Pipeline stages and test gates in Testing Fundamentals - Test Execution Trace

Test Overview

This test simulates a software delivery pipeline with multiple stages and test gates. It verifies that the pipeline stops if a test gate fails, ensuring only quality code moves forward.

Test Code - PyTest

Testing Fundamentals

class Pipeline:
    def __init__(self):
        self.stages = []

    def add_stage(self, name, test_gate):
        self.stages.append({'name': name, 'test_gate': test_gate})

    def run(self):
        for stage in self.stages:
            print(f"Running stage: {stage['name']}")
            if not stage['test_gate']():
                print(f"Test gate failed at stage: {stage['name']}")
                return False
        return True

# Define test gates

def unit_tests():
    # Simulate unit tests passing
    return True

def integration_tests():
    # Simulate integration tests passing
    return True

def e2e_tests():
    # Simulate end-to-end tests failing
    return False

# Setup pipeline
pipeline = Pipeline()
pipeline.add_stage('Build', unit_tests)
pipeline.add_stage('Integration', integration_tests)
pipeline.add_stage('E2E', e2e_tests)

# Run pipeline
result = pipeline.run()
assert result == False, "Pipeline should fail due to E2E test gate failure"

Execution Trace - 5 Steps

Step	Action	System State	Assertion	Result
1	Initialize pipeline and add stages with test gates	Pipeline has 3 stages: Build, Integration, E2E with respective test gates	-	PASS
2	Run pipeline: execute 'Build' stage test gate (unit_tests)	Unit tests simulated as passing	unit_tests() returns True	PASS
3	Run pipeline: execute 'Integration' stage test gate (integration_tests)	Integration tests simulated as passing	integration_tests() returns True	PASS
4	Run pipeline: execute 'E2E' stage test gate (e2e_tests)	E2E tests simulated as failing	e2e_tests() returns False	PASS
5	Pipeline stops due to failed E2E test gate	Pipeline run returns False indicating failure	assert result == False	PASS

Failure Scenario

Failing Condition: If a test gate returns False, pipeline should stop and return False

Execution Trace Quiz - 3 Questions

What happens when the E2E test gate fails in the pipeline?

A The pipeline retries the E2E tests automatically

B The pipeline stops and returns failure

C The pipeline ignores the failure and continues

D The pipeline skips the E2E stage and finishes

Key Result

Use test gates in pipeline stages to automatically stop the process when quality checks fail, preventing faulty code from progressing.