单元测试应该“通过”？为什么会失败？

Question

  function renderInventory(inventory) {
  //create a flat list
  var flatList = '';
  //iterate over the inventory
  for (var i = 0; i < inventory.length; i++) {
    var designerObject = inventory[i];
    var shoes = designerObject.shoes;
    //iterate over the each shoe in the array
    for (var j = 0; j < shoes.length; j++) {
      var currentShoe = shoes[j];
      //add the designer name, the shoe name, and the shoe price and the new line
      flatList = designerObject.name +", " + currentShoe.name +", " + currentShoe.price + '\n';
    } 
  }
  //return the flat list
  return flatList;
}
//assertion Function
function assertEqual(actual, expected, testName) {
  if (actual === expected) {
  console.log('passed');
  } else {
  console.log('FAILED [' + testName + '] Expected "' + expected + '", but got "' + actual + "'");
  }
}

//test cases

var currentInventory = [{
    name: 'Brunello Cucinelli',
    shoes: [
      {name: 'tasselled black low-top lace-up', price: 1000},
      {name: 'tasselled green low-top lace-up', price: 1100},
      {name: 'plain beige suede moccasin', price: 950},
      {name: 'plain olive suede moccasin', price: 1050}
    ]
  },
  {
    name: 'Gucci',
    shoes: [
      {name: 'red leather laced sneakers', price: 800},
      {name: 'black leather laced sneakers', price: 900}
    ]
  }
];

var actualFlatList = renderInventory(currentInventory);

var expectedFlatList = 'Brunello Cucinelli, tasselled black low-top lace-up, 1000\nBrunello Cucinelli, tasselled green low-top lace-up, 1100\nBrunello Cucinelli, plain beige suede moccasin, 950\nBrunello Cucinelli, plain olive suede moccasin, 1050\nGucci, red leather laced sneakers, 800\nGucci, black leather laced sneakers, 900\n';

assertEqual(actualFlatList, expectedFlatList, "should render flat list of inventory items");

结果： 失败 [应呈现库存物品的平面列表] 预期“Brunello Cucinelli，流苏黑色低帮系带，1000 Brunello Cucinelli，流苏绿色低帮系带，1100 Brunello Cucinelli，纯米色绒面革莫卡辛鞋，950 Brunello Cucinelli，纯橄榄色绒面革莫卡辛鞋，1050 Gucci，红色皮革系带运动鞋，800 Gucci，黑色皮革系带运动鞋，900 ”，但得到了“Gucci，黑色皮革系带运动鞋，900 '

我尝试正确添加我的代码。希望我做对了。我是编码新手。我的问题是，这个单元测试代码块应该给出'passed'。我哪里做错了？有人可以澄清一下吗？

Answer 1

我刚刚发现了问题。 flatList **+=** designerObject.name + ", " + currentShoe.name + ", " + currentShoe.price + '\n'; 它在函数 renderInventory(inventory) 中缺少一个附加项。谢谢！