What This Stack Does
This stack prevents the most expensive category of microservice bugs: integration failures that pass unit tests but break in production. Pact provides consumer-driven contract testing — the consumer defines expectations, the provider verifies compliance, and the broker coordinates compatibility across all service versions. Karate DSL unifies API testing, performance testing, and contract testing in a single BDD-style framework.
From Exploration to End-to-End Validation
Hurl handles HTTP test automation in CI/CD pipelines with plain text test files that diff cleanly in Git. Bruno provides interactive API exploration during development with Git-friendly collection storage. Playwright covers end-to-end testing when service integration needs to be validated through the UI layer. Together, these tools cover the complete testing pyramid for microservice architectures.
Putting the Workflow Together
The recommended workflow: developers explore APIs with Bruno during development, write contract expectations in Pact, automate HTTP tests in Hurl for CI/CD, use Karate for unified API and performance testing, and validate critical paths end-to-end with Playwright.
The Bottom Line
Budget: $0/month. All tools in this stack are open-source. PactFlow (managed Pact broker) is available for teams wanting managed contract coordination starting at $99/month.