python3Packages.bork: add test using `testers.runCommand`

This will serve as a “real-world” example, running tests requiring network.

pkgs/build-support/testers/test/default.nix

···
   shellcheck = pkgs.callPackage ../shellcheck/tests.nix { };
 
   runCommand = lib.recurseIntoAttrs {
+    bork = pkgs.python3Packages.bork.tests.pytest-network;
+
     dns-resolution = testers.runCommand {
       name = "runCommand-dns-resolution-test";
       nativeBuildInputs = [ pkgs.ldns ];

pkgs/development/python-modules/bork/default.nix

···
 {
   lib,
   buildPythonPackage,
+  callPackage,
   fetchFromGitHub,
   pytestCheckHook,
   pythonOlder,
···
     # tries to call python -m bork
     "test_repo"
   ];
+
+  passthru.tests = callPackage ./tests.nix { };
 
   meta = with lib; {
     description = "Python build and release management tool";

pkgs/development/python-modules/bork/tests.nix

···
+{
+  testers,
+
+  bork,
+  cacert,
+  git,
+  pytest,
+}:
+{
+  # a.k.a. `tests.testers.runCommand.bork`
+  pytest-network = testers.runCommand {
+    name = "bork-pytest-network";
+    nativeBuildInputs = [
+      bork
+      cacert
+      git
+      pytest
+    ];
+    script = ''
+      # Copy the source tree over, and make it writeable
+      cp -r ${bork.src} bork/
+      find -type d -exec chmod 0755 '{}' '+'
+
+      pytest -v -m network bork/
+      touch $out
+    '';
+  };
+}