Writing a behaviour driven API testing environment within Postman
Blog post from Postman
The author discusses the creation of a lightweight behavior-driven testing framework named "describe-it" for use within Postman, inspired by popular frameworks like Mocha and Jasmine. This tiny, 0.7kb minified script allows users to write organized tests with isolated assertions, enhancing the testing of API responses by mimicking the specification style of behavior-driven development (BDD). The framework includes functions such as `describe`, `it`, `beforeEach`, `afterEach`, and `expect`, which perform various testing and assertion tasks similar to those in Mocha and Jasmine. Users can save the script as a global variable within Postman, enabling reuse across multiple requests without manual addition, and integrate it into test scripts by evaluating the global variable. The author provides an example of using the framework to check for a 200 status code and HTML content type in API responses, demonstrating its functionality through nested describe blocks and sequential test execution, even in the presence of runtime errors.
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