<dependency>
    <groupId>org.mockito</groupId>
    <artifactId>mockito-core</artifactId>
    <version>2.8.9</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-module-junit4</artifactId>
    <version>1.7.4</version>
    <scope>test</scope>
</dependency>
<dependency>
    <groupId>org.powermock</groupId>
    <artifactId>powermock-api-mockito2</artifactId>
    <version>1.7.4</version>
    <scope>test</scope>
</dependency>

@Component
public class StudentService {

    @Resource
    private StudentDao studentDao;

    public List<StudentBo> queryStudentScoreByKeyword(String name) {
        System.out.println("invoke StudentService.queryStudentScoreByKeyword ...");

        List<StudentBo> cacheList = RedisUtils.getArray(name, StudentBo.class);
        if (CollectionUtils.isNotEmpty(cacheList)) {
            return cacheList;
        }
        String keyword = processKeyword(name);
        List<Student> students = studentDao.queryStudentByKeyWord(keyword);
        List<Integer> ids = students.stream().map(Student::getId).collect(Collectors.toList());
        List<Person> personList = SchoolManageProxy.getInstance().queryPerson(ids);

        List<StudentBo> studentBos = CommonUtils.toBo(personList, students);
        // 高亮結(jié)果
        highlightResult(studentBos, name);
        // 緩存到Redis
        RedisUtils.setArray(name, studentBos, 10 * 60);
        return studentBos;
    }

    private String processKeyword(String name) {
        System.out.println("invoke StudentService.processKeyword ...");
        String newName = name;
        // do somethings
        return newName;
    }

    private void highlightResult(List<StudentBo> result, String name) {
        System.out.println("invoke StudentService.highlightResult ...");
        // do keyword highlight
    }

}

@RunWith(PowerMockRunner.class)
@PrepareForTest({SchoolManageProxy.class, RedisUtils.class, StudentService.class})
// @PowerMockIgnore({"javax.management.*", "javax.net.ssl.*"})
@SuppressStaticInitializationFor({"cn.ganzhiqiang.ares.unittest.SchoolManageProxy"})
public class StudentServiceTest {

    @Mock
    private StudentDao mockStudentDao;

    @InjectMocks
    private StudentService studentServiceUnderTest;

    @Before
    public void setUp() {
        initMocks(this);
    }

    @Test
    public void testQueryStudentScoreByKeyword() throws Exception {
        studentServiceUnderTest = PowerMockito.spy(studentServiceUnderTest);
        PowerMockito.mockStatic(RedisUtils.class);
        PowerMockito.mockStatic(SchoolManageProxy.class);

        // mock單例調(diào)用
        SchoolManageProxy mockSchoolManageProxy = PowerMockito.mock(SchoolManageProxy.class);
        PowerMockito.when(SchoolManageProxy.getInstance()).thenReturn(mockSchoolManageProxy);
        when(mockSchoolManageProxy.queryPerson(anyList())).thenReturn(Collections.emptyList());

        // mock掉對(duì)Redis的靜態(tài)調(diào)用
        PowerMockito.when(RedisUtils.getArray(eq("tom"), eq(StudentBo.class))).thenReturn(Collections.emptyList());
        // 顯示的mock掉靜態(tài)的void的方法（可以不mock）
        PowerMockito.doNothing().when(RedisUtils.class, "setArray", anyString(), anyList(), anyInt());

        // mock私有方法processKeyword
        PowerMockito.doReturn("tom").when(studentServiceUnderTest, "processKeyword", anyString());

        // 跳過(guò)私有方法highlightResult的執(zhí)行
        PowerMockito.suppress(PowerMockito.method(StudentService.class, "highlightResult"));

        // 使用Mockito來(lái)mock服務(wù)的調(diào)用
        when(mockStudentDao.queryStudentByKeyWord(anyString())).thenReturn(Collections.emptyList());

        // Run the test
        final List<StudentBo> result = studentServiceUnderTest.queryStudentScoreByKeyword("tom");

    }
}

// 使用Mockito來(lái)mock服務(wù)的調(diào)用 
when(mockStudentDao.queryStudentByKeyWord(anyString())).thenReturn(Collections.emptyList());

PowerMockito.mockStatic(RedisUtils.class);
// mock掉對(duì)Redis的靜態(tài)調(diào)用
PowerMockito.when(RedisUtils.getArray(eq("tom"), eq(StudentBo.class))).thenReturn(Collections.emptyList());
// 顯式的mock掉靜態(tài)的void的方法（可以不mock）
PowerMockito.doNothing().when(RedisUtils.class, "setArray", anyString(), anyList(), anyInt());

PowerMockito.mockStatic(SchoolManageProxy.class);
// Powermock mock出單例類
SchoolManageProxy mockSchoolManageProxy = PowerMockito.mock(SchoolManageProxy.class);
// 給單例類的getInstance方法打樁

PowerMockito.when(SchoolManageProxy.getInstance()).thenReturn(mockSchoolManageProxy);
// 對(duì)mock類queryPerson的方法打樁
when(mockSchoolManageProxy.queryPerson(anyList())).thenReturn(Collections.emptyList());

// mock 實(shí)例
// spy的標(biāo)準(zhǔn)是：如果不打樁，默認(rèn)執(zhí)行真實(shí)的方法，如果打樁則返回樁實(shí)現(xiàn)。
studentServiceUnderTest = PowerMockito.spy(studentServiceUnderTest);
// mock私有方法processKeyword
// doReturn(...) when(...)不做真實(shí)調(diào)用，但是when(...) thenReturn(...)還是會(huì)真實(shí)調(diào)用原方法，只是返回了指定的結(jié)果
PowerMockito.doReturn("tom").when(studentServiceUnderTest, "processKeyword", anyString());

// 跳過(guò)私有方法highlightResult的執(zhí)行
PowerMockito.suppress(PowerMockito.method(StudentService.class, "highlightResult"));