Web Reference: It's common in JavaScript for code to run asynchronously. When you have code that runs asynchronously, Jest needs to know when the code it is testing has completed, before it can move on to another test. Jest has several ways to handle this. Mar 16, 2023 · In this example, we define a test with the name "the right way to test a callback". The test function takes a done parameter, which is used to indicate that the test is asynchronous and Jest... Jan 22, 2010 · Now I want to test my asynchronous function - checking that the callback is triggered with the expected parameter. This code seems to work. However, I feel like it might blow up at any time - and my concern is race condition of the callback to finish before the function ends and the test is terminated - as this will be run in a separate thread.
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