The API Testing Mindset: Why I Test Contracts, Not Just Responses
Moving beyond simple status code checks to build robust API testing strategies that catch real bugs and prevent integration nightmares.
TL
Too Long; Didn't Read
5 key points
- 1Status code 200 doesn't guarantee your API won't break production - test the response structure and data contracts
- 2Use JSON Schema validation to catch when API responses change structure, data types, or required fields
- 3Test complete user journeys across multiple endpoints, not just isolated API calls
- 4Edge cases and error scenarios reveal more bugs than happy path testing
- 5Contract testing with tools like Pact prevents integration failures between microservices
Chris
October 12, 2025
5 min read
#api
#rest
#contract-testing
#microservices
#postman