pytest-mock for enhanced mocking - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to mock the requests.get method using pytest-mock.

PyTest

def test_api_call(mocker):
    mock_get = mocker.patch('[1]')
    mock_get.return_value.status_code = 200
    response = requests.get('http://example.com')
    assert response.status_code == 200

Drag options to blanks, or click blank then click option'

Arequests.post

Brequests.get

Crequests.put

Drequests.delete

Attempts:

3 left

💡 Hint

Common Mistakes

Mocking the wrong HTTP method like post or put.

Not specifying the full path to the method to mock.

We use mocker.patch('requests.get') to mock the get method from the requests library.

2fill in blank

medium

Complete the code to assert that the mocked method was called exactly once.

PyTest

def test_api_call(mocker):
    mock_get = mocker.patch('requests.get')
    requests.get('http://example.com')
    mock_get.[1]()

Drag options to blanks, or click blank then click option'

Aassert_called_once

Bassert_called_once_with

Cassert_called

Dassert_not_called

Attempts:

3 left

💡 Hint

Common Mistakes

Using assert_called_once_with without arguments.

Using assert_called which only checks if called at least once.

The method assert_called_once() checks that the mock was called exactly one time.

3fill in blank

hard

Fix the error in the code to correctly mock a function get_data from my_module.

PyTest

def test_get_data(mocker):
    mock_func = mocker.patch('[1]')
    mock_func.return_value = {'key': 'value'}
    result = my_module.get_data()
    assert result == {'key': 'value'}

Drag options to blanks, or click blank then click option'

Amy_module.getdata

Bget_data

Cmy_module.get_data

Dmy_module.get_data()

Attempts:

3 left

💡 Hint

Common Mistakes

Patching only the function name without module.

Including parentheses in the patch string.

The correct way is to patch the full path to the function as a string without calling it.

4fill in blank

hard

Fill both blanks to create a mock that returns True when called and assert it was called with argument 42.

PyTest

def test_mock_behavior(mocker):
    mock_func = mocker.patch('module.func')
    mock_func.return_value = [1]
    result = mock_func(42)
    assert result is True
    mock_func.[2](42)

Drag options to blanks, or click blank then click option'

ATrue

Bassert_called_once_with

Cassert_called_with

DFalse

Attempts:

3 left

💡 Hint

Common Mistakes

Using assert_called_once_with when multiple calls might happen.

Setting return_value to False by mistake.

Set return_value to True and use assert_called_with(42) to check the call argument.

5fill in blank

hard

Fill all three blanks to mock a method calculate in calc_module, set its return value to 10, call it with argument 5, and assert the call.

PyTest

def test_calculate(mocker):
    mock_calc = mocker.patch('[1]')
    mock_calc.return_value = [2]
    result = mock_calc([3])
    assert result == 10
    mock_calc.assert_called_once_with(5)

Drag options to blanks, or click blank then click option'

Acalc_module.calculate

B10

C5

Dcalc_module.calc

Attempts:

3 left

💡 Hint

Common Mistakes

Using wrong module or method name in patch.

Setting return value or call argument incorrectly.

Patch the full method path, set return value to 10, and call with 5.