From the course: Testing React Applications with Jest and React Testing Library

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Testing user interactions and error handling

Testing user interactions and error handling

From the course: Testing React Applications with Jest and React Testing Library

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Testing user interactions and error handling

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- When users interact with our blog application, they expect immediate feedback. They want to see their comments appear instantly, like count updates, and error messages display when something goes wrong. Let's start with a simple interaction like liking a post. This test verifies that when a user clicks the like button, our toggle like function is called with the correct post id. The await before user.event or click is important. Unlike fire events which execute synchronously, user event method return promises to accurately represent the timing of real interactions. This ensures our test waits for the click to complete before continuing. Now let's see how to test user interaction that triggers API calls. We are simulating a user adding a comment and we are verifying two things. The new comments appears in the UI and the comment count updates accordingly. This test not only verifies that the API call was made, but also that our component correctly updates the UI based on the API…

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