How I can test in jest line with throw e?

Question

How I can test in jest error case? This is what I do: I don\'t know if exist a method how to test this.

it (\'the fetch fails and throw an error\', async () =         


        

Answer 1

You can do it in the following way:

async function throws () {
  throw new Error('error')
}

test('promise throws', async () => {
  await expect(throws()).rejects.toThrow()
})

test('the fetch fails with an error', async () => {
  await expect(throws()).rejects.toThrow('error');
});

test('the fetch fails with an error', () => {
  return expect(throws()).rejects.toMatch('error');
});

Read more docs.