How does one get the most recent call for a mock function in jest?

Question

If I have a mock function say myMockFunction I know I can check its calls like so:

const firstCall = myMockFunction.mock.calls[0];

Is there an easy/clean way to get the most recent call?

I think that the following would work:

const mostRecentCall = myMockFunction.mock.calls[myMockFunction.mock.calls.length -1];

This seems rather hacky/tiresome, is there a cleaner/easier way?

Answer 1

If calls is an array and you don't care to preserve its contents, you could do myMockFunction.mock.calls.pop() to get the last call.

Answer 2

You should be able to access the last element by slicing backwards:

myMockFunction.mock.calls.slice(-1)[0]

Of course, if you don't have any calls yet, you'll get an undefined. Depending on your tests, that may or may not be an issue.