Hamcrest-Matchers.hasProperty：收到奇怪的错误：java.lang.AssertionError：无属性“ firstName”和无属性“ lastName”

问题描述

我已经创建了一个类别Item，并且想要检查Item类的属性 “ firstName”是“ test”，“ lastName”是“ best”，但是我得到了 以下错误。我不是真的在这里出了什么问题。我有 毫无疑问是否需要执行以下操作。

1. 我是否需要为firstName和lastName覆盖相等的方法。
2. 是否有可能发生罐子冲突
3. 或者我想念一些东西

谢谢。

这是我的代码：

@Test
  public void testName(){
    List<Item> items = new ArrayList<Item>();
    Item item1= new Item("test","best");
    Item item2= new Item("test","best");
    Item item3= new Item("test","best");
    items = Arrays.asList(item1,item2,item3);
    assertthat(items,hasItems(allOf(Matchers.<Item>hasProperty("firstName",is("test")),Matchers.<Item>hasProperty("lastName",is("best")))));
  }

课程项目{

  public Item(){}
  public Item(String firstName,String lastName){
    this.firstName=firstName;
    this.lastName=lastName;
  }
  private String firstName;
  private String lastName;

  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }

    if (obj.getClass() != this.getClass()) {
      return false;
    }

    final Item other = (Item) obj;
    if ((this.firstName == null) ? (other.firstName != null) : !this.firstName.equals(other.firstName)) {
      return false;
    }

    return true;
  }

  @Override
  public int hashCode() {
    int hash = 3;
    hash = 53 * hash + (this.firstName != null ? this.firstName.hashCode() : 0);
    return hash;
  }
}

我收到以下错误消息：

Expected: (a collection containing (hasProperty("firstName",is "test") and hasProperty("lastName",is "best")))
     but: a collection containing (hasProperty("firstName",is "best")) hasProperty("firstName",is "test") No property "firstName",hasProperty("firstName",is "test") No property "firstName"
java.lang.AssertionError: 
Expected: (a collection containing (hasProperty("firstName",is "test") No property "firstName"
    at org.hamcrest.MatcherAssert.assertthat(MatcherAssert.java:20)
    at org.hamcrest.MatcherAssert.assertthat(MatcherAssert.java:8)
    at ImportTest.testName(ImportTest.java:220)
    at java.base/jdk.internal.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at 

解决方法

我终于能够解决问题。问题是我有 在同一个类中创建了Item类，但它不是公开的。我创造了我的 Item类是一个单独的java类，并将其公开，并且对我有用。

public class Item {

  public Item(){}
  public Item(String firstName,String lastName){
    this.firstName=firstName;
    this.lastName=lastName;
  }
  private String firstName;
  private String lastName;


// here is the public getter and setters

  @Override
  public boolean equals(Object obj) {
    if (obj == null) {
      return false;
    }

    if (obj.getClass() != this.getClass()) {
      return false;
    }

    final Item other = (Item) obj;
    if ((this.firstName == null) ? (other.firstName != null) : !this.firstName.equals(other.firstName)) {
      return false;
    }

    return true;
  }

  @Override
  public int hashCode() {
    int hash = 3;
    hash = 53 * hash + (this.firstName != null ? this.firstName.hashCode() : 0);
    return hash;
  }
}