Question

我正在尝试创建一个断言方法，使有问题的对象只包含标量值（即字符串或数字等简单值）。可以使用JSON.stringify（）。

示例PASSED：

var expected = {foo: 5, bar: 6};
var actual = {foo: 5, bar: 6}
objectAssert(actual, expected, 'detects that two objects are equal');
// console output:
// passed

示例失败：

var expected = {foo: 6, bar: 5};
var actual = {foo: 5, bar: 6}
objectAssert(actual, expected, 'detects that two objects are equal');
// console output:
// FAILED [my test] Expected {"foo":6,"bar":5}, but got {"foo":5,"bar":6}

到目前为止，这是我的功能：

function objectAssert(actual, expected, testName) {

 if(actual !== expected){
    console.error( "FAIL [" + testName + "] Expected \"" + expected + ", \" but got \"" + actual + "\"");
  } else {
    console.info( "SUCCESS [" + testName + "]");
  }
}

知道我在这里缺少什么吗？

Answer 1

使用!==来比较对象是错误的。我建议的是，就像你在问题中提到的那样，使用JSON.stringify比较两个对象。

示例：

function objectAssert(actual, expected, testName) {

    _actual = JSON.stringify(actual);
    _expected = JSON.stringify(expected);

    if(_actual != _expected)
      console.error( "FAIL [" + testName + "] Expected \"" + expected + ", \" but got \"" + actual + "\"");
    else
      console.info( "SUCCESS [" + testName + "]");
}

Answer 2

您可以比较json字符串对象：

if(JSON.stringify(actual) !== JSON.stringify(expected)){
   console.error( "FAIL [" + testName + "] Expected \"" + JSON.stringify(expected) + ", \" but got \"" + JSON.stringify(actual) + "\"");
} else {
  console.info( "SUCCESS [" + testName + "]");
}

写对象的断言

2 个答案: