CI/CD for Software Testing

How do you shard Playwright/Cypress in CI?

Use the framework's built-in shard option, distribute via a matrix of runners, and merge JUnit/HTML reports at the end.

Declarative vs scripted Jenkins pipelines?

Declarative is opinionated YAML-like syntax with clear stages; scripted is full Groovy — use declarative unless you need dynamic stage generation.

How do you cache browsers in GitHub Actions?

Use actions/cache with the framework's browsers path key, falling back gracefully when versions change.

How do you keep secrets safe in CI?

Store as encrypted secrets, scope to environments, never echo them, rotate periodically, and never commit .env files.

How do you handle flake at the pipeline level?

Retry on transient failures, quarantine known-flaky tests with metrics, fail loudly on critical-path tests, and never silently ignore failures.

What's a quality gate?

An automated rule that blocks promotion (merge or deploy) when tests, coverage, or other quality metrics fall below thresholds.

When do you containerise your test runs?

When you need consistent OS/browser versions, parallel isolation, or to match production-like environments in performance tests.

What's a fan-out / fan-in CI pattern?

Fan out tests across shards in parallel, then fan in to a single merge step that aggregates results and reports.

How do you report results across shards?

Each shard writes JUnit/HTML/Allure artifacts; a final job downloads and merges them into one dashboard.

How do you balance speed vs cost?

Run smoke on every PR, full regression nightly, parallelise where ROI is highest, and trim slow suites with metrics.