How to test successful promise and rejected when a promis fails (async await)

gistfile1.txt

  async function doSomething() {
    return 'some result'
  }

  async function doSomethingAndFail() {
    throw new Error()
  }

  describe('promise testing', () => {
    it('resolves fine', async () => {
      await expect(doSomething()).resolves.toBeDefined();
    });

    it('fails and thus rejects', async () => {
      await expect(doSomethingAndFail()).rejects.toThrow(Error);
    });
  });