add user model tests

app/core/tests/test_models.py

@@ -0,0 +1,16 @@
+from django.test import TestCase
+from django.contrib.auth import get_user_model
+
+
+class ModelTests(TestCase):
+
+    def test_create_user_with_email_successful(self):
+        email = '[email protected]'
+        password = 'pp4b'
+        user = get_user_model().objects.create_user(
+            email=email,
+            password=password,
+        )
+
+        self.assertEqual(user.email, email)
+        self.assertTrue(user.check_password(password))