Hamcrest - Matchers.hasProperty：得到一个奇怪的错误：java.lang.AssertionError：没有属性“firstName”和没有属性“lastName”

Question

我创建了一个类 Item，想检查 Item 类属性“firstName”是否为“test”，“lastName”是否为“best”，但出现以下错误。 我并没有真正明白这里出了什么问题。 我几乎不怀疑是否需要完成以下事情。

1. 我是否需要覆盖 firstName 和 lastName 的相等方法。
2. 是否有可能发生 jar 冲突
3. 或者我错过了什么

提前致谢。

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")))));
  }

类项目{

  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：

Expected: (a collection containing (hasProperty("firstName", is "test") and hasProperty("lastName", is "best")))
     but: a collection containing (hasProperty("firstName", is "test") and hasProperty("lastName", is "best")) hasProperty("firstName", is "test") No property "firstName", 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") and hasProperty("lastName", is "best")))
     but: a collection containing (hasProperty("firstName", is "test") and hasProperty("lastName", is "best")) hasProperty("firstName", is "test") No property "firstName", hasProperty("firstName", is "test") No property "firstName", 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 

Answer 1

我终于能够解决这个问题了。 问题是我在同一个类中创建了 Item 类并且它不是公开的。 我将我的 Item 类创建为一个单独的 Java 类并将其公开，它对我有用。

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;
  }
}