java - 使用assertJ方法 containsOnly() 比较自定义对象的数组

Question

我的自定义对象如下所示:

@Accessors(chain = true)
@Getter
@Setter
@AllArgsConstructor
@ToString
public class SocialLink {

    private String platform;

    private String link;
}

我的测试代码如下所示:

SocialLink[] arr1 = new SocialLink[] {
        new SocialLink("Facebook", "Facebook Link"),
        new SocialLink("Google", "Google Link")
};
SocialLink[] arr2 = new SocialLink[] {
        new SocialLink("Google", "Google Link"),
        new SocialLink("Facebook", "Facebook Link")
};
assertThat(arr1).containsOnly(arr2);

失败日志:

java.lang.AssertionError: 
Expecting:
  <[SocialLink(platform=Facebook, link=Facebook Link),
    SocialLink(platform=Google, link=Google Link)]>
to contain only:
  <[SocialLink(platform=Google, link=Google Link),
    SocialLink(platform=Facebook, link=Facebook Link)]>
elements not found:
  <[SocialLink(platform=Google, link=Google Link),
    SocialLink(platform=Facebook, link=Facebook Link)]>
and elements not expected:
  <[SocialLink(platform=Facebook, link=Facebook Link),
    SocialLink(platform=Google, link=Google Link)]>

containsOnly() 方法可以很好地处理字符串数组，但为什么它不适用于自定义对象数组？

Answer 1

如果您不想或无法覆盖 equals，则可以尝试调用 usingRecursiveComparison 或更细粒度的替代方法 ignoringOverriddenEqualsForTypes、ignoringOverriddenEqualsForFields 或 ignoringOverriddenEqualsForFieldsMatchingRegexes

 assertThat(links1).usingRecursiveComparison()
                   .ignoringCollectionOrder() 
                   .isEqualTo(expectedLinks);

请注意，递归比较目前仅提供 isEqualTo 断言。

参见https://assertj.github.io/doc/#assertj-core-recursive-comparison了解详情。