如何在RxJava 2中使用TestObserver对对象列表进行单元测试?

这是一个 人员类别 用于固定人和物体。它具有可比较的实现进行比较。

public class Person implements Comparable<Person> {

    private String firstName = "";
    private String lastName = "";

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

    @Override
    public int compareTo(@NonNull Person person) {
        return this.firstName.compareTo(person.getFirstName());
    }

    public String getFirstName() {
        return firstName;
    }

    public void setFirstName(String firstName) {
        this.firstName = firstName;
    }

    public String getLastName() {
        return lastName;
    }

    public void setLastName(String lastName) {
        this.lastName = lastName;
    }
}

这是一个 用于创建人员列表和人员列表可观察对象的工厂类 . 它总是创造同一组人。

import java.util.ArrayList;
import io.reactivex.Observable;

public class PeopleFactory {

    public static ArrayList<Person> createPeople() {
        ArrayList<Person> people = new ArrayList<>();

        for (int i=0; i<10; i++) {
            people.add(new Person("Thanks" + i, "Giving" + i));
        }

        return people;
    }

    public static Observable<ArrayList<Person>> createPersonObservable() {
        return Observable.just(createPeople());
    }
}

现在我想用 RxJava 2中的TestObserver,根据可观察的人员发出的人员列表测试人员列表 .

import org.junit.Test;
import java.util.ArrayList;
import io.reactivex.Observable;
import io.reactivex.observers.TestObserver;


public class PersonTest {
    @Test
    public void testPeople() {
        // Creating a people Observable
        Observable<ArrayList<Person>> peopleObservable = PeopleFactory.createPersonObservable();

        // Creating an test observer and subscribe to the above peopleObservable
        TestObserver<ArrayList<Person>> observer = new TestObserver<>();
        peopleObservable.subscribe(observer);

        // Creating the same people list and assert this people list with the people list from the peopleObservable
        ArrayList<Person> people = PeopleFactory.createPeople();
        observer.assertValue(people);
    }
}

我希望这个测试能够通过,因为PeopleFactory正在为一个普通的人员列表和一个可观察的人员列表创建相同的人员集,而Person类有一个Comparable,它表示只要名字相等,对象就会相等。

但是 测试忽略了这个可比性,将其与对象地址进行比较 ,并给了我以下测试失败消息:

java.lang.AssertionError: Expected: [com.example.myapplication.Person@7006c658, com.example.myapplication.Person@34033bd0, com.example.myapplication.Person@47fd17e3, com.example.myapplication.Person@7cdbc5d3, com.example.myapplication.Person@3aa9e816, com.example.myapplication.Person@17d99928, com.example.myapplication.Person@3834d63f, com.example.myapplication.Person@1ae369b7, com.example.myapplication.Person@6fffcba5, com.example.myapplication.Person@34340fab] (class: ArrayList), Actual: [com.example.myapplication.Person@2aafb23c, com.example.myapplication.Person@2b80d80f, com.example.myapplication.Person@3ab39c39, com.example.myapplication.Person@2eee9593, com.example.myapplication.Person@7907ec20, com.example.myapplication.Person@546a03af, com.example.myapplication.Person@721e0f4f, com.example.myapplication.Person@28864e92, com.example.myapplication.Person@6ea6d14e, com.example.myapplication.Person@6ad5c04e] (class: ArrayList) (latch = 0, values = 1, errors = 0, completions = 1)

    at io.reactivex.observers.BaseTestConsumer.fail(BaseTestConsumer.java:163)
    at io.reactivex.observers.BaseTestConsumer.assertValue(BaseTestConsumer.java:332)
    at com.example.myapplication.PersonTest.testPeople(PersonTest.java:21)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at org.junit.runners.model.FrameworkMethod$1.runReflectiveCall(FrameworkMethod.java:50)
    at org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)
    at org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)
    at org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)
    at org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)
    at org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)
    at org.junit.runners.ParentRunner$3.run(ParentRunner.java:290)
    at org.junit.runners.ParentRunner$1.schedule(ParentRunner.java:71)
    at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)
    at org.junit.runners.ParentRunner.access$000(ParentRunner.java:58)
    at org.junit.runners.ParentRunner$2.evaluate(ParentRunner.java:268)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.junit.runner.JUnitCore.run(JUnitCore.java:137)
    at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:68)
    at com.intellij.rt.execution.junit.IdeaTestRunner$Repeater.startRunnerWithArgs(IdeaTestRunner.java:51)
    at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:242)
    at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:70)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:62)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:498)
    at com.intellij.rt.execution.application.AppMainV2.main(AppMainV2.java:131)

所以 在RxJava 2中使用TestObserver对对象列表进行单元测试的正确方法是什么?

注意:以上所有代码都是在Android Studio中编写的。