validation tests

class RegistrationAPIViewTestCase(TestCase):
    """ This class defines the test suite for the registration view. """

    def setUp(self):

        self.existing_user_data = {
            "username": "janejones",
            "email": "jjones@email.com",
            "password": "Enter-123"}

        self.existing_user = User.objects.create_user(
            **self.existing_user_data)
        self.client = APIClient()

    def test_api_can_create_a_user(self):
        user_data = {
            "username": "henryjones",
            "email":'mwngnchls@gmail.com',
            "password": "Enterwithus12349"}

        response = self.client.post(
            '/api/users/',
            {"user": user_data},
            format="json")
        print("Response ", response.data)
        self.assertEqual(response.status_code, status.HTTP_201_CREATED)

    def test_api_cannot_create_a_user_with_existing_email(self):

        user_data = {
            "username": "peter",
            "email": self.existing_user_data["email"],
            "password": "Enter123"}

        response = self.client.post(
            '/api/users/',
            {"user": user_data},
            format="json")

        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
        self.assertIn("user with this email already exists.",
                      response.data["errors"]["email"], )

    def test_api_cannot_create_a_user_with_existing_username(self):

        user_data = {
            "username": self.existing_user_data["username"],
            "email": "peter@email.com",
            "password": "Enter123"}

        response = self.client.post(
            '/api/users/',
            {"user": user_data},
            format="json")

        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
        self.assertIn("user with this username already exists.",
                      response.data["errors"]["username"])

    def test_api_cannot_create_a_user_with_password_lessthan_eight_characters(self):

        user_data = {
            "username": "peter",
            "email": "peter@email.com",
            "password": "Enter"}

        response = self.client.post(
            '/api/users/',
            {"user": user_data},
            format="json")

        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
        self.assertIn("Ensure this field has at least 8 characters.",
                      response.data["errors"]["password"])

    def test_api_cannot_create_user_without_alphanumeric_password(self):
        user_data = {
                "username": "peter",
                "email": "peter@email.com",
                "password": "Password"
        }
        response = self.client.post(
            '/api/users/',
            { "user": user_data},
            format="json")
        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
        self.assertIn("password must contain a numeric character", response.data["errors"]["password"])

    def test_api_cannot_create_user_with_invalid_email(self):
        user_data = {
                "username": "peter",
                "email": "peter@.com",
                "password": "Password1"
        }
        response = self.client.post(
            '/api/users/',
            { "user": user_data},
            format="json")
        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
        self.assertIn("Enter a valid email address.", response.data["errors"]["email"])


    def test_api_cannot_create_user_with_short_username(self):
        user_data = {
                "username": "pet",
                "email": "peter@email.com",
                "password": "Password8"
        }
        response = self.client.post(
            '/api/users/',
            { "user": user_data},
            format="json")
        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
        self.assertIn("username should be atleast 4 characters long and shouldnt contain special characters", response.data["errors"]["username"])


    def test_api_cannot_create_user_with_special_character_in_username(self):
        user_data = {
                "username": "peter.",
                "email": "peter@email.com",
                "password": "Password9"
        }
        response = self.client.post(
            '/api/users/',
            { "user": user_data},
            format="json")
        self.assertEqual(response.status_code, status.HTTP_400_BAD_REQUEST)
        self.assertIn("username should be atleast 4 characters long and shouldnt contain special characters", response.data["errors"]["username"])