Markers for categorization in Selenium Python - Practice Problems & Coding Challenges

Challenge - 5 Problems

🧠 Conceptual

intermediate

Purpose of Markers in pytest

What is the main purpose of using markers in pytest for test categorization?

A To group tests so you can selectively run subsets based on categories

B To automatically fix failing tests during runtime

C To convert test functions into classes

D To generate HTML reports without additional plugins

💡 Hint

Think about how you can run only some tests and skip others easily.

Markers help label tests so you can run only tests with certain labels, making test runs faster and more focused.

❓ Predict Output

intermediate

Output of pytest marker usage

Given the following pytest code, what will be the output when running `pytest -m smoke`?

Selenium Python

import pytest

@pytest.mark.smoke
def test_login():
    assert True

@pytest.mark.regression
def test_logout():
    assert True

@pytest.mark.smoke
def test_search():
    assert True

A Runs all three tests, all pass

B Runs test_login and test_search only, both pass

C Runs test_logout only, passes

D No tests run, error about unknown marker

💡 Hint

The -m option runs tests with the given marker only.

Using `pytest -m smoke` runs only tests marked with @pytest.mark.smoke, so test_login and test_search run and pass.

❓ assertion

advanced

Correct assertion for marker presence

Which assertion correctly checks if a test function has the marker 'regression' in pytest?

Selenium Python

def test_example(request):
    # How to assert 'regression' marker is present on this test?
    pass

A assert hasattr(request.node, 'regression')

B assert 'regression' in request.node.keywords

C assert request.node.marker == 'regression'

D assert request.node.get_closest_marker('regression') is not None

💡 Hint

Use the pytest API to get markers safely.

The get_closest_marker method returns the marker object or None if not found, so checking for not None confirms presence.

🔧 Debug

advanced

Fix marker registration error

You get this error when running pytest: "PytestUnknownMarkWarning: Unknown pytest.mark.regression - is this a typo?". What is the cause?

A The marker 'regression' is not registered in pytest.ini or pyproject.toml

B The test function name does not start with 'test_'

C The marker is misspelled in the test code

D pytest version is too old to support markers

💡 Hint

Check your pytest configuration files for marker declarations.

Pytest requires custom markers to be registered in configuration files to avoid warnings.

❓ framework

expert

Combining markers and fixtures for selective setup

You want to run a setup fixture only for tests marked with 'db'. Which pytest feature allows this selective fixture application?

A Use pytest hooks to skip fixture for unmarked tests

B Use @pytest.fixture(only_for='db') decorator

C Use autouse=True on fixture and check marker inside fixture code

D Use @pytest.mark.usefixtures('db_setup') on tests and mark tests with 'db'

💡 Hint

Think about how to run fixture code conditionally without decorating every test.

Setting autouse=True runs fixture for all tests, but inside fixture you can check if marker is present and skip setup if not.