Test if a promise throw an Error

Hi, few weeks ago I had to solve this problem,

If the API return 404 I want my code to Throw and error, in general fetch will not throw an error on API failure with exception of a time out so I had to force that behavior:

Here is my base code

const response = await fetch(url); if (!response.ok) { if(response.status !== 404){ throw new Error(`Error on details API ${response.status}`) } } 

Ok... here the solution I end up with:

 await expect( api.fetchEvent(body) ).rejects.toThrow('Error on details API 404'); 

It can be improved but I thought sharing the solution may help somebody else