Error in pytest with django response codes-CodePudding

I am using pytest to test my django rest framework API and am gettin gan error on the following test:

def test_client_gets_invalid_when_submitting_invlaid_data(self):
    client = APIClient()
    response = client.post(path="/user/register/", data={})
    assert response.status_code is 400

traceback in pytest is as follows:

>       assert response.status_code is 400
E       assert 400 is 400
E           where 400 = <Response status_code=400, "application/json">.status_code

core\tests\test_views.py:26: AssertionError

I dont understand how this error can be happening when 400 is literally equal to 400?

CodePudding user response：

So it turns out that the keyword is tests for identity in memory, where as == tests for value.

So the solution was to simply change from is to ==

https://www.geeksforgeeks.org/python-object-comparison-is-vs/

CodePudding user response：

The is operator compares the identity of the two objects, not their value. In this case, response.status_code is an int object, and 400 is also an int object, but they are different instances of int objects.

You should use the == operator instead to compare their values.

def test_client_gets_invalid_when_submitting_invlaid_data(self):
    client = APIClient()
    response = client.post(path="/user/register/", data={})
    assert response.status_code == 400