Rewrote test_error_messages with helper test utility.

tests/modeltests/validation/test_error_messages.py

@@ -5,142 +5,89 @@ from django.utils.unittest import TestCase
 
 class ValidationMessagesTest(TestCase):
 
+    def _test_validation_messages(self, field, value, expected):
+        with self.assertRaises(ValidationError) as cm:
+            field.clean(value, None)
+        self.assertEqual(cm.exception.messages, expected)
+
     def test_autofield_field_raises_error_message(self):
         f = models.AutoField(primary_key=True)
-        self.assertRaises(ValidationError, f.clean, 'foo', None)
-        try:
-            f.clean('foo', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [u"'foo' value must be an integer."])
+        self._test_validation_messages(f, 'foo',
+            [u"'foo' value must be an integer."])
         # primary_key must be True. Refs #12467.
-        self.assertRaises(AssertionError, models.AutoField, 'primary_key', False)
-        try:
+        with self.assertRaisesRegexp(AssertionError,
+                "AutoFields must have primary_key=True."):
             models.AutoField(primary_key=False)
-        except AssertionError as e:
-            self.assertEqual(str(e), "AutoFields must have primary_key=True.")
 
     def test_integer_field_raises_error_message(self):
         f = models.IntegerField()
-        self.assertRaises(ValidationError, f.clean, 'foo', None)
-        try:
-            f.clean('foo', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [u"'foo' value must be an integer."])
+        self._test_validation_messages(f, 'foo',
+            [u"'foo' value must be an integer."])
 
     def test_boolean_field_raises_error_message(self):
         f = models.BooleanField()
-        self.assertRaises(ValidationError, f.clean, 'foo', None)
-        try:
-            f.clean('foo', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages,
+        self._test_validation_messages(f, 'foo',
             [u"'foo' value must be either True or False."])
 
     def test_float_field_raises_error_message(self):
         f = models.FloatField()
-        self.assertRaises(ValidationError, f.clean, 'foo', None)
-        try:
-            f.clean('foo', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [u"'foo' value must be a float."])
+        self._test_validation_messages(f, 'foo',
+            [u"'foo' value must be a float."])
 
     def test_decimal_field_raises_error_message(self):
         f = models.DecimalField()
-        self.assertRaises(ValidationError, f.clean, 'foo', None)
-        try:
-            f.clean('foo', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages,
+        self._test_validation_messages(f, 'foo',
             [u"'foo' value must be a decimal number."])
 
     def test_null_boolean_field_raises_error_message(self):
         f = models.NullBooleanField()
-        self.assertRaises(ValidationError, f.clean, 'foo', None)
-        try:
-            f.clean('foo', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages,
+        self._test_validation_messages(f, 'foo',
             [u"'foo' value must be either None, True or False."])
 
     def test_date_field_raises_error_message(self):
         f = models.DateField()
-        self.assertRaises(ValidationError, f.clean, 'foo', None)
-        try:
-            f.clean('foo', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [
-                u"'foo' value has an invalid date format. "
+        self._test_validation_messages(f, 'foo',
+            [u"'foo' value has an invalid date format. "
              u"It must be in YYYY-MM-DD format."])
 
-        self.assertRaises(ValidationError, f.clean, 'aaaa-10-10', None)
-        try:
-            f.clean('aaaa-10-10', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [
-                u"'aaaa-10-10' value has an invalid date format. "
+        self._test_validation_messages(f, 'aaaa-10-10',
+            [u"'aaaa-10-10' value has an invalid date format. "
              u"It must be in YYYY-MM-DD format."])
 
-        self.assertRaises(ValidationError, f.clean, '2011-13-10', None)
-        try:
-            f.clean('2011-13-10', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [
-                u"'2011-13-10' value has the correct format (YYYY-MM-DD) "
+        self._test_validation_messages(f, '2011-13-10',
+            [u"'2011-13-10' value has the correct format (YYYY-MM-DD) "
              u"but it is an invalid date."])
 
-        self.assertRaises(ValidationError, f.clean, '2011-10-32', None)
-        try:
-            f.clean('2011-10-32', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [
-                u"'2011-10-32' value has the correct format (YYYY-MM-DD) "
+        self._test_validation_messages(f, '2011-10-32',
+            [u"'2011-10-32' value has the correct format (YYYY-MM-DD) "
              u"but it is an invalid date."])
 
     def test_datetime_field_raises_error_message(self):
         f = models.DateTimeField()
         # Wrong format
-        self.assertRaises(ValidationError, f.clean, 'foo', None)
-        try:
-            f.clean('foo', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [
-                u"'foo' value has an invalid format. It must be "
+        self._test_validation_messages(f, 'foo',
+            [u"'foo' value has an invalid format. It must be "
              u"in YYYY-MM-DD HH:MM[:ss[.uuuuuu]][TZ] format."])
 
         # Correct format but invalid date
-        self.assertRaises(ValidationError, f.clean, '2011-10-32', None)
-        try:
-            f.clean('2011-10-32', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [
-                u"'2011-10-32' value has the correct format "
+        self._test_validation_messages(f, '2011-10-32',
+            [u"'2011-10-32' value has the correct format "
              u"(YYYY-MM-DD) but it is an invalid date."])
 
         # Correct format but invalid date/time
-        self.assertRaises(ValidationError, f.clean, '2011-10-32 10:10', None)
-        try:
-            f.clean('2011-10-32 10:10', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [
-                u"'2011-10-32 10:10' value has the correct format "
+        self._test_validation_messages(f, '2011-10-32 10:10',
+            [u"'2011-10-32 10:10' value has the correct format "
              u"(YYYY-MM-DD HH:MM[:ss[.uuuuuu]][TZ]) "
              u"but it is an invalid date/time."])
 
     def test_time_field_raises_error_message(self):
         f = models.TimeField()
         # Wrong format
-        self.assertRaises(ValidationError, f.clean, 'foo', None)
-        try:
-            f.clean('foo', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [
-                u"'foo' value has an invalid format. It must be in "
+        self._test_validation_messages(f, 'foo',
+            [u"'foo' value has an invalid format. It must be in "
              u"HH:MM[:ss[.uuuuuu]] format."])
+
         # Correct format but invalid time
-        self.assertRaises(ValidationError, f.clean, '25:50', None)
-        try:
-            f.clean('25:50', None)
-        except ValidationError as e:
-            self.assertEqual(e.messages, [
-                u"'25:50' value has the correct format "
+        self._test_validation_messages(f, '25:50',
+            [u"'25:50' value has the correct format "
              u"(HH:MM[:ss[.uuuuuu]]) but it is an invalid time."])