监视没有PowerMock的课程

Question

我不想再使用PowerMock。因为Junit5开始嘲笑静态课程。因此，我试图摆脱PowerMock方法。

当我使用PowerMock时，我可以轻松地监视具有私有构造函数的类，然后我称静态方法。

这是我的代码的一部分（当我使用PowerMock时）

@RunWith(PowerMockRunner.class)
@PrepareForTest(MessageValidationUtils.class)
public class MessageValidationServiceTest {

    @Mock
    private CheckpointCustomerService checkpointCustomerService;


    @Mock
    private ProductClientService productClientService;


    @Before
    public void setUp() {
        MockitoAnnotations.openMocks(this);
        PowerMockito.spy(MessageValidationUtils.class);
}

是MessageValidationUtilsss.class的间谍对象后，我正在测试以下内容：

when(MessageValidationUtils.validateTelegramKeyMap(messageProcessDto.getMessageMessageType(),
        messageProcessDto.getMessageKeyValueMap())).thenAnswer((Answer<Boolean>) invocation -> true);

经过一些研究，我找不到与有私人构造师和私人构造师和的班级有关的东西静态方法。

Answer 1

在MockStatic在Mockito中的定义您可以指定设置以默认情况下执行真实执行mockito.withSettings（）。defaultanswer（mockito.calls_real_methods）。这样，您的静态模拟将像间谍一样工作。

让我们创建简单的utils用于测试的类。

public class Utils {
    public static String method1() {
        return "Original mehtod1() value";
    }

    public static String method2() {
        return "Original mehtod2() value";
    }

    public static String method3() {
        return method2();
    }
}

为Method2进行模拟，然后执行Method1和Method3

import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.Test;
import org.mockito.MockedStatic;
import org.mockito.Mockito;

public class SpyStaticTest {
    @Test
    public void spy_static_test() {
        try (MockedStatic<Utils> utilities = Mockito.mockStatic(Utils.class, Mockito.withSettings().defaultAnswer(Mockito.CALLS_REAL_METHODS))) {
            utilities.when(Utils::method2).thenReturn("static mock");

            Assertions.assertEquals(Utils.method1(), "Original mehtod1() value");
            Assertions.assertEquals(Utils.method2(), "static mock");
            Assertions.assertEquals(Utils.method3(), "static mock");
        }
    }
}

示例的真实执行：

    @Test
    public void test() {
        try (MockedStatic<MessageValidationUtils> utilities = Mockito.mockStatic(MessageValidationUtils.class, Mockito.withSettings().defaultAnswer(Mockito.CALLS_REAL_METHODS))) {
            utilities.when(() -> MessageValidationUtils.validateTelegramKeyMap(messageProcessDto.getMessageMessageType(),
                    messageProcessDto.getMessageKeyValueMap())).thenAnswer((Answer<Boolean>) invocation -> true);
            
            //perform testing of your service which uses MessageValidationUtils
        }
    }

更新：

使用模拟> in @beforeeach

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.MockedStatic;
import org.mockito.Mockito;

public class SpyStaticTest {
    MockedStatic<Utils> utilities;
    
    @BeforeEach
    public void setUp() {
        utilities = Mockito.mockStatic(Utils.class, Mockito.withSettings().defaultAnswer(Mockito.CALLS_REAL_METHODS));
    }

    @Test
    public void spy_static_test1() {
        utilities.when(Utils::method2).thenReturn("static mock");

        Assertions.assertEquals(Utils.method1(), "Original mehtod1() value");
        Assertions.assertEquals(Utils.method2(), "static mock");
        Assertions.assertEquals(Utils.method3(), "static mock");

    }

    @Test
    public void spy_static_test2() {
        utilities.when(Utils::method1).thenReturn("static mock");

        Assertions.assertEquals(Utils.method1(), "static mock");
        Assertions.assertEquals(Utils.method2(), "Original mehtod2() value");
        Assertions.assertEquals(Utils.method3(), "Original mehtod2() value");

    }

    @AfterEach
    public void  afterTest() {
        utilities.close();
    }
}

更新：

Mockito不提供静态间谍创建的方法，但是您可以在那里定义自己的UTILS和IMPLEMET间谍静态定义。

import org.mockito.MockedStatic;
import org.mockito.Mockito;

public class MockitoUtils {
    public static <T> MockedStatic<T> spyStatic(Class<T> classToMock) {
        return Mockito.mockStatic(classToMock, Mockito.withSettings().defaultAnswer(Mockito.CALLS_REAL_METHODS));
    }
}

这样，您的测试将更清楚：

import org.junit.jupiter.api.AfterEach;
import org.junit.jupiter.api.Assertions;
import org.junit.jupiter.api.BeforeEach;
import org.junit.jupiter.api.Test;
import org.mockito.MockedStatic;

import static com.test.MockitoUtils.spyStatic;

public class SpyStaticTest {
    MockedStatic<Utils> utilsSpy;

    @BeforeEach
    public void setUp() {
        utilsSpy = spyStatic(Utils.class);
    }

    @Test
    public void spy_static_test1() {
        utilsSpy.when(Utils::method2).thenReturn("static mock");

        Assertions.assertEquals(Utils.method1(), "Original mehtod1() value");
        Assertions.assertEquals(Utils.method2(), "static mock");
        Assertions.assertEquals(Utils.method3(), "static mock");

    }

    @Test
    public void spy_static_test2() {
        utilsSpy.when(Utils::method1).thenReturn("static mock");

        Assertions.assertEquals(Utils.method1(), "static mock");
        Assertions.assertEquals(Utils.method2(), "Original mehtod2() value");
        Assertions.assertEquals(Utils.method3(), "Original mehtod2() value");

    }

    @AfterEach
    public void  afterTest() {
        utilsSpy.close();
    }
}