Python unittest skip messages on 3.12.2 and later

On Python 3.12.2 and later the message given when no tests are run
was reverted to the pre-3.12.1 era. Sigh.

Let's adapt the nrunner selftest to take that into consideration.

Signed-off-by: Cleber Rosa <[email protected]>

Author: clebergnu

selftests/unit/nrunner.py

@@ -338,18 +338,18 @@ def test_runner_python_unittest_skip(self):
         runner_klass = runnable.pick_runner_class()
         runner = runner_klass()
         results = [status for status in runner.run(runnable)]
-        if sys.version_info < (3, 12, 1):
+        if sys.version_info == (3, 12, 1):
             output1 = (
                 b"----------------------------------------------------------------------\n"
-                b"Ran 1 test in "
+                b"Ran 0 tests in "
             )
-            output2 = b"s\n\nOK (skipped=1)\n"
+            output2 = b"\n\nNO TESTS RAN (skipped=1)\n"
         else:
             output1 = (
                 b"----------------------------------------------------------------------\n"
-                b"Ran 0 tests in "
+                b"Ran 1 test in "
             )
-            output2 = b"\n\nNO TESTS RAN (skipped=1)\n"
+            output2 = b"s\n\nOK (skipped=1)\n"
         output = results[-2]
         result = results[-1]
         self.assertEqual(result["status"], "finished")