如何重复/循环通过摩卡测试

Question

我一直在做一些mocha/chai测试,除了在每个'it'测试中放置一个循环并迭代一次和一次之外,我仍然没有找到一种在许多不同可能性上运行测试的好方法.问题是,如果我有数十或数百个测试,我不想一遍又一遍地写相同的for循环.

有更优雅的方式吗？特别是一个用不同的测试参数一次遍历所有测试的？

describe('As a dealer, I determine how many cards have been dealt from the deck based on', function(){

  console.log(this);

  beforeEach(function(){
    var deck = new Deck();
    var myDeck = deck.getCards();
  });


    it('the number of cards are left in the deck', function(){
      for(var i = 1; i<=52; i++){
        myDeck.dealCard();
        expect(myDeck.countDeck()).to.equal(52-i);
      }
    });

    it('the number of cards dealt from the deck', function(){
      expect(myDeck.countDealt()).to.equal(i);
    });

    it('the sum of the cards dealt and the cards left in the deck', function(){
      expect(myDeck.countDeck() + myDeck.countDealt()).to.equal(52)
    });

});

Answer 1

我在Loop Mocha测试中实现了neezer的解决方案？,包括将整个测试放入闭包并用循环执行.

请注意,循环在函数中使用beforeEach(),因为它每次测试执行52次.如果这些元素是动态的,并且每个循环不会执行多次,那么将元素放在beforeEach()函数中并不是一个好主意.

代码看起来像这样,它似乎工作.

var myDeck = new Deck(Card);

function _Fn(val){

    describe('As a dealer, I determine how many cards have been dealt from the deck based on', function(){

      myDeck.dealCard();

      var cardCount = 0;
      var dealtCount = 0;

      cardCount = myDeck.countDeck();
      dealtCount = myDeck.countDealt();

      it('the number of cards are left in the deck', function(){
        expect(cardCount).to.equal(52-val);
      });

      it('the number of cards dealt from the deck', function(){
        expect(dealtCount).to.equal(val);
      });

      it('the sum of the cards dealt and the cards left in the deck', function(){
        expect(cardCount + dealtCount).to.equal(52);
      });

    });

}

for(var i = 1; i<=52; i++){
  _Fn(i);
}