mockRejectedValueOnce() fails to replace default return value

🐛 Bug Report

mockRejectedValueOnce() fails to replace default return value in v23.3.0

To Reproduce

const mock = jest.fn().mockReturnValue(Promise.resolve(10));
it('test', () => {
    mock.mockRejectedValueOnce(20);
    return expect(mock()).rejects.toBe(20);
});

Expected behavior

Test passes

Actual behavior

  ● test

    expect(received).rejects.toBe()

    Expected received Promise to reject, instead it resolved to value
      10

      2 | it('test', () => {
      3 |     mock.mockRejectedValueOnce(20);
    > 4 |     return expect(mock()).rejects.toBe(20);
        |            ^
      5 | });
      6 |

Workaround

Set default return value with mockImplementation() or mockResolvedValue()

const mock = jest.fn().mockImplementation(() => Promise.resolve(10));
or
const mock = jest.fn().mockResolvedValue(10);

[theutz]

I’m having precisely the same issue in an async setting, too. It seems none of the mock...Once functions are working as expected.

---

UPDATE: It turns out, I was not marking my beforeAll() method async, which was the cause of the instability. I’m in v23.5.0, though, so perhaps this is still broken in v23.3.0

[github-actions[bot]]

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