unittest.mock.patch in PyTest - Interactive Code Practice

Practice - 5 Tasks

1fill in blank

easy

Complete the code to patch the 'requests.get' method in the test.

PyTest

from unittest.mock import patch

@patch('[1]')
def test_fetch_data(mock_get):
    mock_get.return_value.status_code = 200
    assert mock_get.return_value.status_code == 200

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Arequests.get

Brequests.post

Cos.path.exists

Djson.load

Attempts:

3 left

💡 Hint

Common Mistakes

Patching the wrong method like 'requests.post'.

Forgetting to patch the method as a string.

The @patch decorator replaces requests.get with a mock object during the test.

2fill in blank

medium

Complete the code to patch 'open' function in the 'builtins' module for the test.

PyTest

from unittest.mock import patch

@patch('[1]')
def test_file_read(mock_open):
    mock_open.return_value.read.return_value = 'data'
    with open('file.txt') as f:
        content = f.read()
    assert content == 'data'

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

Aio.open

Bos.open

Cbuiltins.open

Dopen.file

Attempts:

3 left

💡 Hint

Common Mistakes

Patching 'os.open' instead of 'builtins.open'.

Using incorrect module names.

To mock the built-in open function, patch builtins.open.

3fill in blank

hard

Fix the error in patching the 'datetime.datetime.now' method correctly.

PyTest

from unittest.mock import patch
import datetime

@patch('[1]')
def test_time(mock_now):
    mock_now.return_value = datetime.datetime(2020, 1, 1)
    assert datetime.datetime.now() == datetime.datetime(2020, 1, 1)

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

Adatetime.datetime

Bdatetime.datetime.now

Cdatetime.now

Ddatetime.now.now

Attempts:

3 left

💡 Hint

Common Mistakes

Patching 'datetime.now' which does not exist.

Patching the class instead of the method.

You must patch the full path to the method: datetime.datetime.now.

4fill in blank

hard

Fill both blanks to patch 'module.Class.method' and set the mock return value.

PyTest

from unittest.mock import patch

@patch('[1]')
def test_method(mock_method):
    mock_method.return_value = [2]
    result = mock_method()
    assert result == 42

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Amodule.Class.method

B42

C100

Dmodule.method

Attempts:

3 left

💡 Hint

Common Mistakes

Patching the wrong method path.

Setting the wrong return value.

Patch the full method path and set the return value to 42 to match the assertion.

5fill in blank

hard

Fill all three blanks to patch 'package.module.func', set return value, and assert call count.

PyTest

from unittest.mock import patch

@patch('[1]')
def test_func(mock_func):
    mock_func.return_value = [2]
    mock_func()
    mock_func()
    assert mock_func.call_count == [3]

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

Apackage.module.func

BTrue

C2

DFalse

Attempts:

3 left

💡 Hint

Common Mistakes

Incorrect patch path.

Wrong return value type.

Wrong call count assertion.

Patch the correct function, set return value to True, and assert it was called twice.