Fixed #32532 -- Made DiscoverRunner raise RuntimeError when a test label is a file path.

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/test_runner/test_discover_runner.py b/tests/test_runner/test_discover_runner.py
index 6b19f2f274..c9105989fa 100644
--- a/tests/test_runner/test_discover_runner.py
+++ b/tests/test_runner/test_discover_runner.py
@@ -47,6 +47,16 @@ class DiscoverRunnerTests(SimpleTestCase):
         ns = parser.parse_args(["--debug-mode"])
         self.assertTrue(ns.debug_mode)
 
+    def test_load_tests_for_label_file_path(self):
+        with change_cwd('.'):
+            msg = (
+                "One of the test labels is a path to a file: "
+                "'test_discover_runner.py', which is not supported. Use a "
+                "dotted module name instead."
+            )
+            with self.assertRaisesMessage(RuntimeError, msg):
+                DiscoverRunner().load_tests_for_label('test_discover_runner.py', {})
+
     def test_dotted_test_module(self):
         count = DiscoverRunner().build_suite(
             ['test_runner_apps.sample.tests_sample'],