Command-line options in PyTest - Test Execution Trace

Test Overview

This test runs a simple pytest test function using the command-line option -v for verbose output. It verifies that the test passes and the verbose output is shown.

Test Code - pytest

PyTest

import pytest

def test_addition():
    assert 2 + 3 == 5

# To run this test with verbose output, use:
# pytest -v test_file.py

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test runner starts pytest with command-line option '-v' for verbose output	Terminal shows pytest starting with verbose mode enabled	-	PASS
2	Pytest discovers the test function 'test_addition'	Test function is found and ready to run	-	PASS
3	Pytest runs 'test_addition' function	Test executes the assertion 2 + 3 == 5	Assert that 2 + 3 equals 5	PASS
4	Pytest outputs verbose test result line	Terminal shows 'test_addition PASSED' with test name	Check that verbose output includes test name and PASSED status	PASS
5	Pytest finishes test run and shows summary	Terminal shows summary with 1 passed test	Verify summary reports 1 passed test	PASS

Failure Scenario

Failing Condition: The assertion in test_addition fails (e.g., 2 + 3 != 5)

Execution Trace Quiz - 3 Questions

What does the '-v' option do when running pytest?

A Runs tests in silent mode

B Skips all tests

C Shows detailed test names and results

D Runs tests twice

Key Result

Using command-line options like '-v' helps testers see detailed test results, making it easier to understand which tests ran and their outcomes.