[Bug]: expect.not.objectContaining and expect.not.arrayContaining not working correctly

[rmclaughlin-nelnet]

Version

30.2.0

Steps to reproduce

Run this test

describe('test', () => {
  it('should work', async () => {
    expect.assertions(1);

    expect([
      { bank_id: 'b823bbb8-4e46-44c6-bad2-4a70c3404e47', status: 'READY_TO_FUND' },
      { bank_id: '9f03955e-c9b1-40be-8fe2-07029ecdec52', status: 'PENDING_OFFER' },
      { bank_id: 'f43a068d-a5fc-42bc-8fb3-0e3f31b314dc', status: 'NEW' },
      { bank_id: '8b86143a-e319-4655-855b-ac2090219a9b', status: 'FUNDING_EXPIRED' },
      { bank_id: 'b2e77e4d-d027-4aa8-ae31-f975deb34ea4', status: 'FUNDING_EXPIRED' },
      { bank_id: 'fce48337-7341-4579-b187-39aca0353dfe', status: 'PENDING_DELETE' }
    ]).toEqual(
      expect.arrayContaining([
        { bank_id: '8b86143a-e319-4655-855b-ac2090219a9b', status: 'FUNDING_EXPIRED' },
        { bank_id: 'b2e77e4d-d027-4aa8-ae31-f975deb34ea4', status: 'FUNDING_EXPIRED' },
        { bank_id: 'b823bbb8-4e46-44c6-bad2-4a70c3404e47', status: 'READY_TO_FUND' },
        { bank_id: '9f03955e-c9b1-40be-8fe2-07029ecdec52', status: 'PENDING_OFFER' },
        { bank_id: 'fce48337-7341-4579-b187-39aca0353dfe', status: 'PENDING_DELETE' },
      ]),
      expect.not.arrayContaining([
        { bank_id: 'f43a068d-a5fc-42bc-8fb3-0e3f31b314dc', status: 'NEW' },
      ]),
    );
  });
});

or this test

describe('test', () => {
  it('should work', async () => {
    expect.assertions(1);

    expect([
      { bank_id: 'b823bbb8-4e46-44c6-bad2-4a70c3404e47', status: 'READY_TO_FUND' },
      { bank_id: '9f03955e-c9b1-40be-8fe2-07029ecdec52', status: 'PENDING_OFFER' },
      { bank_id: 'f43a068d-a5fc-42bc-8fb3-0e3f31b314dc', status: 'NEW' },
      { bank_id: '8b86143a-e319-4655-855b-ac2090219a9b', status: 'FUNDING_EXPIRED' },
      { bank_id: 'b2e77e4d-d027-4aa8-ae31-f975deb34ea4', status: 'FUNDING_EXPIRED' },
      { bank_id: 'fce48337-7341-4579-b187-39aca0353dfe', status: 'PENDING_DELETE' }
    ]).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ bank_id: '8b86143a-e319-4655-855b-ac2090219a9b', status: 'FUNDING_EXPIRED' }),
        expect.objectContaining({ bank_id: 'b2e77e4d-d027-4aa8-ae31-f975deb34ea4', status: 'FUNDING_EXPIRED' }),
        expect.objectContaining({ bank_id: 'b823bbb8-4e46-44c6-bad2-4a70c3404e47', status: 'READY_TO_FUND' }),
        expect.objectContaining({ bank_id: '9f03955e-c9b1-40be-8fe2-07029ecdec52', status: 'PENDING_OFFER' }),
        expect.objectContaining({ bank_id: 'fce48337-7341-4579-b187-39aca0353dfe', status: 'PENDING_DELETE' }),
        expect.not.objectContaining({ bank_id: 'f43a068d-a5fc-42bc-8fb3-0e3f31b314dc', status: 'NEW' }),
      ]),
    );
  });
});

Expected behavior

It should fail because it is not expecting an object that is found

Actual behavior

The tests pass

Additional context

No response

Environment

System:
    OS: macOS 26.0.1
    CPU: (10) arm64 Apple M1 Pro
  Binaries:
    Node: 22.14.0 - ~/.local/state/fnm_multishells/2314_1759760781156/bin/node
    npm: 10.9.2 - ~/.local/state/fnm_multishells/2314_1759760781156/bin/npm
  npmPackages:
    jest: 30.2.0 => 30.2.0

[hainenber]

Actually I don't think it's a bug. Let me use your second example,

describe('test', () => {
  it('should work', async () => {
    expect.assertions(1);

    expect([
      { bank_id: 'b823bbb8-4e46-44c6-bad2-4a70c3404e47', status: 'READY_TO_FUND' },
      { bank_id: '9f03955e-c9b1-40be-8fe2-07029ecdec52', status: 'PENDING_OFFER' },
      { bank_id: 'f43a068d-a5fc-42bc-8fb3-0e3f31b314dc', status: 'NEW' },
      { bank_id: '8b86143a-e319-4655-855b-ac2090219a9b', status: 'FUNDING_EXPIRED' },
      { bank_id: 'b2e77e4d-d027-4aa8-ae31-f975deb34ea4', status: 'FUNDING_EXPIRED' },
      { bank_id: 'fce48337-7341-4579-b187-39aca0353dfe', status: 'PENDING_DELETE' }
    ]).toEqual(
      expect.arrayContaining([
        expect.objectContaining({ bank_id: '8b86143a-e319-4655-855b-ac2090219a9b', status: 'FUNDING_EXPIRED' }),
        expect.objectContaining({ bank_id: 'b2e77e4d-d027-4aa8-ae31-f975deb34ea4', status: 'FUNDING_EXPIRED' }),
        expect.objectContaining({ bank_id: 'b823bbb8-4e46-44c6-bad2-4a70c3404e47', status: 'READY_TO_FUND' }),
        expect.objectContaining({ bank_id: '9f03955e-c9b1-40be-8fe2-07029ecdec52', status: 'PENDING_OFFER' }),
        expect.objectContaining({ bank_id: 'fce48337-7341-4579-b187-39aca0353dfe', status: 'PENDING_DELETE' }),
        expect.not.objectContaining({ bank_id: 'f43a068d-a5fc-42bc-8fb3-0e3f31b314dc', status: 'NEW' }),
      ]),
    );
  });
});

Based on the doc, you can see that arrayContaining is OK with the expected array to be subset of the received array, which is the one with literal values on the left side. The thing is thatexpect.not.objectContaining would match with other 5 entries except for the one with NEW status, making the right side array to be compliant with the doc/spec.

Apologies if my explanation sounds convoluted!

P/s: The first test is a bit against the spec as .toEqual() would only use the 1st argument :D