测试 getter 方法失败

Question

我想测试的类发布在下面的代码部分。我正在尝试测试“getSubscriberName”方法。 我编码的测试发布在下面的测试部分。但在运行时测试失败，我收到下面发布的错误

我在 build.gradle 中使用的依赖项发布在下面

请告诉我如何纠正错误以及为什么会出现此错误

代码

public class ListViewModel {

private String mSubscriberName = null;

public ListViewModel(String subscriberName) {
    mSubscriberName = subscriberName;
}

public String getSubscriberName() {
    return mSubscriberName;
}

public void setSubscriberName(String name) {
    mSubscriberName = name;
}

}

}

测试：

public class ListViewModelTest {

@Mock
private ListViewModel mListViewModel = null;
@Rule
public MockitoRule mockitoRule = MockitoJUnit.rule();

@Before
public void setUp() throws Exception {
    mListViewModel = new ListViewModel("");
}

@Test
public void getSubscriberName() {
    ListViewModel spyListViewModel = spy(mListViewModel);
    when(spyListViewModel.getSubscriberName()).thenReturn("YXZ");

    String expectedSubscriberName = spyListViewModel.getSubscriberName();
    Assert.assertEquals(expectedSubscriberName, spyListViewModel.getSubscriberName());
}

}

错误：

java.lang.AbstractMethodError: org.powermock.api.mockito.internal.mockmaker.PowerMockMaker.isTypeMockable(Ljava/lang/Class;)Lorg/mockito/plugins/MockMaker$TypeMockability;

at org.mockito.internal.util.MockUtil.typeMockabilityOf(MockUtil.java:29)
at org.mockito.internal.util.MockCreationValidator.validateType(MockCreationValidator.java:22)
at org.mockito.internal.creation.MockSettingsImpl.validatedSettings(MockSettingsImpl.java:186)
at org.mockito.internal.creation.MockSettingsImpl.confirm(MockSettingsImpl.java:180)
at org.mockito.internal.MockitoCore.mock(MockitoCore.java:62)
at org.mockito.Mockito.mock(Mockito.java:1729)
at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:33)
at org.mockito.internal.configuration.MockAnnotationProcessor.process(MockAnnotationProcessor.java:16)
at org.mockito.internal.configuration.IndependentAnnotationEngine.createMockFor(IndependentAnnotationEngine.java:38)
at org.mockito.internal.configuration.IndependentAnnotationEngine.process(IndependentAnnotationEngine.java:62)
at org.mockito.internal.configuration.InjectingAnnotationEngine.processIndependentAnnotations(InjectingAnnotationEngine.java:57)
at org.mockito.internal.configuration.InjectingAnnotationEngine.process(InjectingAnnotationEngine.java:41)
at org.mockito.MockitoAnnotations.initMocks(MockitoAnnotations.java:69)
at org.mockito.internal.junit.JUnitRule$1.evaluate(JUnitRule.java:42)
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:117)
at com.intellij.junit4.JUnit4IdeaTestRunner.startRunnerWithArgs(JUnit4IdeaTestRunner.java:42)
at com.intellij.rt.execution.junit.JUnitStarter.prepareStreamsAndStart(JUnitStarter.java:262)
at com.intellij.rt.execution.junit.JUnitStarter.main(JUnitStarter.java:84)
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.AppMain.main(AppMain.java:147)

gradle.build：

dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
androidTestCompile('com.android.support.test.espresso:espresso-core:2.2.2', {
    exclude group: 'com.android.support', module: 'support-annotations'
})
compile 'com.android.support:appcompat-v7:25.3.1'
compile 'com.android.support.constraint:constraint-layout:1.0.2'
testCompile 'junit:junit:4.12'

// required if you want to use Mockito for unit tests
testCompile 'org.mockito:mockito-core:2.7.22'
// required if you want to use Mockito for Android tests
androidTestCompile 'org.mockito:mockito-android:2.7.22'

testCompile 'org.powermock:powermock-api-mockito:1.6.1'
testCompile 'org.powermock:powermock-module-junit4-rule-agent:1.6.1'
testCompile 'org.powermock:powermock-module-junit4-rule:1.6.1'
testCompile 'org.powermock:powermock-module-junit4:1.6.1'

compile 'com.squareup.okhttp3:logging-interceptor:3.4.0'
compile 'com.squareup.retrofit2:retrofit:2.3.0'
compile 'com.squareup.retrofit2:converter-gson:2.1.0'
compile 'com.squareup:otto:1.3.8'
compile 'com.google.code.gson:gson:2.6.2'
compile 'com.android.support:recyclerview-v7:25.1.1'
compile 'com.squareup.okhttp3:okhttp:3.9.0'
compile 'com.google.code.gson:gson:2.8.1'
compile 'com.solidfire.code.gson:gson:2.6.2'
compile 'com.google.code.gson:gson-parent:2.8.1'
compile 'com.solidfire.code.gson:gson-parent:2.6.2'
compile 'com.android.support:support-annotations:25.1.1'
compile 'com.squareup.picasso:picasso:2.5.2'
}

Answer 1

尽量避免使用 spy，因为它会通过调用所有依赖的类方法来进行实际调用并使您的测试用例闻起来更臭，请在下面找到您问题的解决方案（我仍然根据您的代码使用 spy）

@RunWith(MockitoJUnitRunner.class)
public class ListViewModelTest {
@InjectMocks
private ListViewModel mListViewModel;
@Rule
public MockitoRule mockitoRule = MockitoJUnit.rule();

@Before
public void setUp() throws Exception {
   // mListViewModel = new ListViewModel("");
}

@Test
public void getSubscriberName() {
    ListViewModel spyListViewModel = spy(Mockito.mock(ListViewModel.class));
    when(spyListViewModel.getSubscriberName()).thenReturn("YXZ");
    when(mListViewModel.getSubscriberName()).thenReturn("YXZ");
    String expectedSubscriberName = spyListViewModel.getSubscriberName();
    Assert.assertEquals(expectedSubscriberName, mListViewModel.getSubscriberName());
}

}