Registering markers in pytest.ini - Test Execution Trace

Test Overview

This test checks that a custom marker slow is registered in pytest.ini and can be used to mark tests. It verifies that pytest recognizes the marker and runs the test accordingly.

Test Code - pytest

PyTest

import pytest

@pytest.mark.slow
def test_example():
    assert 1 + 1 == 2

# pytest.ini content:
# [pytest]
# markers =
#     slow: marks tests as slow to run

Execution Trace - 4 Steps

Step	Action	System State	Assertion	Result
1	Test runner starts pytest and reads pytest.ini configuration	pytest.ini file is loaded with 'slow' marker registered	-	PASS
2	pytest discovers test_example function marked with @pytest.mark.slow	Test function is found with 'slow' marker attached	-	PASS
3	pytest runs test_example	Test executes the assertion 1 + 1 == 2	Assert that 1 + 1 equals 2	PASS
4	pytest reports test result	Test passed without errors, marker recognized	Test marked as 'slow' is accepted and runs successfully	PASS

Failure Scenario

Failing Condition: The 'slow' marker is not registered in pytest.ini and pytest raises a warning or error

Execution Trace Quiz - 3 Questions

What does registering a marker in pytest.ini do?

A It tells pytest that the marker is valid and avoids warnings

B It automatically runs tests faster

C It disables tests with that marker

D It changes the test function name

Key Result

Always register custom markers in pytest.ini to avoid warnings and clearly document test categories.