如何用Java语言编写Java8谓词和distinctByKeys的Mockito测试

<dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-core</artifactId>
    <version>3.12.4</version>
    <scope>test</scope>
</dependency>

import org.junit.Test;
import org.mockito.Mockito;

import java.util.Arrays;
import java.util.List;
import java.util.stream.Collectors;

import static org.junit.Assert.assertEquals;
import static org.mockito.Mockito.when;

public class PersonTest {

    @Test
    public void testFilterAndDistinct() {
        // 创建模拟对象
        Person person1 = Mockito.mock(Person.class);
        Person person2 = Mockito.mock(Person.class);
        Person person3 = Mockito.mock(Person.class);

        // 设置模拟对象的属性
        when(person1.getAge()).thenReturn(20);
        when(person2.getAge()).thenReturn(25);
        when(person3.getAge()).thenReturn(15);

        // 创建Person列表
        List<Person> personList = Arrays.asList(person1, person2, person3);

        // 使用Java8谓词和distinctByKeys进行筛选和去重
        List<Person> filteredAndDistinctList = personList.stream()
                .filter(p -> p.getAge() >= 18)
                .distinct()
                .collect(Collectors.toList());

        // 验证结果
        assertEquals(2, filteredAndDistinctList.size());
        assertEquals(person1, filteredAndDistinctList.get(0));
        assertEquals(person2, filteredAndDistinctList.get(1));
    }
}