Jest test vs it

When working on Jest test cases, you might come across two different approaches, as you can see below.

test('if this function succeeds', () => {
  expect(1).toBeTruthy();
});

it('should test if this function succeeds', () => {
  expect(1).toBeTruthy();
});

As you can see, the above tests are pretty much the same function. However, the naming is different.

The difference between test and it in Jest permalink

Basically, it is an alias for test, so they are functionally the same.

So, what makes it different?

This alias is created to make your tests more readable from a test output point of view.

It can really help make your tests more readable from a readability point of view.

Imagine the second test to use the test function.

test('should test if this function succeeds', () => {
  expect(1).toBeTruthy();
});

This immediately sounds a bit off, right?

And these outputs definitely show up weird in your test result, so try to make them look as much like English sentences as possible.

Which one wins? permalink

This totally depends on the use case.

I personally use it more for render checks. It often makes more sense.

• “it should have a button.”
• “it should navigate to x.”

However, it’s totally up to you which one makes more sense for specific use-cases.

Which one do you prefer?

Thank you for reading, and let’s connect! permalink

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