Vincent Hennig & Anupam Krishnamurthy
Contract Testing - How do you tame an external API that constantly breaks your tests
#1about 4 minutes
How a fragile external API broke our tests
A major backend API update broke all frontend tests, leading to 172 hours of developer time spent on fixes.
#2about 5 minutes
Validating API contracts at three distinct levels
Implement robust API tests by validating status codes, response schemas, and specific required data for frontend features.
#3about 4 minutes
Enforcing contracts by treating code as the contract
Replace static documentation with executable contract tests and share them with your partner team to improve debugging and collaboration.
#4about 9 minutes
Simulating contracts to decouple from external APIs
Use a mock server to increase development stability, improve test reliability, and allow frontend work to proceed even when the real API is down.
#5about 1 minute
A summary of the three-step contract testing process
A recap of the validate, enforce, and simulate strategy for managing dependencies on external APIs.
#6about 3 minutes
Q&A on mocking tools and handling API versioning
The speakers answer audience questions about using WireMock versus Karate for mocking, handling API versioning, and managing credentials.
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Introducing contract testing for safe API evolution
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00:57 MIN
Using contract testing to build a version-free API
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07:38 MIN
Implementing consumer-driven contract tests with Pact
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03:34 MIN
Using data contracts to stabilize data integration
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04:09 MIN
Achieving high test coverage with API-level tests
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