CODEWITHSUNDEEP
mocha.jschai
Sushil Verma
Sushil Verma

Reputation: 697

Expect one of two object with deep equal

With Chai expect, I am trying to compare API response with expected response. The expected response of API changes with time and can be one of two possible static JSONs.

Is there any way in Chai, to expect one of these two JSONs?

I know that it works perfectly fine with single value: expect(actualResponse).to.deep.equal(expectedJson);

But I want something like: expect(actualResponse).to.deep.equal(expectedJson1, expectedJson2);

Upvotes: 0

Views: 975

Answers (1)

Lin Du
Lin Du

Reputation: 102247

You could use .satisfy(matcher[, msg]) method of chai.

E.g.

import { expect } from 'chai';
import _ from 'lodash';

describe('63811326', () => {
  it('should pass', () => {
    function genResponse() {
      const successResponse = {
        data: {},
        success: true,
      };
      const failResponse = {
        success: false,
        errorMessage: 'API error',
      };
      return Math.random() > 0.5 ? failResponse : successResponse;
    }

    const expectedJson1 = { data: {}, success: true };
    const expectedJson2 = { success: false, errorMessage: 'API error' };
    expect(genResponse()).to.satisfy((actualResponse) => {
      console.log(actualResponse);
      return _.isEqual(actualResponse, expectedJson1) || _.isEqual(actualResponse, expectedJson2);
    });
  });
});

unit test result for the first execution:

  63811326
{ success: false, errorMessage: 'API error' }
    ✓ should pass


  1 passing (26ms)

unit test result for the second execution:

  63811326
{ data: {}, success: true }
    ✓ should pass


  1 passing (31ms)

Upvotes: 3

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