.toThrow() does not work

Normally you expect some functions to throw errors, you write this:

async function foo(){
   throw new Error('some error');
}
test('catch throws', async ()=>{
   const result = await foo();
   expect(result).toThrow();
});

Well, it does not work.

But this works:

async function foo(){
   throw new Error('some error');
}
test('catch throw', async ()=>{
   const result = ()=> await foo();
   expect(result).rejects.toThrow();
});

• Expectation needs a function argument.
• Prefix method is followed after toThrow() .

Read more at https://jestjs.io/docs/en/asynchronous#resolves-rejects