1 files changed, 56 insertions, 0 deletions
diff --git a/tests/validators/tests.py b/tests/validators/tests.py
index 23fa1e3830..ec91486658 100644
--- a/tests/validators/tests.py
+++ b/tests/validators/tests.py
@@ -244,3 +244,59 @@ for validator, value, expected in TEST_DATA:
     name, method = create_simple_test_method(validator, expected, value, test_counter)
     setattr(TestSimpleValidators, name, method)
     test_counter += 1
+
+
+class TestValidatorEquality(TestCase):
+    """
+    Tests that validators have valid equality operators (#21638)
+    """
+
+    def test_regex_equality(self):
+        self.assertEqual(
+            RegexValidator(r'^(?:[a-z0-9\.\-]*)://'),
+            RegexValidator(r'^(?:[a-z0-9\.\-]*)://'),
+        )
+        self.assertNotEqual(
+            RegexValidator(r'^(?:[a-z0-9\.\-]*)://'),
+            RegexValidator(r'^(?:[0-9\.\-]*)://'),
+        )
+        self.assertEqual(
+            RegexValidator(r'^(?:[a-z0-9\.\-]*)://', "oh noes", "invalid"),
+            RegexValidator(r'^(?:[a-z0-9\.\-]*)://', "oh noes", "invalid"),
+        )
+        self.assertNotEqual(
+            RegexValidator(r'^(?:[a-z0-9\.\-]*)://', "oh", "invalid"),
+            RegexValidator(r'^(?:[a-z0-9\.\-]*)://', "oh noes", "invalid"),
+        )
+        self.assertNotEqual(
+            RegexValidator(r'^(?:[a-z0-9\.\-]*)://', "oh noes", "invalid"),
+            RegexValidator(r'^(?:[a-z0-9\.\-]*)://'),
+        )
+
+    def test_email_equality(self):
+        self.assertEqual(
+            EmailValidator(),
+            EmailValidator(),
+        )
+        self.assertNotEqual(
+            EmailValidator(message="BAD EMAIL"),
+            EmailValidator(),
+        )
+        self.assertEqual(
+            EmailValidator(message="BAD EMAIL", code="bad"),
+            EmailValidator(message="BAD EMAIL", code="bad"),
+        )
+
+    def test_basic_equality(self):
+        self.assertEqual(
+            MaxValueValidator(44),
+            MaxValueValidator(44),
+        )
+        self.assertNotEqual(
+            MaxValueValidator(44),
+            MinValueValidator(44),
+        )
+        self.assertNotEqual(
+            MinValueValidator(45),
+            MinValueValidator(11),
+        )