test.py

import pytest


@pytest.fixture(params=[
    {
        'response': {'a':'b'},
        'code': 201,
        'result': True,
    },
    {
        'response': {'error': 'masdfasd'}
        'code': 403,
        'result': False,
    }])
def user(request, mocker):
    m = mocker.patch('app.http.request')
    def user_api_mock(method, url, data, headers):
        assert method == 'DELETE'
        assert url == '/v1/user/{}'.format(TEST_USER_ID)
        assert not data
        return request.param['code'], request.param['response']
    m.side_effect = user_api_mock
    return m
    
def test_user(user):
    response = function_that_uses_the_mocked_function()
    if user:
       assert response.status_code == 201
    else:
       assert response.status_code == 403