Condition coverage in Testing Fundamentals - Test Execution Trace

Test Overview

This test checks a simple function with two conditions combined by AND. It verifies that each condition is tested both true and false at least once, ensuring condition coverage.

Test Code - unittest

Testing Fundamentals

def check_conditions(a, b):
    if a > 0 and b > 0:
        return True
    else:
        return False

import unittest

class TestConditionCoverage(unittest.TestCase):
    def test_condition_coverage(self):
        # Test case 1: a > 0 true, b > 0 true
        self.assertTrue(check_conditions(1, 1))
        # Test case 2: a > 0 false, b > 0 true
        self.assertFalse(check_conditions(0, 1))
        # Test case 3: a > 0 true, b > 0 false
        self.assertFalse(check_conditions(1, 0))

if __name__ == '__main__':
    unittest.main()

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test starts	Test runner initialized	-	PASS
2	Calls check_conditions(1, 1)	Function evaluates a > 0 (true) and b > 0 (true)	AssertTrue passes because both conditions true	PASS
3	Calls check_conditions(0, 1)	Function evaluates a > 0 (false) and b > 0 (true)	AssertFalse passes because first condition false	PASS
4	Calls check_conditions(1, 0)	Function evaluates a > 0 (true) and b > 0 (false)	AssertFalse passes because second condition false	PASS
5	Test ends	All assertions passed	All conditions covered true and false	PASS

Failure Scenario

Failing Condition: Missing test case where a > 0 is false but b > 0 is true

Execution Trace Quiz - 3 Questions

What does condition coverage ensure in this test?

A All possible combinations of conditions are tested

B Each condition is tested both true and false at least once

C Only the final output is checked

D Conditions are tested only when both are true

Key Result

Condition coverage requires testing each condition in a decision as true and false at least once, even if not all combinations are tested.