Add tests for manage.get_local_test_settings_file

manage.py

@@ -10,15 +10,13 @@ def get_local_test_settings_file(argv):
     local_settings_dir = os.path.split(argv[0])[0]
     assert os.path.isfile(os.path.join(local_settings_dir, "manage.py"))
 
-    from django.core.management.base import CommandParser
+    from django.core.management import CommandParser, CommandError
     parser = CommandParser(None, usage="%(prog)s subcommand [options] [args]",
                            add_help=False)
     parser.add_argument('--local_test_settings',
                         dest="local_test_settings")
-    try:
-        options, args = parser.parse_known_args(argv)
-    except CommandError:
-        raise
+
+    options, args = parser.parse_known_args(argv)
 
     if options.local_test_settings is None:
         local_settings_file = "local_settings_example.py"

tests/test_misc.py

@@ -33,6 +33,7 @@
 from django.utils.formats import date_format, get_format
 from django.utils.dateformat import format
 from django.utils.translation import ugettext_lazy as _
+from django.core.management import CommandError
 
 from course.models import Course
 from course.views import EditCourseForm
@@ -41,6 +42,8 @@
     is_maintenance_mode, render_email_template, get_outbound_mail_connection,
     format_datetime_local)
 
+from manage import get_local_test_settings_file
+
 from tests.base_test_mixins import SingleCourseTestMixin
 from tests.utils import LocmemBackendTestsMixin, mail, mock
 from tests.constants import DATE_TIME_PICKER_TIME_FORMAT
@@ -578,4 +581,43 @@ def test_attribute_error2(self):
 
 # }}}
 
+
+class GetLocalTestSettingsFileTest(unittest.TestCase):
+    """test manage.get_local_test_settings_file"""
+
+    def test_use_default_local_settings_example(self):
+        self.assertEqual(get_local_test_settings_file(
+                ["manage.py", "test", "foo"]), "local_settings_example.py")
+
+    def test_error_use_local_settings(self):
+        """test error when use local_settings.py as test settings"""
+        with self.assertRaises(CommandError) as cm:
+            get_local_test_settings_file(
+                ["manage.py", "test", "--local_test_settings",
+                 "local_settings.py"])
+
+        self.assertIn(
+            "Using production local_settings for tests is not "
+            "allowed due to security reason.", str(cm.exception))
+
+    def test_error_local_test_setting_file_does_not_exist(self):
+        """test error when use local_settings.py as test settings"""
+        invalid_file = "foo/local_test_settings.py"
+        with self.assertRaises(CommandError) as cm:
+            get_local_test_settings_file(
+                ["manage.py", "test", "--local_test_settings",
+                 invalid_file])
+
+        self.assertIn(
+            "file '%s' does not exist" % invalid_file, str(cm.exception))
+
+    def test_custom_local_test_setting_file(self):
+        settings_file = "foo/local_test_settings.py"
+        with mock.patch("os.path.isfile") as mock_is_file:
+            mock_is_file.return_value = True
+            self.assertEqual(get_local_test_settings_file(
+                    ["manage.py", "test", "foo",
+                     "--local_test_settings", settings_file]),
+                settings_file)
+
 # vim: foldmethod=marker