Testing Node.js,Express.js API with Mocha and Chai – Typescript

Contents >What is Mocha >what is Chai >what is Chai HTTP >Installing dependencies and getting started >Writing tests in the test files What is Mocha Mocha is a Javascript testing framework working on both Node.js and in the browser. We can use mocha to test APIs written to run in Node.js, created using frameworks like Express. Mocha runs the test cases serially and provides very accurate reporting. Mocha makes testing asynchronous testing easy and efficient. The latest version of Mocha available to use is 6.1.4. To install Mocha to be used with Node.js, use

Mocha is used in the development and testing phases and ideally not used in a production environment. So you use –save-dev while installing Mocha. What is Chai Chai is an assertion library used with testing frameworks like Mocha. An assertion in testing is an expression that will be true at a specific state of the application if there is no bug in the program. While testing Node.JS APIs, we can use this assertion library to check whether the response received from an API endpoint for a specific request is the expected one or not. To the latest version of Chai available to use is 4.2.0. To install…

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