Why markers categorize and control tests in PyTest - Quick Recap

Recall & Review

beginner

What is the main purpose of markers in pytest?

Markers help group and control tests so you can run specific sets easily, like running only slow tests or tests for a feature.

beginner

How do markers improve test execution?

Markers let you select or skip tests based on labels, saving time by running only relevant tests.

beginner

Give an example of a common pytest marker and its use.

The marker @pytest.mark.slow labels tests that take longer. You can run only fast tests by skipping slow ones.

intermediate

Why is categorizing tests with markers helpful in large projects?

It helps organize tests by feature, speed, or type, making it easier to manage and run tests efficiently.

beginner

What command runs tests with a specific marker in pytest?

Use pytest -m <marker_name> to run only tests with that marker, for example pytest -m slow runs tests marked as slow.

What does the pytest marker @pytest.mark.skip do?

A Skips the test during execution

B Runs the test twice

C Marks the test as failed

D Groups the test with others

The @pytest.mark.skip marker tells pytest to skip the test when running.

How can you run only tests marked as 'fast' in pytest?

A pytest -m fast

B pytest --fast

C pytest --only fast

D pytest -r fast

The command pytest -m fast runs only tests marked with @pytest.mark.fast.

Why use markers to categorize tests?

A To change test code behavior

B To make tests run faster automatically

C To organize tests and control which run

D To delete tests after running

Markers help organize tests and decide which ones to run or skip.

Which pytest marker would you use to skip a test conditionally?

A @pytest.mark.run

B @pytest.mark.slow

C @pytest.mark.only

D @pytest.mark.skipif

@pytest.mark.skipif skips a test if a condition is true.

What happens if you run pytest without any markers?

A Only tests with markers run

B All tests run regardless of markers

C No tests run

D Tests marked as skip run only

By default, pytest runs all tests regardless of markers unless filtered.

Explain why markers are useful for controlling test execution in pytest.

Think about how you might want to run only some tests in a big project.

Describe how you would use markers to run only slow tests in pytest.

Consider labeling tests and using a command to filter them.