Clojure microservices for JavaScript developers part 3

This final post in a series for JavaScript developers delves into setting up Clojure microservices, focusing on unit and integration testing, as well as continuous integration (CI) using CircleCI. It highlights the convenient built-in unit testing library, clojure.test, in Clojure, which facilitates test creation by mirroring source directories in a Leiningen project structure. The post explains using the deftest macro for unit testing, mocking external dependencies with the bond/with-stub! library, and employing fixtures for setup and teardown processes similar to Jest in JavaScript. Integration tests involve a system-map for component lifecycle management, including Redis connections and HTTP servers. The article also covers using Kaocha as a test runner and setting up a CI pipeline with CircleCI, which automates tests on every commit to prevent breaking changes, utilizing Docker images for environment setup and caching to optimize build times.

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