apitesting/tests/test_todos.py

from unittest.mock import Mock, patch
import pytest

from apitesting.services import get_todos, get_uncompleted_todos


def test_request_response():
    with patch('apitesting.services.requests.get') as mock_get:
        mock_get.return_value.ok = True
        response = get_todos()

    assert response is not None


def test_getting_todos_when_response_is_ok():
    todos = [{
        'userId': 1,
        'id': 1,
        'title': 'Make the bed',
        'completed': False
    }]

    with patch('apitesting.services.requests.get') as mock_get:
        mock_get.return_value.ok = True
        mock_get.return_value.json.return_value = todos

        response = get_todos()

    assert response is not None
    assert response.json() == todos


def testing_getting_todos_when_response_is_not_ok():
    with patch('apitesting.services.requests.get') as mock_get:
        mock_get.return_value.ok = False

        response = get_todos()

    assert response is None


def test_getting_uncompleted_todos_when_todos_is_not_none():
    todo1 = {
        'userId': 1,
        'id': 1,
        'title': 'Make the bed',
        'completed': False
    }
    todo2 = {
        'userId': 1,
        'id': 2,
        'title': 'Walk the dog',
        'completed': True
    }
    with patch('apitesting.services.get_todos') as mock_get_todos:
        mock_get_todos.return_value = Mock()
        mock_get_todos.return_value.json.return_value = [todo1, todo2]

        uncompleted_todos = get_uncompleted_todos()

        assert mock_get_todos.called


def testing_getting_uncompleted_todos_when_todos_is_none():
    with patch('apitesting.services.get_todos') as mock_get_todos:
        mock_get_todos.return_value = None
        uncompleted_todos = get_uncompleted_todos()
        assert mock_get_todos.called
        assert uncompleted_todos == []


def test_integration_contract():
    """Test used to maintain the actual vs mocked API response contract"""
    actual = get_todos()
    actual_keys = actual.json().pop().keys()

    with patch('apitesting.services.requests.get') as mock_get:
        mock_get.return_value.ok = True
        mock_get.return_value.json.return_value = [{
            'userId': 1,
            'id': 1,
            'title': 'Make the bed',
            'completed': False
        }]

        mocked = get_todos()
        mocked_keys = mocked.json().pop().keys()

    assert set(actual_keys) == set(mocked_keys)