Perform password validation in UpdateUser

Closes #1768 (closed)

arkindex/users/tests/test_registration.py

@@ -64,6 +64,22 @@ class TestRegistration(FixtureAPITestCase):
         )
         self.assertEqual(response.status_code, status.HTTP_200_OK)
 
+    def test_update_password_validation(self):
+        self.client.force_login(self.user)
+        response = self.client.patch(
+            reverse("api:user-retrieve"),
+            data={"password": "email"},
+            format="json",
+        )
+        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
+        self.assertDictEqual(response.json(), {
+            "password": [
+                "The password is too similar to the email address.",
+                "This password is too short. It must contain at least 8 characters.",
+                "This password is too common.",
+            ]
+        })
+
     def test_update_display_name(self):
         self.client.force_login(self.user)
         response = self.client.patch(