我怎样才能让 Mockito 在 androidTest 中工作

Question

在我的测试中，如何模拟我写的 class？

这是我的测试代码：

import android.support.test.runner.AndroidJUnit4;

import org.junit.Before;
import org.junit.Test;
import org.junit.runner.RunWith;
import org.mockito.Mock;
import org.mockito.MockitoAnnotations;

import static org.mockito.Mockito.never;
import static org.mockito.Mockito.verify;

@RunWith(AndroidJUnit4.class)
public class SampleTest {
    @Mock
    Sample mySample;

    @Before
    public void setup() {
        MockitoAnnotations.initMocks(this);
    }

    @Test
    public void shouldMockSample() {
        verify(mySample, never()).neverCallMe();
    }

}

样本只是一个假人 class。

public class Sample {

    public void neverCallMe() {}
}

如何摆脱这个错误？

java.lang.VerifyError: org/mockito/cglib/core/ReflectUtils at org.mockito.cglib.core.KeyFactory$Generator.generateClass(KeyFactory.java:167) at org.mockito.cglib.core.DefaultGeneratorStrategy.generate(DefaultGeneratorStrategy.java:25) at org.mockito.cglib.core.AbstractClassGenerator.create(AbstractClassGenerator.java:217) at org.mockito.cglib.core.KeyFactory$Generator.create(KeyFactory.java:145) at org.mockito.cglib.core.KeyFactory.create(KeyFactory.java:117) at org.mockito.cglib.core.KeyFactory.create(KeyFactory.java:109) at org.mockito.cglib.core.KeyFactory.create(KeyFactory.java:105) at org.mockito.cglib.proxy.Enhancer.(Enhancer.java:70) at org.mockito.internal.creation.cglib.ClassImposterizer.createProxyClass(ClassImposterizer.java:95) at org.mockito.internal.creation.cglib.ClassImposterizer.imposterise(ClassImposterizer.java:57) at org.mockito.internal.creation.cglib.ClassImposterizer.imposterise(ClassImposterizer.java:49) at org.mockito.internal.creation.cglib.CglibMockMaker.createMock(CglibMockMaker.java:24) at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:33) at org.mockito.internal.MockitoCore.mock(MockitoCore.java:59) at org.mockito.Mockito.spy(Mockito.java:1368)

at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at org.junit.runners.model.FrameworkMethod.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.RunBefores.evaluate(RunBefores.java:24) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) 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.run(ParentRunner.java:290) at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access[=13=]0(ParentRunner.java:58) at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:290) at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access[=13=]0(ParentRunner.java:58) at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at org.junit.runner.JUnitCore.run(JUnitCore.java:115) at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:54) at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:228) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1741)

java.lang.NoClassDefFoundError: org/mockito/internal/creation/cglib/ClassImposterizer at org.mockito.internal.creation.cglib.ClassImposterizer.createProxyClass(ClassImposterizer.java:95) at org.mockito.internal.creation.cglib.ClassImposterizer.imposterise(ClassImposterizer.java:57) at org.mockito.internal.creation.cglib.ClassImposterizer.imposterise(ClassImposterizer.java:49) at org.mockito.internal.creation.cglib.CglibMockMaker.createMock(CglibMockMaker.java:24) at org.mockito.internal.util.MockUtil.createMock(MockUtil.java:33) at org.mockito.internal.MockitoCore.mock(MockitoCore.java:59) at org.mockito.Mockito.spy(Mockito.java:1368)

at java.lang.reflect.Method.invokeNative(Native Method) at java.lang.reflect.Method.invoke(Method.java:515) at org.junit.runners.model.FrameworkMethod.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.RunBefores.evaluate(RunBefores.java:24) at org.junit.internal.runners.statements.RunAfters.evaluate(RunAfters.java:27) 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.run(ParentRunner.java:290) at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access[=13=]0(ParentRunner.java:58) at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runners.Suite.runChild(Suite.java:128) at org.junit.runners.Suite.runChild(Suite.java:27) at org.junit.runners.ParentRunner.run(ParentRunner.java:290) at org.junit.runners.ParentRunner.schedule(ParentRunner.java:71) at org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288) at org.junit.runners.ParentRunner.access[=13=]0(ParentRunner.java:58) at org.junit.runners.ParentRunner.evaluate(ParentRunner.java:268) at org.junit.runners.ParentRunner.run(ParentRunner.java:363) at org.junit.runner.JUnitCore.run(JUnitCore.java:137) at org.junit.runner.JUnitCore.run(JUnitCore.java:115) at android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:54) at android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:228) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1741)

我在 gradle 文件中使用了以下依赖项：

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    compile 'com.android.support:appcompat-v7:22.2.1'
    androidTestCompile 'com.android.support:support-annotations:22.2.1'
    androidTestCompile 'org.mockito:mockito-core:1.10.19'
    androidTestCompile 'org.objenesis:objenesis:2.1'
    androidTestCompile 'org.hamcrest:hamcrest-library:1.3'
    androidTestCompile 'com.android.support.test:runner:0.3'
    androidTestCompile 'com.android.support.test:rules:0.3'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2'
    testCompile 'org.mockito:mockito-core:1.10.19'
    testCompile 'org.hamcrest:hamcrest-library:1.3'
    testCompile 'junit:junit:4.12'
    testCompile 'org.robolectric:robolectric:3.0'
}

Answer 1

默认情况下，Mockito 使用 CGLib 或 ByteBuddy，它们都会生成 .class 个文件。您运行在 Android 设备或模拟器上，因此 .class 文件无济于事；您需要 .dex 格式。

调整您的依赖项以使用 DexMaker，这将覆盖 Mockito 的默认设置并允许在 Android 环境中进行模拟。

Answer 2

自版本 2.6.+ 起，Mockito 添加了一个适用于 Android 的新工件，无需任何其他依赖项（即不再需要导入 DexMaker）。 (Reference)

只需使用 org.mockito:mockito-android 作为检测单元测试 (androidTest) 的依赖项。您仍然会使用通常的 org.mockito:mockito-core 进行本地单元测试。

示例：

dependencies {
    ...
    testImplemenation 'org.mockito:mockito-core:2.7.15'
    androidTestImplementation 'org.mockito:mockito-android:2.7.15'
    ...
}

Answer 3

添加这些依赖项

androidTestImplementation("androidx.test.ext:junit:1.1.3")
androidTestImplementation("com.linkedin.dexmaker:dexmaker-mockito-inline:2.28.1")

testImplementation("junit:junit:4.13.2")
testImplementation("androidx.test:core:1.4.0")
testImplementation("org.mockito:mockito-android:4.2.0")
testImplementation("org.mockito:mockito-inline:4.2.0")
testImplementation("org.mockito:mockito-core:4.2.0")

你可以像这样使用 mockito：

@RunWith(AndroidJUnit4::class)
class MainActivityTest {

    @get:Rule
    val composeTestRule = createComposeRule()

    private lateinit var viewModel: HomeScreenViewModel

    @Mock
    private val sampleUseCase = mock(SampleUseCase::class.java)

    @Before
    fun setup() {
        runBlockingTest {
            `when`(sampleUseCase.invoke(anyInt(), anyString())).thenReturn(
                NetworkDataState.Success(listOf(
                    SampleObject(id = 1),
                    SampleObject(id = 2),
                    SampleObject(id = 3),
                ))
            )

            viewModel = HomeScreenViewModel(
                sampleUseCase
            )
        }
    }

    @Test
    fun navigationTest() {
        composeTestRule.setContent {
            AppTheme {
                MainScreen(
                    navController = rememberNavController(),
                    viewModel = viewModel
                )
            }
        }

        composeTestRule
            .onNodeWithContentDescription("chips")
            .performScrollToIndex(4)
    }
}

我怎样才能让 Mockito 在 androidTest 中工作

How can I get Mockito working in androidTest

android

unit-testing

mockito