How do I test async code in JavaScript?
An example of an AI chatbot conversation about testing asynchronous code in JavaScript.
How do I test async code in JavaScript?
You can use testing frameworks like Jest or Mocha. They provide utilities to handle async code.
Can you show me an example using Jest?
Sure! You can use async/await in your tests. Here's a simple example:
test('fetches data', async () => {
const data = await fetchData();
expect(data).toBeDefined();
});
What if I want to test a function that returns a promise?
You can return the promise directly in your test. Jest will wait for it to resolve:
test('returns a promise', () => {
return expect(someAsyncFunction()).resolves.toEqual(expectedValue);
});
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