AWS Certified DevOps Engineer – ProfessionalSDLC AutomationHard
A DevOps team is adopting a trunk-based development model with frequent, small commits to a single main branch. Their CI/CD pipeline includes a comprehensive suite of unit, integration, and E2E tests, which currently run sequentially and take over an hour to complete. This long feedback loop is hindering developer productivity. How can the team significantly reduce the time developers wait for test results?
- AImplement parallel test execution across multiple ephemeral environments.
- BSwitch to manual testing for End-to-End tests.
- CMigrate the tests to a more powerful single EC2 instance.
- DReduce the number of tests in the test suite.
Show answer & explanationAnswer & explanation
Correct answer: A. Implement parallel test execution across multiple ephemeral environments.
Parallel test execution allows different parts of the test suite to run concurrently on multiple, isolated environments. This dramatically reduces the total execution time, providing faster feedback to developers without compromising test coverage, which is crucial for trunk-based development.
Why the other options are wrong
- B. Switching to manual testing removes automation and slows down the feedback loop, directly contradicting the goal.
- C. A single, more powerful instance might offer some improvement but is limited by the single-thread nature and won't scale like parallel execution.
- D. Reducing tests compromises quality and coverage, which is not a desirable solution.
Parallel Test Execution
The practice of running multiple test cases or test suites simultaneously across different environments or threads to reduce the overall time required for testing.
- Significantly reduces total test execution time.
- Crucial for fast feedback in CI/CD pipelines.
- Requires independent test cases to avoid conflicts.
- Can be implemented using distributed testing frameworks or CI/CD services like CodeBuild's batch builds.
Memory trick: Parallel tests: Many hands make light work, fast feedback.