects that the first @size bytes of @left and @right are equal.
+ * @test: The test context object.
+ * @left: An arbitrary expression that evaluates to the specified size.
+ * @right: An arbitrary expression that evaluates to the specified size.
+ * @size: Number of bytes compared.
+ *
+ * Sets an expectation that the values that @left and @right evaluate to are
+ * equal. This is semantically equivalent to
+ * KUNIT_EXPECT_TRUE(@test, !memcmp((@left), (@right), (@size))). See
+ * KUNIT_EXPECT_TRUE() for more information.
+ *
+ * Although this expectation works for any memory block, it is not recommended
+ * for comparing more structured data, such as structs. This expectation is
+ * recommended for comparing, for example, data arrays.
+ */
+#define KUNIT_EXPECT_MEMEQ(test, left, right, size) \
+	KUNIT_EXPECT_MEMEQ_MSG(test, left, right, size, NULL)
+
+#define KUNIT_EXPECT_MEMEQ_MSG(test, left, right, size, fmt, ...)	       \
+	KUNIT_MEM_ASSERTION(test,					       \
+			    KUNIT_EXPECTATION,				       \
+			    left, ==, right,				       \
+			    size,					       \
+			    fmt,					       \
+			    ##__VA_ARGS__)
+
+/**
+ * KUNIT_EXPECT_MEMNEQ() - Expects that the first @size bytes of @left and @right are not equal.
+ * @test: The test context object.
+ * @left: An arbitrary expression that evaluates to the specified size.
+ * @right: An arbitrary expression that evaluates to the specified size.
+ * @size: Number of bytes compared.
+ *
+ * Sets an expectation that the values that @left and @right evaluate to are
+ * not equal. This is semantically equivalent to
+ * KUNIT_EXPECT_TRUE(@test, memcmp((@left), (@right), (@size))). See
+ * KUNIT_EXPECT_TRUE() for more information.
+ *
+ * Although this expectation works for any memory block, it is not recommended
+ * for comparing more structured data, such as structs. This expectation is
+ * recommended for comparing, for example, data arrays.
+ */
+#define KUNIT_EXPECT_MEMNEQ(test, left, right, size) \
+	KUNIT_EXPECT_MEMNEQ_MSG(test, left, right, size, NULL)
+
+#define KUNIT_EXPECT_MEMNEQ_MSG(test, left, right, size, fmt, ...)	       \
+	KUNIT_MEM_ASSERTION(test,					       \
+			    KUNIT_EXPECTATION,				       \
+			    left, !=, right,				       \
+			    size,					       \
+			    fmt,					       \
+			    ##__VA_ARGS__)
 
 /**
  * KUNIT_EXPECT_NULL() - Expects that @ptr is null.

include/kunit/visibility.h

···
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * KUnit API to allow symbols to be conditionally visible during KUnit
+ * testing
+ *
+ * Copyright (C) 2022, Google LLC.
+ * Author: Rae Moar <[e-mail]>
+ */
+
+#ifndef _KUNIT_VISIBILITY_H
+#define _KUNIT_VISIBILITY_H
+
+#if IS_ENABLED(CONFIG_KUNIT)
+    /**
+     * VISIBLE_IF_KUNIT - A macro that sets symbols to be static if
+     * CONFIG_KUNIT is not enabled. Otherwise if CONFIG_KUNIT is enabled
+     * there is no change to the symbol definition.
+     */
+    #define VISIBLE_IF_KUNIT
+    /**
+     * EXPORT_SYMBOL_IF_KUNIT(symbol) - Exports symbol into
+     * EXPORTED_FOR_KUNIT_TESTING namespace only if CONFIG_KUNIT is
+     * enabled. Must use MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING)
+     * in test file in order to use symbols.
+     */
+    #define EXPORT_SYMBOL_IF_KUNIT(symbol) EXPORT_SYMBOL_NS(symbol, \
+	    EXPORTED_FOR_KUNIT_TESTING)
+#else
+    #define VISIBLE_IF_KUNIT static
+    #define EXPORT_SYMBOL_IF_KUNIT(symbol)
+#endif
+
+#endif /* _KUNIT_VISIBILITY_H */

lib/kunit/assert.c

···
 			  binary_assert->text->right_text);
 	if (!is_literal(stream->test, binary_assert->text->left_text,
 			binary_assert->left_value, stream->gfp))
-		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld\n",
+		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld (0x%llx)\n",
 				  binary_assert->text->left_text,
+				  binary_assert->left_value,
 				  binary_assert->left_value);
 	if (!is_literal(stream->test, binary_assert->text->right_text,
 			binary_assert->right_value, stream->gfp))
-		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld",
+		string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s == %lld (0x%llx)",
 				  binary_assert->text->right_text,
+				  binary_assert->right_value,
 				  binary_assert->right_value);
 	kunit_assert_print_msg(message, stream);
 }
···
 	kunit_assert_print_msg(message, stream);
 }
 EXPORT_SYMBOL_GPL(kunit_binary_str_assert_format);
+
+/* Adds a hexdump of a buffer to a string_stream comparing it with
+ * a second buffer. The different bytes are marked with <>.
+ */
+static void kunit_assert_hexdump(struct string_stream *stream,
+				 const void *buf,
+				 const void *compared_buf,
+				 const size_t len)
+{
+	size_t i;
+	const u8 *buf1 = buf;
+	const u8 *buf2 = compared_buf;
+
+	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT);
+
+	for (i = 0; i < len; ++i) {
+		if (!(i % 16) && i)
+			string_stream_add(stream, "\n" KUNIT_SUBSUBTEST_INDENT);
+
+		if (buf1[i] != buf2[i])
+			string_stream_add(stream, "<%02x>", buf1[i]);
+		else
+			string_stream_add(stream, " %02x ", buf1[i]);
+	}
+}
+
+void kunit_mem_assert_format(const struct kunit_assert *assert,
+			     const struct va_format *message,
+			     struct string_stream *stream)
+{
+	struct kunit_mem_assert *mem_assert;
+
+	mem_assert = container_of(assert, struct kunit_mem_assert,
+				  assert);
+
+	string_stream_add(stream,
+			  KUNIT_SUBTEST_INDENT "Expected %s %s %s, but\n",
+			  mem_assert->text->left_text,
+			  mem_assert->text->operation,
+			  mem_assert->text->right_text);
+
+	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
+			  mem_assert->text->left_text);
+	kunit_assert_hexdump(stream, mem_assert->left_value,
+			     mem_assert->right_value, mem_assert->size);
+
+	string_stream_add(stream, "\n");
+
+	string_stream_add(stream, KUNIT_SUBSUBTEST_INDENT "%s ==\n",
+			  mem_assert->text->right_text);
+	kunit_assert_hexdump(stream, mem_assert->right_value,
+			     mem_assert->left_value, mem_assert->size);
+
+	kunit_assert_print_msg(message, stream);
+}
+EXPORT_SYMBOL_GPL(kunit_mem_assert_format);

lib/kunit/debugfs.c

···
 	kunit_suite_for_each_test_case(suite, test_case)
 		debugfs_print_result(seq, suite, test_case);
 
-	seq_printf(seq, "%s %d - %s\n",
+	seq_printf(seq, "%s %d %s\n",
 		   kunit_status_to_ok_not_ok(success), 1, suite->name);
 	return 0;
 }

lib/kunit/executor.c

···
 {
 	size_t num_suites = suite_set->end - suite_set->start;
 
-	pr_info("TAP version 14\n");
+	pr_info("KTAP version 1\n");
 	pr_info("1..%zu\n", num_suites);
 
 	__kunit_test_suites_init(suite_set->start, num_suites);
···
 	struct kunit_suite * const *suites;
 	struct kunit_case *test_case;
 
-	/* Hack: print a tap header so kunit.py can find the start of KUnit output. */
-	pr_info("TAP version 14\n");
+	/* Hack: print a ktap header so kunit.py can find the start of KUnit output. */
+	pr_info("KTAP version 1\n");
 
 	for (suites = suite_set->start; suites < suite_set->end; suites++)
 		kunit_suite_for_each_test_case((*suites), test_case) {

lib/kunit/kunit-example-test.c

···
  */
 static void example_all_expect_macros_test(struct kunit *test)
 {
+	const u32 array1[] = { 0x0F, 0xFF };
+	const u32 array2[] = { 0x1F, 0xFF };
+
 	/* Boolean assertions */
 	KUNIT_EXPECT_TRUE(test, true);
 	KUNIT_EXPECT_FALSE(test, false);
···
 	/* String assertions */
 	KUNIT_EXPECT_STREQ(test, "hi", "hi");
 	KUNIT_EXPECT_STRNEQ(test, "hi", "bye");
+
+	/* Memory block assertions */
+	KUNIT_EXPECT_MEMEQ(test, array1, array1, sizeof(array1));
+	KUNIT_EXPECT_MEMNEQ(test, array1, array2, sizeof(array1));
 
 	/*
 	 * There are also ASSERT variants of all of the above that abort test

lib/kunit/string-stream.c

···
 	return list_empty(&stream->fragments);
 }
 
-struct string_stream_alloc_context {
-	struct kunit *test;
-	gfp_t gfp;
-};
-
 struct string_stream *alloc_string_stream(struct kunit *test, gfp_t gfp)
 {
 	struct string_stream *stream;

lib/kunit/test.c

···
 #include "string-stream.h"
 #include "try-catch-impl.h"
 
+DEFINE_STATIC_KEY_FALSE(kunit_running);
+
 #if IS_BUILTIN(CONFIG_KUNIT)
 /*
  * Fail the current test and print an error message to the log.
···
 
 static void kunit_print_suite_start(struct kunit_suite *suite)
 {
+	kunit_log(KERN_INFO, suite, KUNIT_SUBTEST_INDENT "KTAP version 1\n");
 	kunit_log(KERN_INFO, suite, KUNIT_SUBTEST_INDENT "# Subtest: %s",
 		  suite->name);
 	kunit_log(KERN_INFO, suite, KUNIT_SUBTEST_INDENT "1..%zd",
···
 	 * representation.
 	 */
 	if (suite)
-		pr_info("%s %zd - %s%s%s\n",
+		pr_info("%s %zd %s%s%s\n",
 			kunit_status_to_ok_not_ok(status),
 			test_number, description, directive_header,
 			(status == KUNIT_SKIPPED) ? directive : "");
 	else
 		kunit_log(KERN_INFO, test,
-			  KUNIT_SUBTEST_INDENT "%s %zd - %s%s%s",
+			  KUNIT_SUBTEST_INDENT "%s %zd %s%s%s",
 			  kunit_status_to_ok_not_ok(status),
 			  test_number, description, directive_header,
 			  (status == KUNIT_SKIPPED) ? directive : "");
···
 			param_desc[0] = '\0';
 			test.param_value = test_case->generate_params(NULL, param_desc);
 			kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT
+				  "KTAP version 1\n");
+			kunit_log(KERN_INFO, &test, KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT
 				  "# Subtest: %s", test_case->name);
 
 			while (test.param_value) {
···
 
 				kunit_log(KERN_INFO, &test,
 					  KUNIT_SUBTEST_INDENT KUNIT_SUBTEST_INDENT
-					  "%s %d - %s",
+					  "%s %d %s",
 					  kunit_status_to_ok_not_ok(test.status),
 					  test.param_index + 1, param_desc);
 
···
 		return 0;
 	}
 
+	static_branch_inc(&kunit_running);
+
 	for (i = 0; i < num_suites; i++) {
 		kunit_init_suite(suites[i]);
 		kunit_run_tests(suites[i]);
 	}
+
+	static_branch_dec(&kunit_running);
 	return 0;
 }
 EXPORT_SYMBOL_GPL(__kunit_test_suites_init);

lib/slub_kunit.c

···
 // SPDX-License-Identifier: GPL-2.0
 #include <kunit/test.h>
+#include <kunit/test-bug.h>
 #include <linux/mm.h>
 #include <linux/slab.h>
 #include <linux/module.h>

mm/slub.c

···
 #include <linux/memcontrol.h>
 #include <linux/random.h>
 #include <kunit/test.h>
+#include <kunit/test-bug.h>
 #include <linux/sort.h>
 
 #include <linux/debugfs.h>
···
 {
 	struct kunit_resource *resource;
 
-	if (likely(!current->kunit_test))
+	if (!kunit_get_current_test())
 		return false;
 
 	resource = kunit_find_named_resource(current->kunit_test, "slab_errors");

net/core/dev_addr_lists_test.c

···
 
 	memset(addr, 2, sizeof(addr));
 	eth_hw_addr_set(netdev, addr);
-	KUNIT_EXPECT_EQ(test, 0, memcmp(netdev->dev_addr, addr, sizeof(addr)));
+	KUNIT_EXPECT_MEMEQ(test, netdev->dev_addr, addr, sizeof(addr));
 
 	memset(addr, 3, sizeof(addr));
 	dev_addr_set(netdev, addr);
-	KUNIT_EXPECT_EQ(test, 0, memcmp(netdev->dev_addr, addr, sizeof(addr)));
+	KUNIT_EXPECT_MEMEQ(test, netdev->dev_addr, addr, sizeof(addr));
 }
 
 static void dev_addr_test_sync_one(struct kunit *test)

security/apparmor/Kconfig

···
 	  Disabling the check will speed up policy loads.
 
 config SECURITY_APPARMOR_KUNIT_TEST
-	bool "Build KUnit tests for policy_unpack.c" if !KUNIT_ALL_TESTS
-	depends on KUNIT=y && SECURITY_APPARMOR
+	tristate "Build KUnit tests for policy_unpack.c" if !KUNIT_ALL_TESTS
+	depends on KUNIT && SECURITY_APPARMOR
 	default KUNIT_ALL_TESTS
 	help
 	  This builds the AppArmor KUnit tests.

security/apparmor/Makefile

···
               resource.o secid.o file.o policy_ns.o label.o mount.o net.o
 apparmor-$(CONFIG_SECURITY_APPARMOR_HASH) += crypto.o
 
+obj-$(CONFIG_SECURITY_APPARMOR_KUNIT_TEST) += apparmor_policy_unpack_test.o
+apparmor_policy_unpack_test-objs += policy_unpack_test.o
+
 clean-files := capability_names.h rlim_names.h net_names.h
 
 # Build a lower case string table of address family names

security/apparmor/include/policy_unpack.h

···
 };
 
 /*
+ * The AppArmor interface treats data as a type byte followed by the
+ * actual data.  The interface has the notion of a named entry
+ * which has a name (AA_NAME typecode followed by name string) followed by
+ * the entries typecode and data.  Named types allow for optional
+ * elements and extensions to be added and tested for without breaking
+ * backwards compatibility.
+ */
+
+enum aa_code {
+	AA_U8,
+	AA_U16,
+	AA_U32,
+	AA_U64,
+	AA_NAME,		/* same as string except it is items name */
+	AA_STRING,
+	AA_BLOB,
+	AA_STRUCT,
+	AA_STRUCTEND,
+	AA_LIST,
+	AA_LISTEND,
+	AA_ARRAY,
+	AA_ARRAYEND,
+};
+
+/*
+ * aa_ext is the read of the buffer containing the serialized profile.  The
+ * data is copied into a kernel buffer in apparmorfs and then handed off to
+ * the unpack routines.
+ */
+struct aa_ext {
+	void *start;
+	void *end;
+	void *pos;		/* pointer to current position in the buffer */
+	u32 version;
+};
+
+/*
  * struct aa_loaddata - buffer of policy raw_data set
  *
  * there is no loaddata ref for being on ns list, nor a ref from
···
 	if (data)
 		kref_put(&data->count, aa_loaddata_kref);
 }
+
+#if IS_ENABLED(CONFIG_KUNIT)
+bool aa_inbounds(struct aa_ext *e, size_t size);
+size_t aa_unpack_u16_chunk(struct aa_ext *e, char **chunk);
+bool aa_unpack_X(struct aa_ext *e, enum aa_code code);
+bool aa_unpack_nameX(struct aa_ext *e, enum aa_code code, const char *name);
+bool aa_unpack_u32(struct aa_ext *e, u32 *data, const char *name);
+bool aa_unpack_u64(struct aa_ext *e, u64 *data, const char *name);
+size_t aa_unpack_array(struct aa_ext *e, const char *name);
+size_t aa_unpack_blob(struct aa_ext *e, char **blob, const char *name);
+int aa_unpack_str(struct aa_ext *e, const char **string, const char *name);
+int aa_unpack_strdup(struct aa_ext *e, char **string, const char *name);
+#endif
 
 #endif /* __POLICY_INTERFACE_H */

security/apparmor/policy_unpack.c

···
  */
 
 #include <asm/unaligned.h>
+#include <kunit/visibility.h>
 #include <linux/ctype.h>
 #include <linux/errno.h>
 #include <linux/zlib.h>
···
 #define v6	6	/* per entry policydb mediation check */
 #define v7	7
 #define v8	8	/* full network masking */
-
-/*
- * The AppArmor interface treats data as a type byte followed by the
- * actual data.  The interface has the notion of a named entry
- * which has a name (AA_NAME typecode followed by name string) followed by
- * the entries typecode and data.  Named types allow for optional
- * elements and extensions to be added and tested for without breaking
- * backwards compatibility.
- */
-
-enum aa_code {
-	AA_U8,
-	AA_U16,
-	AA_U32,
-	AA_U64,
-	AA_NAME,		/* same as string except it is items name */
-	AA_STRING,
-	AA_BLOB,
-	AA_STRUCT,
-	AA_STRUCTEND,
-	AA_LIST,
-	AA_LISTEND,
-	AA_ARRAY,
-	AA_ARRAYEND,
-};
-
-/*
- * aa_ext is the read of the buffer containing the serialized profile.  The
- * data is copied into a kernel buffer in apparmorfs and then handed off to
- * the unpack routines.
- */
-struct aa_ext {
-	void *start;
-	void *end;
-	void *pos;		/* pointer to current position in the buffer */
-	u32 version;
-};
 
 /* audit callback for unpack fields */
 static void audit_cb(struct audit_buffer *ab, void *va)
···
 }
 
 /* test if read will be in packed data bounds */
-static bool inbounds(struct aa_ext *e, size_t size)
+VISIBLE_IF_KUNIT bool aa_inbounds(struct aa_ext *e, size_t size)
 {
 	return (size <= e->end - e->pos);
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_inbounds);
 
 static void *kvmemdup(const void *src, size_t len)
 {
···
 }
 
 /**
- * unpack_u16_chunk - test and do bounds checking for a u16 size based chunk
+ * aa_unpack_u16_chunk - test and do bounds checking for a u16 size based chunk
  * @e: serialized data read head (NOT NULL)
  * @chunk: start address for chunk of data (NOT NULL)
  *
  * Returns: the size of chunk found with the read head at the end of the chunk.
  */
-static size_t unpack_u16_chunk(struct aa_ext *e, char **chunk)
+VISIBLE_IF_KUNIT size_t aa_unpack_u16_chunk(struct aa_ext *e, char **chunk)
 {
 	size_t size = 0;
 	void *pos = e->pos;
 
-	if (!inbounds(e, sizeof(u16)))
+	if (!aa_inbounds(e, sizeof(u16)))
 		goto fail;
 	size = le16_to_cpu(get_unaligned((__le16 *) e->pos));
 	e->pos += sizeof(__le16);
-	if (!inbounds(e, size))
+	if (!aa_inbounds(e, size))
 		goto fail;
 	*chunk = e->pos;
 	e->pos += size;
···
 	e->pos = pos;
 	return 0;
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_unpack_u16_chunk);
 
 /* unpack control byte */
-static bool unpack_X(struct aa_ext *e, enum aa_code code)
+VISIBLE_IF_KUNIT bool aa_unpack_X(struct aa_ext *e, enum aa_code code)
 {
-	if (!inbounds(e, 1))
+	if (!aa_inbounds(e, 1))
 		return false;
 	if (*(u8 *) e->pos != code)
 		return false;
 	e->pos++;
 	return true;
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_unpack_X);
 
 /**
- * unpack_nameX - check is the next element is of type X with a name of @name
+ * aa_unpack_nameX - check is the next element is of type X with a name of @name
  * @e: serialized data extent information  (NOT NULL)
  * @code: type code
  * @name: name to match to the serialized element.  (MAYBE NULL)
···
  *
  * Returns: false if either match fails, the read head does not move
  */
-static bool unpack_nameX(struct aa_ext *e, enum aa_code code, const char *name)
+VISIBLE_IF_KUNIT bool aa_unpack_nameX(struct aa_ext *e, enum aa_code code, const char *name)
 {
 	/*
 	 * May need to reset pos if name or type doesn't match
···
 	 * Check for presence of a tagname, and if present name size
 	 * AA_NAME tag value is a u16.
 	 */
-	if (unpack_X(e, AA_NAME)) {
+	if (aa_unpack_X(e, AA_NAME)) {
 		char *tag = NULL;
-		size_t size = unpack_u16_chunk(e, &tag);
+		size_t size = aa_unpack_u16_chunk(e, &tag);
 		/* if a name is specified it must match. otherwise skip tag */
 		if (name && (!size || tag[size-1] != '\0' || strcmp(name, tag)))
 			goto fail;
···
 	}
 
 	/* now check if type code matches */
-	if (unpack_X(e, code))
+	if (aa_unpack_X(e, code))
 		return true;
 
 fail:
 	e->pos = pos;
 	return false;
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_unpack_nameX);
 
 static bool unpack_u8(struct aa_ext *e, u8 *data, const char *name)
 {
 	void *pos = e->pos;
 
-	if (unpack_nameX(e, AA_U8, name)) {
-		if (!inbounds(e, sizeof(u8)))
+	if (aa_unpack_nameX(e, AA_U8, name)) {
+		if (!aa_inbounds(e, sizeof(u8)))
 			goto fail;
 		if (data)
 			*data = *((u8 *)e->pos);
···
 	return false;
 }
 
-static bool unpack_u32(struct aa_ext *e, u32 *data, const char *name)
+VISIBLE_IF_KUNIT bool aa_unpack_u32(struct aa_ext *e, u32 *data, const char *name)
 {
 	void *pos = e->pos;
 
-	if (unpack_nameX(e, AA_U32, name)) {
-		if (!inbounds(e, sizeof(u32)))
+	if (aa_unpack_nameX(e, AA_U32, name)) {
+		if (!aa_inbounds(e, sizeof(u32)))
 			goto fail;
 		if (data)
 			*data = le32_to_cpu(get_unaligned((__le32 *) e->pos));
···
 	e->pos = pos;
 	return false;
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_unpack_u32);
 
-static bool unpack_u64(struct aa_ext *e, u64 *data, const char *name)
+VISIBLE_IF_KUNIT bool aa_unpack_u64(struct aa_ext *e, u64 *data, const char *name)
 {
 	void *pos = e->pos;
 
-	if (unpack_nameX(e, AA_U64, name)) {
-		if (!inbounds(e, sizeof(u64)))
+	if (aa_unpack_nameX(e, AA_U64, name)) {
+		if (!aa_inbounds(e, sizeof(u64)))
 			goto fail;
 		if (data)
 			*data = le64_to_cpu(get_unaligned((__le64 *) e->pos));
···
 	e->pos = pos;
 	return false;
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_unpack_u64);
 
-static size_t unpack_array(struct aa_ext *e, const char *name)
+VISIBLE_IF_KUNIT size_t aa_unpack_array(struct aa_ext *e, const char *name)
 {
 	void *pos = e->pos;
 
-	if (unpack_nameX(e, AA_ARRAY, name)) {
+	if (aa_unpack_nameX(e, AA_ARRAY, name)) {
 		int size;
-		if (!inbounds(e, sizeof(u16)))
+		if (!aa_inbounds(e, sizeof(u16)))
 			goto fail;
 		size = (int)le16_to_cpu(get_unaligned((__le16 *) e->pos));
 		e->pos += sizeof(u16);
···
 	e->pos = pos;
 	return 0;
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_unpack_array);
 
-static size_t unpack_blob(struct aa_ext *e, char **blob, const char *name)
+VISIBLE_IF_KUNIT size_t aa_unpack_blob(struct aa_ext *e, char **blob, const char *name)
 {
 	void *pos = e->pos;
 
-	if (unpack_nameX(e, AA_BLOB, name)) {
+	if (aa_unpack_nameX(e, AA_BLOB, name)) {
 		u32 size;
-		if (!inbounds(e, sizeof(u32)))
+		if (!aa_inbounds(e, sizeof(u32)))
 			goto fail;
 		size = le32_to_cpu(get_unaligned((__le32 *) e->pos));
 		e->pos += sizeof(u32);
-		if (inbounds(e, (size_t) size)) {
+		if (aa_inbounds(e, (size_t) size)) {
 			*blob = e->pos;
 			e->pos += size;
 			return size;
···
 	e->pos = pos;
 	return 0;
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_unpack_blob);
 
-static int unpack_str(struct aa_ext *e, const char **string, const char *name)
+VISIBLE_IF_KUNIT int aa_unpack_str(struct aa_ext *e, const char **string, const char *name)
 {
 	char *src_str;
 	size_t size = 0;
 	void *pos = e->pos;
 	*string = NULL;
-	if (unpack_nameX(e, AA_STRING, name)) {
-		size = unpack_u16_chunk(e, &src_str);
+	if (aa_unpack_nameX(e, AA_STRING, name)) {
+		size = aa_unpack_u16_chunk(e, &src_str);
 		if (size) {
 			/* strings are null terminated, length is size - 1 */
 			if (src_str[size - 1] != 0)
···
 	e->pos = pos;
 	return 0;
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_unpack_str);
 
-static int unpack_strdup(struct aa_ext *e, char **string, const char *name)
+VISIBLE_IF_KUNIT int aa_unpack_strdup(struct aa_ext *e, char **string, const char *name)
 {
 	const char *tmp;
 	void *pos = e->pos;
-	int res = unpack_str(e, &tmp, name);
+	int res = aa_unpack_str(e, &tmp, name);
 	*string = NULL;
 
 	if (!res)
···
 
 	return res;
 }
+EXPORT_SYMBOL_IF_KUNIT(aa_unpack_strdup);
 
 
 /**
···
 	size_t size;
 	struct aa_dfa *dfa = NULL;
 
-	size = unpack_blob(e, &blob, "aadfa");
+	size = aa_unpack_blob(e, &blob, "aadfa");
 	if (size) {
 		/*
 		 * The dfa is aligned with in the blob to 8 bytes
···
 	void *saved_pos = e->pos;
 
 	/* exec table is optional */
-	if (unpack_nameX(e, AA_STRUCT, "xtable")) {
+	if (aa_unpack_nameX(e, AA_STRUCT, "xtable")) {
 		int i, size;
 
-		size = unpack_array(e, NULL);
+		size = aa_unpack_array(e, NULL);
 		/* currently 4 exec bits and entries 0-3 are reserved iupcx */
 		if (size > 16 - 4)
 			goto fail;
···
 		profile->file.trans.size = size;
 		for (i = 0; i < size; i++) {
 			char *str;
-			int c, j, pos, size2 = unpack_strdup(e, &str, NULL);
-			/* unpack_strdup verifies that the last character is
+			int c, j, pos, size2 = aa_unpack_strdup(e, &str, NULL);
+			/* aa_unpack_strdup verifies that the last character is
 			 * null termination byte.
 			 */
 			if (!size2)
···
 					goto fail;
 				/* beginning with : requires an embedded \0,
 				 * verify that exactly 1 internal \0 exists
-				 * trailing \0 already verified by unpack_strdup
+				 * trailing \0 already verified by aa_unpack_strdup
 				 *
 				 * convert \0 back to : for label_parse
 				 */
···
 				/* fail - all other cases with embedded \0 */
 				goto fail;
 		}
-		if (!unpack_nameX(e, AA_ARRAYEND, NULL))
+		if (!aa_unpack_nameX(e, AA_ARRAYEND, NULL))
 			goto fail;
-		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
+		if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL))
 			goto fail;
 	}
 	return true;
···
 {
 	void *pos = e->pos;
 
-	if (unpack_nameX(e, AA_STRUCT, "xattrs")) {
+	if (aa_unpack_nameX(e, AA_STRUCT, "xattrs")) {
 		int i, size;
 
-		size = unpack_array(e, NULL);
+		size = aa_unpack_array(e, NULL);
 		profile->xattr_count = size;
 		profile->xattrs = kcalloc(size, sizeof(char *), GFP_KERNEL);
 		if (!profile->xattrs)
 			goto fail;
 		for (i = 0; i < size; i++) {
-			if (!unpack_strdup(e, &profile->xattrs[i], NULL))
+			if (!aa_unpack_strdup(e, &profile->xattrs[i], NULL))
 				goto fail;
 		}
-		if (!unpack_nameX(e, AA_ARRAYEND, NULL))
+		if (!aa_unpack_nameX(e, AA_ARRAYEND, NULL))
 			goto fail;
-		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
+		if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL))
 			goto fail;
 	}
 
···
 	void *pos = e->pos;
 	int i, size;
 
-	if (unpack_nameX(e, AA_STRUCT, "secmark")) {
-		size = unpack_array(e, NULL);
+	if (aa_unpack_nameX(e, AA_STRUCT, "secmark")) {
+		size = aa_unpack_array(e, NULL);
 
 		profile->secmark = kcalloc(size, sizeof(struct aa_secmark),
 					   GFP_KERNEL);
···
 				goto fail;
 			if (!unpack_u8(e, &profile->secmark[i].deny, NULL))
 				goto fail;
-			if (!unpack_strdup(e, &profile->secmark[i].label, NULL))
+			if (!aa_unpack_strdup(e, &profile->secmark[i].label, NULL))
 				goto fail;
 		}
-		if (!unpack_nameX(e, AA_ARRAYEND, NULL))
+		if (!aa_unpack_nameX(e, AA_ARRAYEND, NULL))
 			goto fail;
-		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
+		if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL))
 			goto fail;
 	}
 
···
 	void *pos = e->pos;
 
 	/* rlimits are optional */
-	if (unpack_nameX(e, AA_STRUCT, "rlimits")) {
+	if (aa_unpack_nameX(e, AA_STRUCT, "rlimits")) {
 		int i, size;
 		u32 tmp = 0;
-		if (!unpack_u32(e, &tmp, NULL))
+		if (!aa_unpack_u32(e, &tmp, NULL))
 			goto fail;
 		profile->rlimits.mask = tmp;
 
-		size = unpack_array(e, NULL);
+		size = aa_unpack_array(e, NULL);
 		if (size > RLIM_NLIMITS)
 			goto fail;
 		for (i = 0; i < size; i++) {
 			u64 tmp2 = 0;
 			int a = aa_map_resource(i);
-			if (!unpack_u64(e, &tmp2, NULL))
+			if (!aa_unpack_u64(e, &tmp2, NULL))
 				goto fail;
 			profile->rlimits.limits[a].rlim_max = tmp2;
 		}
-		if (!unpack_nameX(e, AA_ARRAYEND, NULL))
+		if (!aa_unpack_nameX(e, AA_ARRAYEND, NULL))
 			goto fail;
-		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
+		if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL))
 			goto fail;
 	}
 	return true;
···
 	*ns_name = NULL;
 
 	/* check that we have the right struct being passed */
-	if (!unpack_nameX(e, AA_STRUCT, "profile"))
+	if (!aa_unpack_nameX(e, AA_STRUCT, "profile"))
 		goto fail;
-	if (!unpack_str(e, &name, NULL))
+	if (!aa_unpack_str(e, &name, NULL))
 		goto fail;
 	if (*name == '\0')
 		goto fail;
···
 		return ERR_PTR(-ENOMEM);
 
 	/* profile renaming is optional */
-	(void) unpack_str(e, &profile->rename, "rename");
+	(void) aa_unpack_str(e, &profile->rename, "rename");
 
 	/* attachment string is optional */
-	(void) unpack_str(e, &profile->attach, "attach");
+	(void) aa_unpack_str(e, &profile->attach, "attach");
 
 	/* xmatch is optional and may be NULL */
 	profile->xmatch = unpack_dfa(e);
···
 	}
 	/* xmatch_len is not optional if xmatch is set */
 	if (profile->xmatch) {
-		if (!unpack_u32(e, &tmp, NULL)) {
+		if (!aa_unpack_u32(e, &tmp, NULL)) {
 			info = "missing xmatch len";
 			goto fail;
 		}
···
 	}
 
 	/* disconnected attachment string is optional */
-	(void) unpack_str(e, &profile->disconnected, "disconnected");
+	(void) aa_unpack_str(e, &profile->disconnected, "disconnected");
 
 	/* per profile debug flags (complain, audit) */
-	if (!unpack_nameX(e, AA_STRUCT, "flags")) {
+	if (!aa_unpack_nameX(e, AA_STRUCT, "flags")) {
 		info = "profile missing flags";
 		goto fail;
 	}
 	info = "failed to unpack profile flags";
-	if (!unpack_u32(e, &tmp, NULL))
+	if (!aa_unpack_u32(e, &tmp, NULL))
 		goto fail;
 	if (tmp & PACKED_FLAG_HAT)
 		profile->label.flags |= FLAG_HAT;
···
 		profile->label.flags |= FLAG_DEBUG1;
 	if (tmp & PACKED_FLAG_DEBUG2)
 		profile->label.flags |= FLAG_DEBUG2;
-	if (!unpack_u32(e, &tmp, NULL))
+	if (!aa_unpack_u32(e, &tmp, NULL))
 		goto fail;
 	if (tmp == PACKED_MODE_COMPLAIN || (e->version & FORCE_COMPLAIN_FLAG)) {
 		profile->mode = APPARMOR_COMPLAIN;
···
 	} else {
 		goto fail;
 	}
-	if (!unpack_u32(e, &tmp, NULL))
+	if (!aa_unpack_u32(e, &tmp, NULL))
 		goto fail;
 	if (tmp)
 		profile->audit = AUDIT_ALL;
 
-	if (!unpack_nameX(e, AA_STRUCTEND, NULL))
+	if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL))
 		goto fail;
 
 	/* path_flags is optional */
-	if (unpack_u32(e, &profile->path_flags, "path_flags"))
+	if (aa_unpack_u32(e, &profile->path_flags, "path_flags"))
 		profile->path_flags |= profile->label.flags &
 			PATH_MEDIATE_DELETED;
 	else
···
 		profile->path_flags = PATH_MEDIATE_DELETED;
 
 	info = "failed to unpack profile capabilities";
-	if (!unpack_u32(e, &(profile->caps.allow.cap[0]), NULL))
+	if (!aa_unpack_u32(e, &(profile->caps.allow.cap[0]), NULL))
 		goto fail;
-	if (!unpack_u32(e, &(profile->caps.audit.cap[0]), NULL))
+	if (!aa_unpack_u32(e, &(profile->caps.audit.cap[0]), NULL))
 		goto fail;
-	if (!unpack_u32(e, &(profile->caps.quiet.cap[0]), NULL))
+	if (!aa_unpack_u32(e, &(profile->caps.quiet.cap[0]), NULL))
 		goto fail;
-	if (!unpack_u32(e, &tmpcap.cap[0], NULL))
+	if (!aa_unpack_u32(e, &tmpcap.cap[0], NULL))
 		goto fail;
 
 	info = "failed to unpack upper profile capabilities";
-	if (unpack_nameX(e, AA_STRUCT, "caps64")) {
+	if (aa_unpack_nameX(e, AA_STRUCT, "caps64")) {
 		/* optional upper half of 64 bit caps */
-		if (!unpack_u32(e, &(profile->caps.allow.cap[1]), NULL))
+		if (!aa_unpack_u32(e, &(profile->caps.allow.cap[1]), NULL))
 			goto fail;
-		if (!unpack_u32(e, &(profile->caps.audit.cap[1]), NULL))
+		if (!aa_unpack_u32(e, &(profile->caps.audit.cap[1]), NULL))
 			goto fail;
-		if (!unpack_u32(e, &(profile->caps.quiet.cap[1]), NULL))
+		if (!aa_unpack_u32(e, &(profile->caps.quiet.cap[1]), NULL))
 			goto fail;
-		if (!unpack_u32(e, &(tmpcap.cap[1]), NULL))
+		if (!aa_unpack_u32(e, &(tmpcap.cap[1]), NULL))
 			goto fail;
-		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
+		if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL))
 			goto fail;
 	}
 
 	info = "failed to unpack extended profile capabilities";
-	if (unpack_nameX(e, AA_STRUCT, "capsx")) {
+	if (aa_unpack_nameX(e, AA_STRUCT, "capsx")) {
 		/* optional extended caps mediation mask */
-		if (!unpack_u32(e, &(profile->caps.extended.cap[0]), NULL))
+		if (!aa_unpack_u32(e, &(profile->caps.extended.cap[0]), NULL))
 			goto fail;
-		if (!unpack_u32(e, &(profile->caps.extended.cap[1]), NULL))
+		if (!aa_unpack_u32(e, &(profile->caps.extended.cap[1]), NULL))
 			goto fail;
-		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
+		if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL))
 			goto fail;
 	}
 
···
 		goto fail;
 	}
 
-	if (unpack_nameX(e, AA_STRUCT, "policydb")) {
+	if (aa_unpack_nameX(e, AA_STRUCT, "policydb")) {
 		/* generic policy dfa - optional and may be NULL */
 		info = "failed to unpack policydb";
 		profile->policy.dfa = unpack_dfa(e);
···
 			error = -EPROTO;
 			goto fail;
 		}
-		if (!unpack_u32(e, &profile->policy.start[0], "start"))
+		if (!aa_unpack_u32(e, &profile->policy.start[0], "start"))
 			/* default start state */
 			profile->policy.start[0] = DFA_START;
 		/* setup class index */
···
 					    profile->policy.start[0],
 					    i);
 		}
-		if (!unpack_nameX(e, AA_STRUCTEND, NULL))
+		if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL))
 			goto fail;
 	} else
 		profile->policy.dfa = aa_get_dfa(nulldfa);
···
 		info = "failed to unpack profile file rules";
 		goto fail;
 	} else if (profile->file.dfa) {
-		if (!unpack_u32(e, &profile->file.start, "dfa_start"))
+		if (!aa_unpack_u32(e, &profile->file.start, "dfa_start"))
 			/* default start state */
 			profile->file.start = DFA_START;
 	} else if (profile->policy.dfa &&
···
 		goto fail;
 	}
 
-	if (unpack_nameX(e, AA_STRUCT, "data")) {
+	if (aa_unpack_nameX(e, AA_STRUCT, "data")) {
 		info = "out of memory";
 		profile->data = kzalloc(sizeof(*profile->data), GFP_KERNEL);
 		if (!profile->data)
···
 			goto fail;
 		}
 
-		while (unpack_strdup(e, &key, NULL)) {
+		while (aa_unpack_strdup(e, &key, NULL)) {
 			data = kzalloc(sizeof(*data), GFP_KERNEL);
 			if (!data) {
 				kfree_sensitive(key);
···
 			}
 
 			data->key = key;
-			data->size = unpack_blob(e, &data->data, NULL);
+			data->size = aa_unpack_blob(e, &data->data, NULL);
 			data->data = kvmemdup(data->data, data->size);
 			if (data->size && !data->data) {
 				kfree_sensitive(data->key);
···
 					       profile->data->p);
 		}
 
-		if (!unpack_nameX(e, AA_STRUCTEND, NULL)) {
+		if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL)) {
 			info = "failed to unpack end of key, value data table";
 			goto fail;
 		}
 	}
 
-	if (!unpack_nameX(e, AA_STRUCTEND, NULL)) {
+	if (!aa_unpack_nameX(e, AA_STRUCTEND, NULL)) {
 		info = "failed to unpack end of profile";
 		goto fail;
 	}
···
 	*ns = NULL;
 
 	/* get the interface version */
-	if (!unpack_u32(e, &e->version, "version")) {
+	if (!aa_unpack_u32(e, &e->version, "version")) {
 		if (required) {
 			audit_iface(NULL, NULL, NULL, "invalid profile format",
 				    e, error);
···
 	}
 
 	/* read the namespace if present */
-	if (unpack_str(e, &name, "namespace")) {
+	if (aa_unpack_str(e, &name, "namespace")) {
 		if (*name == '\0') {
 			audit_iface(NULL, NULL, NULL, "invalid namespace name",
 				    e, error);
···
 
 	return error;
 }
-
-#ifdef CONFIG_SECURITY_APPARMOR_KUNIT_TEST
-#include "policy_unpack_test.c"
-#endif /* CONFIG_SECURITY_APPARMOR_KUNIT_TEST */

security/apparmor/policy_unpack_test.c

···
  */
 
 #include <kunit/test.h>
+#include <kunit/visibility.h>
 
 #include "include/policy.h"
 #include "include/policy_unpack.h"
···
 	(TEST_BLOB_BUF_OFFSET + 5 + TEST_BLOB_DATA_SIZE)
 #define TEST_ARRAY_BUF_OFFSET \
 	(TEST_NAMED_ARRAY_BUF_OFFSET + 3 + strlen(TEST_ARRAY_NAME) + 1)
+
+MODULE_IMPORT_NS(EXPORTED_FOR_KUNIT_TESTING);
 
 struct policy_unpack_fixture {
 	struct aa_ext *e;
···
 {
 	struct policy_unpack_fixture *puf = test->priv;
 
-	KUNIT_EXPECT_TRUE(test, inbounds(puf->e, 0));
-	KUNIT_EXPECT_TRUE(test, inbounds(puf->e, puf->e_size / 2));
-	KUNIT_EXPECT_TRUE(test, inbounds(puf->e, puf->e_size));
+	KUNIT_EXPECT_TRUE(test, aa_inbounds(puf->e, 0));
+	KUNIT_EXPECT_TRUE(test, aa_inbounds(puf->e, puf->e_size / 2));
+	KUNIT_EXPECT_TRUE(test, aa_inbounds(puf->e, puf->e_size));
 }
 
 static void policy_unpack_test_inbounds_when_out_of_bounds(struct kunit *test)
 {
 	struct policy_unpack_fixture *puf = test->priv;
 
-	KUNIT_EXPECT_FALSE(test, inbounds(puf->e, puf->e_size + 1));
+	KUNIT_EXPECT_FALSE(test, aa_inbounds(puf->e, puf->e_size + 1));
 }
 
 static void policy_unpack_test_unpack_array_with_null_name(struct kunit *test)
···
 
 	puf->e->pos += TEST_ARRAY_BUF_OFFSET;
 
-	array_size = unpack_array(puf->e, NULL);
+	array_size = aa_unpack_array(puf->e, NULL);
 
 	KUNIT_EXPECT_EQ(test, array_size, (u16)TEST_ARRAY_SIZE);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos,
···
 
 	puf->e->pos += TEST_NAMED_ARRAY_BUF_OFFSET;
 
-	array_size = unpack_array(puf->e, name);
+	array_size = aa_unpack_array(puf->e, name);
 
 	KUNIT_EXPECT_EQ(test, array_size, (u16)TEST_ARRAY_SIZE);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos,
···
 	puf->e->pos += TEST_NAMED_ARRAY_BUF_OFFSET;
 	puf->e->end = puf->e->start + TEST_ARRAY_BUF_OFFSET + sizeof(u16);
 
-	array_size = unpack_array(puf->e, name);
+	array_size = aa_unpack_array(puf->e, name);
 
 	KUNIT_EXPECT_EQ(test, array_size, 0);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos,
···
 	size_t size;
 
 	puf->e->pos += TEST_BLOB_BUF_OFFSET;
-	size = unpack_blob(puf->e, &blob, NULL);
+	size = aa_unpack_blob(puf->e, &blob, NULL);
 
 	KUNIT_ASSERT_EQ(test, size, TEST_BLOB_DATA_SIZE);
 	KUNIT_EXPECT_TRUE(test,
···
 	size_t size;
 
 	puf->e->pos += TEST_NAMED_BLOB_BUF_OFFSET;
-	size = unpack_blob(puf->e, &blob, TEST_BLOB_NAME);
+	size = aa_unpack_blob(puf->e, &blob, TEST_BLOB_NAME);
 
 	KUNIT_ASSERT_EQ(test, size, TEST_BLOB_DATA_SIZE);
 	KUNIT_EXPECT_TRUE(test,
···
 	puf->e->end = puf->e->start + TEST_BLOB_BUF_OFFSET
 		+ TEST_BLOB_DATA_SIZE - 1;
 
-	size = unpack_blob(puf->e, &blob, TEST_BLOB_NAME);
+	size = aa_unpack_blob(puf->e, &blob, TEST_BLOB_NAME);
 
 	KUNIT_EXPECT_EQ(test, size, 0);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos, start);
···
 	size_t size;
 
 	puf->e->pos += TEST_STRING_BUF_OFFSET;
-	size = unpack_str(puf->e, &string, NULL);
+	size = aa_unpack_str(puf->e, &string, NULL);
 
 	KUNIT_EXPECT_EQ(test, size, strlen(TEST_STRING_DATA) + 1);
 	KUNIT_EXPECT_STREQ(test, string, TEST_STRING_DATA);
···
 	const char *string = NULL;
 	size_t size;
 
-	size = unpack_str(puf->e, &string, TEST_STRING_NAME);
+	size = aa_unpack_str(puf->e, &string, TEST_STRING_NAME);
 
 	KUNIT_EXPECT_EQ(test, size, strlen(TEST_STRING_DATA) + 1);
 	KUNIT_EXPECT_STREQ(test, string, TEST_STRING_DATA);
···
 	puf->e->end = puf->e->pos + TEST_STRING_BUF_OFFSET
 		+ strlen(TEST_STRING_DATA) - 1;
 
-	size = unpack_str(puf->e, &string, TEST_STRING_NAME);
+	size = aa_unpack_str(puf->e, &string, TEST_STRING_NAME);
 
 	KUNIT_EXPECT_EQ(test, size, 0);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos, start);
···
 	size_t size;
 
 	puf->e->pos += TEST_STRING_BUF_OFFSET;
-	size = unpack_strdup(puf->e, &string, NULL);
+	size = aa_unpack_strdup(puf->e, &string, NULL);
 
 	KUNIT_EXPECT_EQ(test, size, strlen(TEST_STRING_DATA) + 1);
 	KUNIT_EXPECT_FALSE(test,
···
 	char *string = NULL;
 	size_t size;
 
-	size = unpack_strdup(puf->e, &string, TEST_STRING_NAME);
+	size = aa_unpack_strdup(puf->e, &string, TEST_STRING_NAME);
 
 	KUNIT_EXPECT_EQ(test, size, strlen(TEST_STRING_DATA) + 1);
 	KUNIT_EXPECT_FALSE(test,
···
 	puf->e->end = puf->e->pos + TEST_STRING_BUF_OFFSET
 		+ strlen(TEST_STRING_DATA) - 1;
 
-	size = unpack_strdup(puf->e, &string, TEST_STRING_NAME);
+	size = aa_unpack_strdup(puf->e, &string, TEST_STRING_NAME);
 
 	KUNIT_EXPECT_EQ(test, size, 0);
 	KUNIT_EXPECT_NULL(test, string);
···
 
 	puf->e->pos += TEST_U32_BUF_OFFSET;
 
-	success = unpack_nameX(puf->e, AA_U32, NULL);
+	success = aa_unpack_nameX(puf->e, AA_U32, NULL);
 
 	KUNIT_EXPECT_TRUE(test, success);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos,
···
 
 	puf->e->pos += TEST_U32_BUF_OFFSET;
 
-	success = unpack_nameX(puf->e, AA_BLOB, NULL);
+	success = aa_unpack_nameX(puf->e, AA_BLOB, NULL);
 
 	KUNIT_EXPECT_FALSE(test, success);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos,
···
 
 	puf->e->pos += TEST_NAMED_U32_BUF_OFFSET;
 
-	success = unpack_nameX(puf->e, AA_U32, name);
+	success = aa_unpack_nameX(puf->e, AA_U32, name);
 
 	KUNIT_EXPECT_TRUE(test, success);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos,
···
 
 	puf->e->pos += TEST_NAMED_U32_BUF_OFFSET;
 
-	success = unpack_nameX(puf->e, AA_U32, name);
+	success = aa_unpack_nameX(puf->e, AA_U32, name);
 
 	KUNIT_EXPECT_FALSE(test, success);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos,
···
 	 */
 	puf->e->end += TEST_U16_DATA;
 
-	size = unpack_u16_chunk(puf->e, &chunk);
+	size = aa_unpack_u16_chunk(puf->e, &chunk);
 
 	KUNIT_EXPECT_PTR_EQ(test, chunk,
 			    puf->e->start + TEST_U16_OFFSET + 2);
···
 
 	puf->e->pos = puf->e->end - 1;
 
-	size = unpack_u16_chunk(puf->e, &chunk);
+	size = aa_unpack_u16_chunk(puf->e, &chunk);
 
 	KUNIT_EXPECT_EQ(test, size, 0);
 	KUNIT_EXPECT_NULL(test, chunk);
···
 	 */
 	puf->e->end = puf->e->pos + TEST_U16_DATA - 1;
 
-	size = unpack_u16_chunk(puf->e, &chunk);
+	size = aa_unpack_u16_chunk(puf->e, &chunk);
 
 	KUNIT_EXPECT_EQ(test, size, 0);
 	KUNIT_EXPECT_NULL(test, chunk);
···
 
 	puf->e->pos += TEST_U32_BUF_OFFSET;
 
-	success = unpack_u32(puf->e, &data, NULL);
+	success = aa_unpack_u32(puf->e, &data, NULL);
 
 	KUNIT_EXPECT_TRUE(test, success);
 	KUNIT_EXPECT_EQ(test, data, TEST_U32_DATA);
···
 
 	puf->e->pos += TEST_NAMED_U32_BUF_OFFSET;
 
-	success = unpack_u32(puf->e, &data, name);
+	success = aa_unpack_u32(puf->e, &data, name);
 
 	KUNIT_EXPECT_TRUE(test, success);
 	KUNIT_EXPECT_EQ(test, data, TEST_U32_DATA);
···
 	puf->e->pos += TEST_NAMED_U32_BUF_OFFSET;
 	puf->e->end = puf->e->start + TEST_U32_BUF_OFFSET + sizeof(u32);
 
-	success = unpack_u32(puf->e, &data, name);
+	success = aa_unpack_u32(puf->e, &data, name);
 
 	KUNIT_EXPECT_FALSE(test, success);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos,
···
 
 	puf->e->pos += TEST_U64_BUF_OFFSET;
 
-	success = unpack_u64(puf->e, &data, NULL);
+	success = aa_unpack_u64(puf->e, &data, NULL);
 
 	KUNIT_EXPECT_TRUE(test, success);
 	KUNIT_EXPECT_EQ(test, data, TEST_U64_DATA);
···
 
 	puf->e->pos += TEST_NAMED_U64_BUF_OFFSET;
 
-	success = unpack_u64(puf->e, &data, name);
+	success = aa_unpack_u64(puf->e, &data, name);
 
 	KUNIT_EXPECT_TRUE(test, success);
 	KUNIT_EXPECT_EQ(test, data, TEST_U64_DATA);
···
 	puf->e->pos += TEST_NAMED_U64_BUF_OFFSET;
 	puf->e->end = puf->e->start + TEST_U64_BUF_OFFSET + sizeof(u64);
 
-	success = unpack_u64(puf->e, &data, name);
+	success = aa_unpack_u64(puf->e, &data, name);
 
 	KUNIT_EXPECT_FALSE(test, success);
 	KUNIT_EXPECT_PTR_EQ(test, puf->e->pos,
···
 static void policy_unpack_test_unpack_X_code_match(struct kunit *test)
 {
 	struct policy_unpack_fixture *puf = test->priv;
-	bool success = unpack_X(puf->e, AA_NAME);
+	bool success = aa_unpack_X(puf->e, AA_NAME);
 
 	KUNIT_EXPECT_TRUE(test, success);
 	KUNIT_EXPECT_TRUE(test, puf->e->pos == puf->e->start + 1);
···
 static void policy_unpack_test_unpack_X_code_mismatch(struct kunit *test)
 {
 	struct policy_unpack_fixture *puf = test->priv;
-	bool success = unpack_X(puf->e, AA_STRING);
+	bool success = aa_unpack_X(puf->e, AA_STRING);
 
 	KUNIT_EXPECT_FALSE(test, success);
 	KUNIT_EXPECT_TRUE(test, puf->e->pos == puf->e->start);
···
 	bool success;
 
 	puf->e->pos = puf->e->end;
-	success = unpack_X(puf->e, AA_NAME);
+	success = aa_unpack_X(puf->e, AA_NAME);
 
 	KUNIT_EXPECT_FALSE(test, success);
 }
···
 };
 
 kunit_test_suite(apparmor_policy_unpack_test_module);
+
+MODULE_LICENSE("GPL");

tools/testing/kunit/kunit.py

···
 def parse_tests(request: KunitParseRequest, metadata: kunit_json.Metadata, input_data: Iterable[str]) -> Tuple[KunitResult, kunit_parser.Test]:
 	parse_start = time.time()
 
-	test_result = kunit_parser.Test()
-
 	if request.raw_output:
 		# Treat unparsed results as one passing test.
-		test_result.status = kunit_parser.TestStatus.SUCCESS
-		test_result.counts.passed = 1
+		fake_test = kunit_parser.Test()
+		fake_test.status = kunit_parser.TestStatus.SUCCESS
+		fake_test.counts.passed = 1
 
 		output: Iterable[str] = input_data
 		if request.raw_output == 'all':
 			pass
 		elif request.raw_output == 'kunit':
-			output = kunit_parser.extract_tap_lines(output, lstrip=False)
+			output = kunit_parser.extract_tap_lines(output)
 		for line in output:
 			print(line.rstrip())
+		parse_time = time.time() - parse_start
+		return KunitResult(KunitStatus.SUCCESS, parse_time), fake_test
 
-	else:
-		test_result = kunit_parser.parse_run_tests(input_data)
-	parse_end = time.time()
+
+	# Actually parse the test results.
+	test = kunit_parser.parse_run_tests(input_data)
+	parse_time = time.time() - parse_start
 
 	if request.json:
 		json_str = kunit_json.get_json_result(
-					test=test_result,
+					test=test,
 					metadata=metadata)
 		if request.json == 'stdout':
 			print(json_str)
···
 			stdout.print_with_timestamp("Test results stored in %s" %
 				os.path.abspath(request.json))
 
-	if test_result.status != kunit_parser.TestStatus.SUCCESS:
-		return KunitResult(KunitStatus.TEST_FAILURE, parse_end - parse_start), test_result
+	if test.status != kunit_parser.TestStatus.SUCCESS:
+		return KunitResult(KunitStatus.TEST_FAILURE, parse_time), test
 
-	return KunitResult(KunitStatus.SUCCESS, parse_end - parse_start), test_result
+	return KunitResult(KunitStatus.SUCCESS, parse_time), test
 
 def run_tests(linux: kunit_kernel.LinuxSourceTree,
 	      request: KunitRequest) -> KunitResult:
···
 			    choices=['suite', 'test'])
 
 def add_parse_opts(parser) -> None:
-	parser.add_argument('--raw_output', help='If set don\'t format output from kernel. '
-			    'If set to --raw_output=kunit, filters to just KUnit output.',
+	parser.add_argument('--raw_output', help='If set don\'t parse output from kernel. '
+			    'By default, filters to just KUnit output. Use '
+			    '--raw_output=all to show everything',
 			     type=str, nargs='?', const='all', default=None, choices=['all', 'kunit'])
 	parser.add_argument('--json',
 			    nargs='?',
-			    help='Stores test results in a JSON, and either '
-			    'prints to stdout or saves to file if a '
-			    'filename is specified',
+			    help='Prints parsed test results as JSON to stdout or a file if '
+			    'a filename is specified. Does nothing if --raw_output is set.',
 			    type=str, const='stdout', default=None, metavar='FILE')
 
 

tools/testing/kunit/kunit_parser.py

···
 # Author: Rae Moar <[e-mail]>
 
 from __future__ import annotations
+from dataclasses import dataclass
 import re
 import sys
+import textwrap
 
 from enum import Enum, auto
 from typing import Iterable, Iterator, List, Optional, Tuple
···
 		self.counts.errors += 1
 		stdout.print_with_timestamp(stdout.red('[ERROR]') + f' Test: {self.name}: {error_message}')
 
+	def ok_status(self) -> bool:
+		"""Returns true if the status was ok, i.e. passed or skipped."""
+		return self.status in (TestStatus.SUCCESS, TestStatus.SKIPPED)
+
 class TestStatus(Enum):
 	"""An enumeration class to represent the status of a test."""
 	SUCCESS = auto()
···
 	NO_TESTS = auto()
 	FAILURE_TO_PARSE_TESTS = auto()
 
+@dataclass
 class TestCounts:
 	"""
 	Tracks the counts of statuses of all test cases and any errors within
 	a Test.
-
-	Attributes:
-	passed : int - the number of tests that have passed
-	failed : int - the number of tests that have failed
-	crashed : int - the number of tests that have crashed
-	skipped : int - the number of tests that have skipped
-	errors : int - the number of errors in the test and subtests
 	"""
-	def __init__(self):
-		"""Creates TestCounts object with counts of all test
-		statuses and test errors set to 0.
-		"""
-		self.passed = 0
-		self.failed = 0
-		self.crashed = 0
-		self.skipped = 0
-		self.errors = 0
+	passed: int = 0
+	failed: int = 0
+	crashed: int = 0
+	skipped: int = 0
+	errors: int = 0
 
 	def __str__(self) -> str:
 		"""Returns the string representation of a TestCounts object."""
···
 
 # Parsing helper methods:
 
-KTAP_START = re.compile(r'KTAP version ([0-9]+)$')
-TAP_START = re.compile(r'TAP version ([0-9]+)$')
-KTAP_END = re.compile('(List of all partitions:|'
+KTAP_START = re.compile(r'\s*KTAP version ([0-9]+)$')
+TAP_START = re.compile(r'\s*TAP version ([0-9]+)$')
+KTAP_END = re.compile(r'\s*(List of all partitions:|'
 	'Kernel panic - not syncing: VFS:|reboot: System halted)')
 
-def extract_tap_lines(kernel_output: Iterable[str], lstrip=True) -> LineStream:
+def extract_tap_lines(kernel_output: Iterable[str]) -> LineStream:
 	"""Extracts KTAP lines from the kernel output."""
 	def isolate_ktap_output(kernel_output: Iterable[str]) \
 			-> Iterator[Tuple[int, str]]:
···
 				# stop extracting KTAP lines
 				break
 			elif started:
-				# remove the prefix and optionally any leading
-				# whitespace. Our parsing logic relies on this.
+				# remove the prefix, if any.
 				line = line[prefix_len:]
-				if lstrip:
-					line = line.lstrip()
 				yield line_num, line
 	return LineStream(lines=isolate_ktap_output(kernel_output))
 
···
 		check_version(version_num, TAP_VERSIONS, 'TAP', test)
 	else:
 		return False
-	test.log.append(lines.pop())
+	lines.pop()
 	return True
 
-TEST_HEADER = re.compile(r'^# Subtest: (.*)$')
+TEST_HEADER = re.compile(r'^\s*# Subtest: (.*)$')
 
 def parse_test_header(lines: LineStream, test: Test) -> bool:
 	"""
···
 	match = TEST_HEADER.match(lines.peek())
 	if not match:
 		return False
-	test.log.append(lines.pop())
 	test.name = match.group(1)
+	lines.pop()
 	return True
 
-TEST_PLAN = re.compile(r'1\.\.([0-9]+)')
+TEST_PLAN = re.compile(r'^\s*1\.\.([0-9]+)')
 
 def parse_test_plan(lines: LineStream, test: Test) -> bool:
 	"""
···
 	if not match:
 		test.expected_count = None
 		return False
-	test.log.append(lines.pop())
 	expected_count = int(match.group(1))
 	test.expected_count = expected_count
+	lines.pop()
 	return True
 
-TEST_RESULT = re.compile(r'^(ok|not ok) ([0-9]+) (- )?([^#]*)( # .*)?$')
+TEST_RESULT = re.compile(r'^\s*(ok|not ok) ([0-9]+) (- )?([^#]*)( # .*)?$')
 
-TEST_RESULT_SKIP = re.compile(r'^(ok|not ok) ([0-9]+) (- )?(.*) # SKIP(.*)$')
+TEST_RESULT_SKIP = re.compile(r'^\s*(ok|not ok) ([0-9]+) (- )?(.*) # SKIP(.*)$')
 
 def peek_test_name_match(lines: LineStream, test: Test) -> bool:
 	"""
···
 	# Check if line matches test result line format
 	if not match:
 		return False
-	test.log.append(lines.pop())
+	lines.pop()
 
 	# Set name of test object
 	if skip_match:
···
 	- '# Subtest: [test name]'
 	- '[ok|not ok] [test number] [-] [test name] [optional skip
 		directive]'
+	- 'KTAP version [version number]'
 
 	Parameters:
 	lines - LineStream of KTAP output to parse
···
 	Log of diagnostic lines
 	"""
 	log = []  # type: List[str]
-	while lines and not TEST_RESULT.match(lines.peek()) and not \
-			TEST_HEADER.match(lines.peek()):
+	non_diagnostic_lines = [TEST_RESULT, TEST_HEADER, KTAP_START]
+	while lines and not any(re.match(lines.peek())
+			for re in non_diagnostic_lines):
 		log.append(lines.pop())
 	return log
 
···
 	test - Test object representing current test being printed
 	"""
 	message = test.name
+	if message != "":
+		# Add a leading space before the subtest counts only if a test name
+		# is provided using a "# Subtest" header line.
+		message += " "
 	if test.expected_count:
 		if test.expected_count == 1:
-			message += ' (1 subtest)'
+			message += '(1 subtest)'
 		else:
-			message += f' ({test.expected_count} subtests)'
+			message += f'({test.expected_count} subtests)'
 	stdout.print_with_timestamp(format_test_divider(message, len(message)))
 
 def print_log(log: Iterable[str]) -> None:
 	"""Prints all strings in saved log for test in yellow."""
-	for m in log:
-		stdout.print_with_timestamp(stdout.yellow(m))
+	formatted = textwrap.dedent('\n'.join(log))
+	for line in formatted.splitlines():
+		stdout.print_with_timestamp(stdout.yellow(line))
 
 def format_test_result(test: Test) -> str:
 	"""
···
 	stdout.print_with_timestamp(format_test_divider(message,
 		len(message) - stdout.color_len()))
 
+
+
+def _summarize_failed_tests(test: Test) -> str:
+	"""Tries to summarize all the failing subtests in `test`."""
+
+	def failed_names(test: Test, parent_name: str) -> List[str]:
+		# Note: we use 'main' internally for the top-level test.
+		if not parent_name or parent_name == 'main':
+			full_name = test.name
+		else:
+			full_name = parent_name + '.' + test.name
+
+		if not test.subtests:  # this is a leaf node
+			return [full_name]
+
+		# If all the children failed, just say this subtest failed.
+		# Don't summarize it down "the top-level test failed", though.
+		failed_subtests = [sub for sub in test.subtests if not sub.ok_status()]
+		if parent_name and len(failed_subtests) ==  len(test.subtests):
+			return [full_name]
+
+		all_failures = []  # type: List[str]
+		for t in failed_subtests:
+			all_failures.extend(failed_names(t, full_name))
+		return all_failures
+
+	failures = failed_names(test, '')
+	# If there are too many failures, printing them out will just be noisy.
+	if len(failures) > 10:  # this is an arbitrary limit
+		return ''
+
+	return 'Failures: ' + ', '.join(failures)
+
+
 def print_summary_line(test: Test) -> None:
 	"""
 	Prints summary line of test object. Color of line is dependent on
···
 	else:
 		color = stdout.red
 	stdout.print_with_timestamp(color(f'Testing complete. {test.counts}'))
+
+	# Summarize failures that might have gone off-screen since we had a lot
+	# of tests (arbitrarily defined as >=100 for now).
+	if test.ok_status() or test.counts.total() < 100:
+		return
+	summarized = _summarize_failed_tests(test)
+	if not summarized:
+		return
+	stdout.print_with_timestamp(color(summarized))
 
 # Other methods:
 
···
 	elif test.counts.get_status() == TestStatus.TEST_CRASHED:
 		test.status = TestStatus.TEST_CRASHED
 
-def parse_test(lines: LineStream, expected_num: int, log: List[str]) -> Test:
+def parse_test(lines: LineStream, expected_num: int, log: List[str], is_subtest: bool) -> Test:
 	"""
 	Finds next test to parse in LineStream, creates new Test object,
 	parses any subtests of the test, populates Test object with all
···
 	1..4
 	[subtests]
 
-	- Subtest header line
+	- Subtest header (must include either the KTAP version line or
+	  "# Subtest" header line)
 
-	Example:
+	Example (preferred format with both KTAP version line and
+	"# Subtest" line):
+
+	KTAP version 1
+	# Subtest: name
+	1..3
+	[subtests]
+	ok 1 name
+
+	Example (only "# Subtest" line):
 
 	# Subtest: name
+	1..3
+	[subtests]
+	ok 1 name
+
+	Example (only KTAP version line, compliant with KTAP v1 spec):
+
+	KTAP version 1
 	1..3
 	[subtests]
 	ok 1 name
···
 	expected_num - expected test number for test to be parsed
 	log - list of strings containing any preceding diagnostic lines
 		corresponding to the current test
+	is_subtest - boolean indicating whether test is a subtest
 
 	Return:
 	Test object populated with characteristics and any subtests
 	"""
 	test = Test()
 	test.log.extend(log)
-	parent_test = False
-	main = parse_ktap_header(lines, test)
-	if main:
-		# If KTAP/TAP header is found, attempt to parse
+	if not is_subtest:
+		# If parsing the main/top-level test, parse KTAP version line and
 		# test plan
 		test.name = "main"
+		ktap_line = parse_ktap_header(lines, test)
 		parse_test_plan(lines, test)
 		parent_test = True
 	else:
-		# If KTAP/TAP header is not found, test must be subtest
-		# header or test result line so parse attempt to parser
-		# subtest header
-		parent_test = parse_test_header(lines, test)
+		# If not the main test, attempt to parse a test header containing
+		# the KTAP version line and/or subtest header line
+		ktap_line = parse_ktap_header(lines, test)
+		subtest_line = parse_test_header(lines, test)
+		parent_test = (ktap_line or subtest_line)
 		if parent_test:
-			# If subtest header is found, attempt to parse
-			# test plan and print header
+			# If KTAP version line and/or subtest header is found, attempt
+			# to parse test plan and print test header
 			parse_test_plan(lines, test)
 			print_test_header(test)
 	expected_count = test.expected_count
···
 		sub_log = parse_diagnostic(lines)
 		sub_test = Test()
 		if not lines or (peek_test_name_match(lines, test) and
-				not main):
+				is_subtest):
 			if expected_count and test_num <= expected_count:
 				# If parser reaches end of test before
 				# parsing expected number of subtests, print
···
 				test.log.extend(sub_log)
 				break
 		else:
-			sub_test = parse_test(lines, test_num, sub_log)
+			sub_test = parse_test(lines, test_num, sub_log, True)
 		subtests.append(sub_test)
 		test_num += 1
 	test.subtests = subtests
-	if not main:
+	if is_subtest:
 		# If not main test, look for test result line
 		test.log.extend(parse_diagnostic(lines))
-		if (parent_test and peek_test_name_match(lines, test)) or \
-				not parent_test:
-			parse_test_result(lines, test, expected_num)
-		else:
+		if test.name != "" and not peek_test_name_match(lines, test):
 			test.add_error('missing subtest result line!')
+		else:
+			parse_test_result(lines, test, expected_num)
 
-	# Check for there being no tests
+	# Check for there being no subtests within parent test
 	if parent_test and len(subtests) == 0:
 		# Don't override a bad status if this test had one reported.
 		# Assumption: no subtests means CRASHED is from Test.__init__()
···
 
 	# Add statuses to TestCounts attribute in Test object
 	bubble_up_test_results(test)
-	if parent_test and not main:
+	if parent_test and is_subtest:
 		# If test has subtests and is not the main test object, print
 		# footer.
 		print_test_footer(test)
-	elif not main:
+	elif is_subtest:
 		print_test_result(test)
 	return test
 
···
 	test = Test()
 	if not lines:
 		test.name = '<missing>'
-		test.add_error('could not find any KTAP output!')
+		test.add_error('Could not find any KTAP output. Did any KUnit tests run?')
 		test.status = TestStatus.FAILURE_TO_PARSE_TESTS
 	else:
-		test = parse_test(lines, 0, [])
+		test = parse_test(lines, 0, [], False)
 		if test.status != TestStatus.NO_TESTS:
 			test.status = test.counts.get_status()
 	stdout.print_with_timestamp(DIVIDER)

tools/testing/kunit/kunit_tool_test.py

···
 		self.assertEqual(actual_kconfig, expected_kconfig)
 
 class KUnitParserTest(unittest.TestCase):
+	def setUp(self):
+		self.print_mock = mock.patch('kunit_printer.Printer.print').start()
+		self.addCleanup(mock.patch.stopall)
+
+	def noPrintCallContains(self, substr: str):
+		for call in self.print_mock.mock_calls:
+			self.assertNotIn(substr, call.args[0])
 
 	def assertContains(self, needle: str, haystack: kunit_parser.LineStream):
 		# Clone the iterator so we can print the contents on failure.
···
 		all_passed_log = test_data_path('test_is_test_passed-all_passed.log')
 		with open(all_passed_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_parse_successful_nested_tests_log(self):
 		all_passed_log = test_data_path('test_is_test_passed-all_passed_nested.log')
 		with open(all_passed_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_kselftest_nested(self):
 		kselftest_log = test_data_path('test_is_test_passed-kselftest.log')
 		with open(kselftest_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_parse_failed_test_log(self):
 		failed_log = test_data_path('test_is_test_passed-failure.log')
 		with open(failed_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-		self.assertEqual(
-			kunit_parser.TestStatus.FAILURE,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_no_header(self):
 		empty_log = test_data_path('test_is_test_passed-no_tests_run_no_header.log')
···
 			result = kunit_parser.parse_run_tests(
 				kunit_parser.extract_tap_lines(file.readlines()))
 		self.assertEqual(0, len(result.subtests))
-		self.assertEqual(
-			kunit_parser.TestStatus.FAILURE_TO_PARSE_TESTS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.FAILURE_TO_PARSE_TESTS, result.status)
+		self.assertEqual(result.counts.errors, 1)
 
 	def test_missing_test_plan(self):
 		missing_plan_log = test_data_path('test_is_test_passed-'
···
 				kunit_parser.extract_tap_lines(
 				file.readlines()))
 		# A missing test plan is not an error.
-		self.assertEqual(0, result.counts.errors)
-		# All tests should be accounted for.
-		self.assertEqual(10, result.counts.total())
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(result.counts, kunit_parser.TestCounts(passed=10, errors=0))
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
 
 	def test_no_tests(self):
 		header_log = test_data_path('test_is_test_passed-no_tests_run_with_header.log')
···
 			result = kunit_parser.parse_run_tests(
 				kunit_parser.extract_tap_lines(file.readlines()))
 		self.assertEqual(0, len(result.subtests))
-		self.assertEqual(
-			kunit_parser.TestStatus.NO_TESTS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.NO_TESTS, result.status)
+		self.assertEqual(result.counts.errors, 1)
 
 	def test_no_tests_no_plan(self):
 		no_plan_log = test_data_path('test_is_test_passed-no_tests_no_plan.log')
···
 		self.assertEqual(
 			kunit_parser.TestStatus.NO_TESTS,
 			result.subtests[0].subtests[0].status)
-		self.assertEqual(1, result.counts.errors)
+		self.assertEqual(result.counts, kunit_parser.TestCounts(passed=1, errors=1))
 
 
 	def test_no_kunit_output(self):
···
 		with open(crash_log) as file:
 			result = kunit_parser.parse_run_tests(
 				kunit_parser.extract_tap_lines(file.readlines()))
-		print_mock.assert_any_call(StrContains('could not find any KTAP output!'))
+		print_mock.assert_any_call(StrContains('Could not find any KTAP output.'))
 		print_mock.stop()
 		self.assertEqual(0, len(result.subtests))
+		self.assertEqual(result.counts.errors, 1)
 
 	def test_skipped_test(self):
 		skipped_log = test_data_path('test_skip_tests.log')
···
 			result = kunit_parser.parse_run_tests(file.readlines())
 
 		# A skipped test does not fail the whole suite.
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual(result.counts, kunit_parser.TestCounts(passed=4, skipped=1))
 
 	def test_skipped_all_tests(self):
 		skipped_log = test_data_path('test_skip_all_tests.log')
 		with open(skipped_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
 
-		self.assertEqual(
-			kunit_parser.TestStatus.SKIPPED,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SKIPPED, result.status)
+		self.assertEqual(result.counts, kunit_parser.TestCounts(skipped=5))
 
 	def test_ignores_hyphen(self):
 		hyphen_log = test_data_path('test_strip_hyphen.log')
···
 			result = kunit_parser.parse_run_tests(file.readlines())
 
 		# A skipped test does not fail the whole suite.
-		self.assertEqual(
-			kunit_parser.TestStatus.SUCCESS,
-			result.status)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
 		self.assertEqual(
 			"sysctl_test",
 			result.subtests[0].name)
 		self.assertEqual(
 			"example",
 			result.subtests[1].name)
-		file.close()
-
 
 	def test_ignores_prefix_printk_time(self):
 		prefix_log = test_data_path('test_config_printk_time.log')
 		with open(prefix_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_ignores_multiple_prefixes(self):
 		prefix_log = test_data_path('test_multiple_prefixes.log')
 		with open(prefix_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_prefix_mixed_kernel_output(self):
 		mixed_prefix_log = test_data_path('test_interrupted_tap_output.log')
 		with open(mixed_prefix_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_prefix_poundsign(self):
 		pound_log = test_data_path('test_pound_sign.log')
 		with open(pound_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
 
 	def test_kernel_panic_end(self):
 		panic_log = test_data_path('test_kernel_panic_interrupt.log')
 		with open(panic_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.TEST_CRASHED,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.TEST_CRASHED, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertGreaterEqual(result.counts.errors, 1)
 
 	def test_pound_no_prefix(self):
 		pound_log = test_data_path('test_pound_no_prefix.log')
 		with open(pound_log) as file:
 			result = kunit_parser.parse_run_tests(file.readlines())
-			self.assertEqual(
-				kunit_parser.TestStatus.SUCCESS,
-				result.status)
-			self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(kunit_parser.TestStatus.SUCCESS, result.status)
+		self.assertEqual('kunit-resource-test', result.subtests[0].name)
+		self.assertEqual(result.counts.errors, 0)
+
+	def test_summarize_failures(self):
+		output = """
+		KTAP version 1
+		1..2
+			# Subtest: all_failed_suite
+			1..2
+			not ok 1 - test1
+			not ok 2 - test2
+		not ok 1 - all_failed_suite
+			# Subtest: some_failed_suite
+			1..2
+			ok 1 - test1
+			not ok 2 - test2
+		not ok 1 - some_failed_suite
+		"""
+		result = kunit_parser.parse_run_tests(output.splitlines())
+		self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status)
+
+		self.assertEqual(kunit_parser._summarize_failed_tests(result),
+			'Failures: all_failed_suite, some_failed_suite.test2')
+
+	def test_ktap_format(self):
+		ktap_log = test_data_path('test_parse_ktap_output.log')
+		with open(ktap_log) as file:
+			result = kunit_parser.parse_run_tests(file.readlines())
+		self.assertEqual(result.counts, kunit_parser.TestCounts(passed=3))
+		self.assertEqual('suite', result.subtests[0].name)
+		self.assertEqual('case_1', result.subtests[0].subtests[0].name)
+		self.assertEqual('case_2', result.subtests[0].subtests[1].name)
+
+	def test_parse_subtest_header(self):
+		ktap_log = test_data_path('test_parse_subtest_header.log')
+		with open(ktap_log) as file:
+			result = kunit_parser.parse_run_tests(file.readlines())
+		self.print_mock.assert_any_call(StrContains('suite (1 subtest)'))
+
+	def test_show_test_output_on_failure(self):
+		output = """
+		KTAP version 1
+		1..1
+		  Test output.
+		    Indented more.
+		not ok 1 test1
+		"""
+		result = kunit_parser.parse_run_tests(output.splitlines())
+		self.assertEqual(kunit_parser.TestStatus.FAILURE, result.status)
+
+		self.print_mock.assert_any_call(StrContains('Test output.'))
+		self.print_mock.assert_any_call(StrContains('  Indented more.'))
+		self.noPrintCallContains('not ok 1 test1')
 
 def line_stream_from_strs(strs: Iterable[str]) -> kunit_parser.LineStream:
 	return kunit_parser.LineStream(enumerate(strs, start=1))
···
 
 
 class KUnitJsonTest(unittest.TestCase):
+	def setUp(self):
+		self.print_mock = mock.patch('kunit_printer.Printer.print').start()
+		self.addCleanup(mock.patch.stopall)
 
 	def _json_for(self, log_file):
 		with open(test_data_path(log_file)) as file:
···
 		self.assertEqual(e.exception.code, 1)
 		self.assertEqual(self.linux_source_mock.build_reconfig.call_count, 1)
 		self.assertEqual(self.linux_source_mock.run_kernel.call_count, 1)
-		self.print_mock.assert_any_call(StrContains('could not find any KTAP output!'))
+		self.print_mock.assert_any_call(StrContains('Could not find any KTAP output.'))
 
 	def test_exec_no_tests(self):
 		self.linux_source_mock.run_kernel = mock.Mock(return_value=['TAP version 14', '1..0'])

tools/testing/kunit/test_data/test_parse_ktap_output.log

···
+KTAP version 1
+1..1
+  KTAP version 1
+  1..3
+  ok 1 case_1
+  ok 2 case_2
+  ok 3 case_3
+ok 1 suite

tools/testing/kunit/test_data/test_parse_subtest_header.log

···
+KTAP version 1
+1..1
+  KTAP version 1
+  # Subtest: suite
+  1..1
+  ok 1 test
+ok 1 suite