Junit测试Loop

Question

我正在教自己Junit测试，我正在努力为以下代码创建测试

 private ArrayList<AirbnbListing> List;

   public int getAvgReviews(){
    int sums = 0;
    for (int i = 0 ; i < List.size(); i++){
        AirbnbListing houses = List.get(i);
        if(houses.getPrice() >= fromValue && houses.getPrice() <= toValue){
            sums += houses.getNumberOfReviews();
        }
    }
    return (sums/getNoOfProperties());
}

有人可以帮我吗

Answer 1

首先，您的列表未初始化。您可能希望更改您的功能以接受列表以启动类似

public int getAvgReviews(List<AirbnbListing> listings){ ... }

从那里，我们可以编写一个简单或复杂的JUnit。例如：

@Test
public void simpleTest1(){
    List<AirbnbListing> list = new List<AirbnbListing>();
    // populate your list here with test elements
    // ie list.add(new AirbnbListing(...)); as many as needed

    // now if your list is 3 elements long with review ratings of [4, 5, 6],
    // we would want to test the assertion that getAvgReviews(list) is equal to 5

    assertTrue(getAvgReviews(list) == 5);
    // ... more assertions here if needed
}