Fixed #16681 -- Refactored the invalid_models unit test so that it can be invoked manually. Thanks to Anthony Briggs for the report and patch.

git-svn-id: http://code.djangoproject.com/svn/django/trunk@16661 bcc190cf-cafb-0310-a4f2-bffc1f526a37

tests/modeltests/invalid_models/tests.py

@@ -0,0 +1,37 @@
+import sys
+
+from django.utils import unittest
+
+
+class InvalidModelTestCase(unittest.TestCase):
+    """Import an appliation with invalid models and test the exceptions."""
+
+    def test_invalid_models(self):
+        from django.core.management.validation import get_validation_errors
+        from django.db.models.loading import load_app
+        from cStringIO import StringIO
+
+        try:
+            module = load_app("modeltests.invalid_models.invalid_models")
+        except Exception, e:
+            self.fail('Unable to load invalid model module')
+
+        # Make sure sys.stdout is not a tty so that we get errors without
+        # coloring attached (makes matching the results easier). We restore
+        # sys.stderr afterwards.
+        orig_stdout = sys.stdout
+        s = StringIO()
+        sys.stdout = s
+        count = get_validation_errors(s, module)
+        sys.stdout = orig_stdout
+        s.seek(0)
+        error_log = s.read()
+        actual = error_log.split('\n')
+        expected = module.model_errors.split('\n')
+
+        unexpected = [err for err in actual if err not in expected]
+        missing = [err for err in expected if err not in actual]
+        self.assertFalse(unexpected, "Unexpected Errors: " + '\n'.join(unexpected))
+        self.assertFalse(missing, "Missing Errors: " + '\n'.join(missing))
+
+