[1.7.x] Fixed #22194 -- Added --list-tags option to check command.

Thanks Elvard for the patch.

Backport of 395d75ea6b from master

1 files changed, 10 insertions, 0 deletions

diff --git a/tests/check_framework/tests.py b/tests/check_framework/tests.py
index c770ee517b..af407f5c7e 100644
--- a/tests/check_framework/tests.py
+++ b/tests/check_framework/tests.py
@@ -194,6 +194,16 @@ class CheckCommandTests(TestCase):
     def test_invalid_tag(self):
         self.assertRaises(CommandError, call_command, 'check', tags=['missingtag'])
 
+    @override_system_checks([simple_system_check])
+    def test_list_tags_empty(self):
+        call_command('check', list_tags=True)
+        self.assertEqual('\n', sys.stdout.getvalue())
+
+    @override_system_checks([tagged_system_check])
+    def test_list_tags(self):
+        call_command('check', list_tags=True)
+        self.assertEqual('simpletag\n', sys.stdout.getvalue())
+
 
 def custom_error_system_check(app_configs, **kwargs):
     return [