使用 Chai 断言比较两个对象

Question

我有两个混合订单数组

const actualResult = [
  {
    start: '30',
    end: '50',
    locations: ['loc1', 'loc2'],
  },
  {
    start: '20',
    end: '40',
    locations: ['loc3', 'loc4'],
  },
];

const expectedResult = [
  {
    start: '20',
    end: '40',
    locations: ['loc4', 'loc3'],
  },
  {
    start: '30',
    end: '50',
    locations: ['loc2', 'loc1'],
  },
];

我写了下面的代码来使用 chai 断言比较它们

describe('test1', function () {
  it('expect test', function () {
    expect(actualResult).to.have.length(expectedResult.length);
    for (b of expectedResult) {
      var found = false;
      for (d of actualResult) {
        if (b.start == d.start && b.end == d.end) {
          expect(b.locations).to.have.deep.members(d.locations);
          found = true;
        }
      }
      expect(found).to.be.true;
    }
  });
});

效果很好，但我想知道是否有任何直接的 chai 断言可以在一行中执行，例如

expect(actualResult).to.have.all.nested.members(expectedResult);

或更好的建议。

Answer 1

您可以使用 deep-equal-in-any-order 插件。

Chai plugin to match objects and arrays deep equality with arrays (including nested ones) being in any order.

It works in a similar way as deep.equal but it doesn’t check the order of the arrays (at any level of nested objects and arrays). The array elements can be any JS entity (boolean, null, number, string, object, array…).

例如

const deepEqualInAnyOrder = require('deep-equal-in-any-order');
const chai = require('chai');

chai.use(deepEqualInAnyOrder);

const { expect } = chai;

describe('', () => {
  it('should pass', () => {
    const actualResult = [
      {
        start: '30',
        end: '50',
        locations: ['loc1', 'loc2'],
      },
      {
        start: '20',
        end: '40',
        locations: ['loc3', 'loc4'],
      },
    ];

    const expectedResult = [
      {
        start: '20',
        end: '40',
        locations: ['loc4', 'loc3'],
      },
      {
        start: '30',
        end: '50',
        locations: ['loc2', 'loc1'],
      },
    ];

    expect(actualResult).to.deep.equalInAnyOrder(expectedResult);
  });
});

测试结果：

  59308311
    ✓ should pass


  1 passing (23ms)

使用 Chai 断言比较两个对象

Compare two objects using Chai assertions

mocha.js

node.js

chai