Grouping related tests in PyTest - Test Execution Trace

Test Overview

This test group checks basic math operations: addition and subtraction. It verifies that the functions return correct results.

Test Code - PyTest

PyTest

import pytest

class TestMathOperations:
    def test_addition(self):
        assert 2 + 3 == 5

    def test_subtraction(self):
        assert 5 - 3 == 2

Execution Trace - 4 Steps

Step	Action	System State	Assertion	Result
1	PyTest starts and discovers tests in TestMathOperations class	Test runner ready to execute test_addition and test_subtraction	-	PASS
2	Runs test_addition method	Executing assertion 2 + 3 == 5	Check if 2 + 3 equals 5	PASS
3	Runs test_subtraction method	Executing assertion 5 - 3 == 2	Check if 5 - 3 equals 2	PASS
4	PyTest finishes running all tests in TestMathOperations	All tests passed	-	PASS

Failure Scenario

Failing Condition: If the subtraction assertion is incorrect, e.g., 5 - 3 != 2

Execution Trace Quiz - 3 Questions

What does the test_addition method verify?

A That 2 times 3 equals 6

B That 5 minus 3 equals 2

C That 2 plus 3 equals 5

D That 3 plus 3 equals 6

Key Result

Grouping related tests inside a class helps organize tests logically and makes it easier to run and maintain them together.