Lesson 04 · 13 min
Integration tests with a database and an API
A real database in Docker or Testcontainers, a transaction per test, API requests with supertest.
13 minLesson 4 of 5Practice includedAsk AI on any point
An integration test checks several parts together: an SQL query and a real database, an HTTP route and the service behind it. This is where you catch bugs that unit tests miss: an SQL mistake, a forgotten migration, a violated unique index, a wrong response status.
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