micro: refactor tests

- create a directory for holding tests

`packagesFromDirectoryRecursive` is really useful!

- add version test
- rename and rework expect test

pkgs/by-name/mi/micro/package.nix

···
 , makeWrapper
 # Boolean flags
 , withXclip ? stdenv.isLinux
-, withWlclip ? null
 , withWlClipboard ?
   if withWlclip != null then
     lib.warn ''
···
       use withWlClipboard instead.
     '' withWlclip
   else stdenv.isLinux
+# Deprecated options
+# Remove them before or right after next version update from Nixpkgs or this
+# package itself
+, withWlclip ? null
 }:
 
 let
···
         '';
 
     passthru = {
-      tests = {
-        expect = callPackage ./test-with-expect.nix {
-          micro = self;
-        };
+      tests = lib.packagesFromDirectoryRecursive {
+        inherit callPackage;
+        directory = ./tests;
       };
     };
 

pkgs/by-name/mi/micro/test-with-expect.nix

···
-{ micro, expect, runCommand, writeScript }:
-
-let expect-script = writeScript "expect-script" ''
-  #!${expect}/bin/expect -f
-
-  spawn micro file.txt
-  expect "file.txt"
-
-  send "Hello world!"
-  expect "Hello world!"
-
-  # Send ctrl-q (exit)
-  send "\021"
-
-  expect "Save changes to file.txt before closing?"
-  send "y"
-
-  expect eof
-''; in
-runCommand "micro-test-expect"
-{
-  nativeBuildInputs = [ micro expect ];
-  passthru = { inherit expect-script; };
-} ''
-  # Micro really wants a writable $HOME for its config directory.
-  export HOME=$(pwd)
-  expect -f ${expect-script}
-  grep "Hello world!" file.txt
-  touch $out
-''

pkgs/by-name/mi/micro/tests/_001-hello-expect/hello.tcl

···
+spawn micro file.txt
+expect "file.txt"
+
+send "Hello world!"
+expect "Hello world!"
+
+# ctrl-q (exit)
+send "\021"
+
+expect "Save changes to file.txt before closing?"
+send "y"
+
+expect eof

pkgs/by-name/mi/micro/tests/_001-hello-expect/package.nix

···
+{
+  expect,
+  micro,
+  runCommand,
+}:
+
+let
+  expect-script = builtins.path {
+    name = "hello.tcl";
+    path = ./hello.tcl;
+  };
+in
+runCommand "micro-expect-hello-world"
+  {
+    nativeBuildInputs = [
+      expect
+      micro
+    ];
+  }
+  # Micro needs a writable $HOME for throwing its configuration
+  ''
+    export HOME=$(pwd)
+    expect -f ${expect-script}
+    grep "Hello world!" file.txt
+    cat file.txt > $out
+  ''

pkgs/by-name/mi/micro/tests/version.nix

···
+{ micro, testers }:
+
+testers.testVersion {
+  package = micro;
+  command = "micro -version";
+}