如何解决Assertj:如何按对象内容比较2个对象列表?
class Pair{
int x;
int y;
}
List l1 = Arrays.asList(new Match(1,2),new Match(1,3),new Match(2,3));
List l2 = Arrays.asList(new Match(1,3));
如何比较列表的内容? 到目前为止,我使用的所有方法都会检查对象本身是否相等,而不是对象值:
assertthat(l1).isEqualTo(l2);
assertthat(l1).containsAll(l2);
assertthat(l1).containsExactly(values);
assertthat(l1).containsExactlyElementsOf(iterable);
我必须为Match类实现equals()方法吗?
这可能是正确的方法吗?
for (int i = 0; i < l1.size(); i++){
assertthat(l1.get(i)).usingRecursiveComparison().isEqualTol2.get(i));
}
请告知。 谢谢!
解决方法
我猜你应该重写equals()和hashCode()
,尝试使用usingRecursiveFieldByFieldElementComparator(recursiveConfiguration)
,它可以与所有可迭代的断言进行递归比较。
例如:
public class Person {
String name;
boolean hasPhd;
}
public class Doctor {
String name;
boolean hasPhd;
}
Doctor drSheldon = new Doctor("Sheldon Cooper",true);
Doctor drLeonard = new Doctor("Leonard Hofstadter",true);
Doctor drRaj = new Doctor("Raj Koothrappali",true);
Person sheldon = new Person("Sheldon Cooper",false);
Person leonard = new Person("Leonard Hofstadter",false);
Person raj = new Person("Raj Koothrappali",false);
Person howard = new Person("Howard Wolowitz",false);
List<Doctor> doctors = list(drSheldon,drLeonard,drRaj);
List<Person> people = list(sheldon,leonard,raj);
RecursiveComparisonConfiguration configuration = RecursiveComparisonConfiguration.builder()
.withIgnoredFields("hasPhd")
.build();
// assertion succeeds as both lists contains equivalent items in order.
assertThat(doctors).usingRecursiveFieldByFieldElementComparator(configuration)
.contains(sheldon);
有关详细说明,请参见https://assertj.github.io/doc/#assertj-core-recursive-comparison-for-iterable。
, @vincentdep是正确的。如果您使用的是Java 14或更高版本,则可以使用record
类:
public record Pair(int x,int y){};
List l1 = Arrays.asList(new Pair(1,2),new Pair(1,3),new Pair(2,3));
List l2 = Arrays.asList(new Pair(1,3));
assertThat(l1).isEqualTo(l2);
assertThat(l1).containsAll(l2);
,
是的,所以在进一步研究之后,我建议:
for (int i = 0; i < l1.size(); i++){
assertThat(l1.get(i)).usingRecursiveComparison().isEqualTol2.get(i));
}
您可以阅读详细信息:
https://assertj.github.io/doc/#assertj-core-recursive-comparison
谢谢
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