Why plugins extend PyTest capabilities - Test Your Understanding

Practice - 5 Tasks

1fill in blank

easy

Complete the code to import the PyTest plugin system.

PyTest

import pytest

@pytest.hookimpl(tryfirst=True)
def pytest_addoption(parser):
    parser.addoption('--myopt', action='store', default='default', help='My option')

# Plugin registration uses [1]

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

Apytest_register

Bpytest_addoption

Cpytest_plugins

Dpytest_plugin

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'pytest_register' instead of 'pytest_plugins'.

Confusing function names with plugin registration.

The variable 'pytest_plugins' is used to register plugins in PyTest.

2fill in blank

medium

Complete the code to add a command line option using a PyTest plugin.

PyTest

def pytest_addoption(parser):
    parser.addoption('--env', action=[1], default='dev', help='Set environment')

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

A'store'

B'store_true'

C'append'

D'count'

Attempts:

3 left

💡 Hint

Common Mistakes

Using 'store_true' which expects no value.

Using 'append' which collects multiple values.

The 'store' action saves the option value as a string.

3fill in blank

hard

Fix the error in the fixture that uses a plugin option.

PyTest

@pytest.fixture
def env(request):
    return request.config.getoption([1])

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

A'--environment'

B'--env'

C'environment'

D'env'

Attempts:

3 left

💡 Hint

Common Mistakes

Including dashes in the option name causes errors.

Using a different option name than defined.

The getoption method expects the option name without dashes.

4fill in blank

hard

Fill both blanks to create a plugin hook that modifies test collection.

PyTest

def pytest_collection_modifyitems(config, items):
    if config.getoption([1]):
        items[:] = [item for item in items if item.get_closest_marker([2]) is None]

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

A'skip_slow'

B'slow'

Attempts:

3 left

💡 Hint

Common Mistakes

Swapping option and marker names.

Using incorrect strings for option or marker.

The option name is 'skip_slow' and the marker to check is 'slow'.

5fill in blank

hard

Fill all three blanks to define a plugin that adds a custom marker and uses it in a test.

PyTest

def pytest_configure(config):
    config.addinivalue_line('markers', '[1]: mark test as [2]')

@pytest.mark.[3]
def test_example():
    assert True

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

Aslow

Bslow tests

Dfast

Attempts:

3 left

💡 Hint

Common Mistakes

Mismatch between marker name and usage.

Wrong description text.

The marker name is 'slow', description is 'slow tests', and test uses '@pytest.mark.slow'.