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16 best JavaScript Mock libraries in 2022

by Open Weaver kits ✔

A mock object of a given class or interface is designed to simulate the behavior of the real object. Used to test the behavior of other objects that are dependent on this mock object. A mock object returns dummy data corresponding to some dummy input passed to it. Mock objects can be used as a replacement for real objects in unit testing, they often also record how they were used so that you can make assertions about this after the test has finished. In this kit, we will discuss the top 8 JavaScript Mock Open Source libraries that you can use in your testing project. nock - HTTP server mocking and expectations library for Node.js; sinon - Test spies, stubs and mocks for JavaScript; easy-mock - persistent service that generates mock data quickly.
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