How match two arrays witch contain array of objects in jest

Question

I send data to server and match returned data with sent data. If use expect.arrayContaining(array) to compare options and nested variants it swears on ids and fields that add db. How compare objects with arrays which contain arrays of objects ?

Example

Data to send:

{
  "name": "red dress",
  "options": Array [
    Object {
      "name": "size",
      "variants": Array [
        Object {
          "name": "M",
        },
        Object {
          "name": "L",
        },
        Object {
          "name": "S",
        },
      ],
    },
  ],
}

Returned data:

{
  "id": "dc67efd8-dcc4-43df-a8eb-9d95ea641749",
  "name": "red dress",
  "options": Array [
    Object {
      "id": 1,
      "name": "size",
      "productId": "dc67efd8-dcc4-43df-a8eb-9d95ea641749",
      "variants": Array [
        Object {
          "id": 1,
          "name": "M",
          "optionId": 1,
        },
        Object {
          "id": 5,
          "name": "S",
          "optionId": 1,
        },
        Object {
          "id": 6,
          "name": "L",
          "optionId": 1,
        },
      ],
    },
  ],
}

Test:

expect(body.data).toMatchObject(productData)

The answer below was not what I was looking for. This however did the trick perfectly and gives two solutions: what you need in the Jest expect, and how to extend Jest if you need this functionality in multiple tests medium.com/@andrei.pfeiffer/… — frederj
– frederj, Commented Apr 15, 2020 at 16:00

Jack Barry · Accepted Answer · 2018-10-22 18:01:47Z

1

Maybe you could use a forEach loop to check the relevant data? I presume from your sent data that what matters is the provided options and variants are included in the response.

it('has provided options', () => {
  sent.options.forEach(o => {
    expect(received.options).toContainEqual(
      expect.objectContaining({ name: o.name })
    )
  })
})

Similarly for the variants:

it('has provided variants', () => {
  sent.options[0].variants.forEach(v => {
    expect(received.options[0].variants).toContainEqual(
      expect.objectContaining(v)
    )
  })
})

answered Oct 22, 2018 at 18:01

Jack Barry

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Comments

Sebastien Horin · Accepted Answer · 2020-05-13 03:48:34Z

0

use a map to filter only the key you want to check

something like:

expect(yourResponseObject.options.variants.map(e=>({e.name}))).to.include(["blue","red", ... ]);

https://www.chaijs.com/api/bdd/

answered May 13, 2020 at 3:48

Sebastien Horin

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