Fixed #30584 -- Fixed management command when using subparsers with dest parameter.

tests/user_commands/tests.py

@@ -15,6 +15,7 @@ from django.db import connection
 from django.test import SimpleTestCase, override_settings
 from django.test.utils import captured_stderr, extend_sys_path
 from django.utils import translation
+from django.utils.version import PY37
 
 from .management.commands import dance
 
@@ -218,10 +219,34 @@ class CommandTests(SimpleTestCase):
         management.call_command('subparser', 'foo', 12, stdout=out)
         self.assertIn('bar', out.getvalue())
 
+    def test_subparser_dest_args(self):
+        out = StringIO()
+        management.call_command('subparser_dest', 'foo', bar=12, stdout=out)
+        self.assertIn('bar', out.getvalue())
+
+    def test_subparser_dest_required_args(self):
+        out = StringIO()
+        management.call_command('subparser_required', 'foo_1', 'foo_2', bar=12, stdout=out)
+        self.assertIn('bar', out.getvalue())
+
     def test_subparser_invalid_option(self):
         msg = "Error: invalid choice: 'test' (choose from 'foo')"
         with self.assertRaisesMessage(CommandError, msg):
             management.call_command('subparser', 'test', 12)
+        if PY37:
+            # "required" option requires Python 3.7 and later.
+            msg = 'Error: the following arguments are required: subcommand'
+            with self.assertRaisesMessage(CommandError, msg):
+                management.call_command('subparser_dest', subcommand='foo', bar=12)
+        else:
+            msg = (
+                'Unknown option(s) for subparser_dest command: subcommand. '
+                'Valid options are: bar, force_color, help, no_color, '
+                'pythonpath, settings, skip_checks, stderr, stdout, '
+                'traceback, verbosity, version.'
+            )
+            with self.assertRaisesMessage(TypeError, msg):
+                management.call_command('subparser_dest', subcommand='foo', bar=12)
 
     def test_create_parser_kwargs(self):
         """BaseCommand.create_parser() passes kwargs to CommandParser."""