How can I test part of object using Jest?

I would like to test that time is parsed correctly and I am only interested in checking some of the properties and not the entire object. In this case hour and minutes.

I tried using expect(object).toContain(value) but as you can see in the snippet below it fails although the object contains the properties I am interested in and they have the correct value.

● Calendar > CalendarViewConfig › it should parse time

expect(object).toContain(value)

Expected object:
  {"display": "12:54", "full": 774, "hour": 12, "hours": 12, "minutes": 54, "string": "12:54"}
To contain value:
  {"hours": 12, "minutes": 54}

  67 |   it('it should parse time', () => {
  68 |     ...
> 69 |     expect(parseTime('12:54')).toContain({ hours: 12, minutes: 54})
  70 |   })

  at Object.<anonymous> (src/Components/Views/Calendar/CalendarViewConfig.test.js:69:32)

To check if expected object is a subset of the received object you need to use toMatchObject(object) method:

expect(parseTime('12:54')).toMatchObject({ hours: 12, minutes: 54})

or expect.objectContaining(object) matcher:

expect(parseTime('12:54')).toEqual(expect.objectContaining({ hours: 12, minutes: 54}))

they works in slightly different ways, please take a look at https://stackoverflow.com/questions/45692456/whats-the-difference-between-tomatchobject-and-objectcontaining for details.

toContain() is designed to check that an item is in an array.

If you want to test for part of an object inside an array of objects, use objectContaining within arrayContaining. Here's an example:

test( 'an object in an array of objects', async () => {
  const bookData = [
    {
      id: 1,
      book_id: 98764,
      book_title: 'My New International Book',
      country_iso_code: 'IN',
      release_date: '2022-05-24'
    },
    {
      id: 2,
      book_id: 98764,
      book_title: 'My New International Book',
      country_iso_code: 'GB',
      release_date: '2022-05-31'
    },
    {
      id: 3,
      book_id: 98764,
      book_title: 'My New International Book',
      country_iso_code: 'US',
      release_date: '2022-06-01'
    }
  ];

  expect( bookData ).toEqual( 
    expect.arrayContaining([ 
      expect.objectContaining(
        {
          country_iso_code: 'US',
          release_date: '2022-06-01'
        } 
      )
    ])
  );
} );

I got this from this Medium article.