How do I compare async mocks in Jest?
An example of an AI chatbot conversation about comparing async mocks in Jest testing.
How do I compare async mocks in Jest?
In Jest, you can compare async mocks by using the toHaveBeenCalledWith matcher to check if the mock was called with specific arguments.
Can you show me an example of that?
Sure! Here's a simple example:
const myMock = jest.fn();
async function fetchData() {
const data = await myMock();
return data;
}
fetchData();
expect(myMock).toHaveBeenCalledWith();
What if I want to check the return value of the async mock?
You can use await with your mock function and then check the return value like this:
const result = await fetchData();
expect(result).toEqual(expectedValue);
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