Integration Testing: Do Your Components Play Well Together?
Integration testing verifies that different software modules, like an API and a database, work correctly together. It's used to catch bugs in the interactions between components, such as data format mismatches. The footgun is writing slow, brittle tests.
Integration testing verifies that different software modules—like a web server, an API, and a database—can correctly communicate. While unit tests check components in isolation, integration tests focus on the 'plumbing' between them. It's essential for catching bugs in data exchange, API calls, or service interactions before they hit production. The common footgun is creating tests that are too broad and slow, making them difficult to run frequently and maintain, blurring the line with full end-to-end tests.
Read the original → Wikipedia: Integration testing
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