Added tests for collectstatic interactivity.

tests/staticfiles_tests/test_management.py

@@ -13,7 +13,7 @@ from django.contrib.staticfiles import storage
 from django.contrib.staticfiles.management.commands import collectstatic
 from django.core.exceptions import ImproperlyConfigured
 from django.core.management import call_command
-from django.test import override_settings
+from django.test import mock, override_settings
 from django.test.utils import extend_sys_path
 from django.utils import six
 from django.utils._os import symlinks_supported
@@ -176,6 +176,40 @@ class TestCollectionClear(CollectionTestCase):
         self.assertFileNotFound('cleared.txt')
 
 
+class TestInteractiveMessages(CollectionTestCase):
+    overwrite_warning_msg = "This will overwrite existing files!"
+    delete_warning_msg = "This will DELETE ALL FILES in this location!"
+
+    @staticmethod
+    def mock_input(stdout):
+        def _input(msg):
+            # Python 2 reads bytes from the console output, use bytes for the StringIO
+            stdout.write(msg.encode('utf-8') if six.PY2 else msg)
+            return 'yes'
+        return _input
+
+    def test_warning_when_clearing_staticdir(self):
+        stdout = six.StringIO()
+        self.run_collectstatic()
+        with mock.patch('django.contrib.staticfiles.management.commands.collectstatic.input',
+                        side_effect=self.mock_input(stdout)):
+            call_command('collectstatic', interactive=True, clear=True, stdout=stdout)
+
+        output = force_text(stdout.getvalue())
+        self.assertNotIn(self.overwrite_warning_msg, output)
+        self.assertIn(self.delete_warning_msg, output)
+
+    def test_warning_when_overwriting_files_in_staticdir(self):
+        stdout = six.StringIO()
+        self.run_collectstatic()
+        with mock.patch('django.contrib.staticfiles.management.commands.collectstatic.input',
+                        side_effect=self.mock_input(stdout)):
+            call_command('collectstatic', interactive=True, stdout=stdout)
+        output = force_text(stdout.getvalue())
+        self.assertIn(self.overwrite_warning_msg, output)
+        self.assertNotIn(self.delete_warning_msg, output)
+
+
 class TestCollectionExcludeNoDefaultIgnore(TestDefaults, CollectionTestCase):
     """
     Test ``--exclude-dirs`` and ``--no-default-ignore`` options of the