CI pipeline test stage in JUnit - Test Execution Trace

Test Overview

This test runs in a CI pipeline stage to verify that the Calculator's add method works correctly. It checks if adding two numbers returns the expected sum.

Test Code - JUnit 5

JUnit

import static org.junit.jupiter.api.Assertions.assertEquals;
import org.junit.jupiter.api.Test;

public class CalculatorTest {

    @Test
    public void testAdd() {
        Calculator calc = new Calculator();
        int result = calc.add(2, 3);
        assertEquals(5, result, "2 + 3 should equal 5");
    }
}

class Calculator {
    public int add(int a, int b) {
        return a + b;
    }
}

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Test runner starts and loads CalculatorTest class	JUnit test environment initialized	-	PASS
2	Runs testAdd() method	Calculator instance created	-	PASS
3	Calls add(2, 3) method	Method returns integer result	-	PASS
4	Assert that result equals 5	Result is 5	assertEquals(5, result)	PASS
5	Test completes successfully	Test marked as passed in report	-	PASS

Failure Scenario

Failing Condition: add method returns incorrect sum

Execution Trace Quiz - 3 Questions

What does the testAdd() method verify?

A That adding 2 and 3 returns 5

B That the Calculator class exists

C That the test runner starts correctly

D That the add method throws an exception

Key Result

Always include clear assertions in your CI pipeline tests to catch errors early and provide meaningful feedback.