android - 使用 robolectric 进行单元测试会出现 NoSuchMethodException 错误

Question

经过一段时间的研究，我仍然没有找到为什么我的 Android 代码中会发生这种情况。这只是标准的简单单元测试代码，实际上并没有发生太多事情。我之前在我的工作机器上尝试过这段代码并成功运行了单元测试。我不知道为什么我家里的另一台电脑会发生这种情况。也许这可能是由于 robolectric 3 的某些不正确设置造成的，我不太确定。我附上了完整的日志报告，也许你们能够更好地理解它。谢谢。

运行单元测试的 Gradle 命令:

gradlew test

错误:

com.sample.bigger.MainActivityTest > sampleTest FAILED
java.lang.RuntimeException                              
    Caused by: java.lang.RuntimeException               
        Caused by: java.lang.NoSuchMethodException      

完整日志:

java.lang.RuntimeException: java.lang.NoSuchMethodException: android.os.Looper.<init>(boolean)
    at org.robolectric.util.ReflectionHelpers.callConstructor(ReflectionHelpers.java:297)
    at org.robolectric.shadows.ShadowLooper.createLooper(ShadowLooper.java:43)
    at org.robolectric.shadows.ShadowLooper.access$000(ShadowLooper.java:25)
    at org.robolectric.shadows.ShadowLooper$1.create(ShadowLooper.java:37)
    at org.robolectric.shadows.ShadowLooper$1.create(ShadowLooper.java:35)
    at org.robolectric.util.SoftThreadLocal$1.initialValue(SoftThreadLocal.java:13)
    at org.robolectric.util.SoftThreadLocal$1.initialValue(SoftThreadLocal.java:11)
    at java.lang.ThreadLocal.setInitialValue(ThreadLocal.java:160)
    at java.lang.ThreadLocal.get(ThreadLocal.java:150)
    at org.robolectric.util.SoftThreadLocal.get(SoftThreadLocal.java:18)
    at org.robolectric.shadows.ShadowLooper.resetThreadLoopers(ShadowLooper.java:55)
    at org.robolectric.Shadows.reset(Shadows.java:1612)
    at org.robolectric.Robolectric.reset(Robolectric.java:22)
    at org.robolectric.internal.ParallelUniverse.resetStaticState(ParallelUniverse.java:43)
    at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:233)
    at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:188)
    at org.robolectric.RobolectricTestRunner.runChild(RobolectricTestRunner.java:54)
    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.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:152)
    at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:86)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:49)
    at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:69)
    at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:48)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.messaging.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
    at org.gradle.messaging.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
    at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
    at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:105)
    at sun.reflect.NativeMethodAccessorImpl.invoke0(Native Method)
    at sun.reflect.NativeMethodAccessorImpl.invoke(NativeMethodAccessorImpl.java:57)
    at sun.reflect.DelegatingMethodAccessorImpl.invoke(DelegatingMethodAccessorImpl.java:43)
    at java.lang.reflect.Method.invoke(Method.java:606)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
    at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
    at org.gradle.messaging.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:360)
    at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:64)
    at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1145)
    at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:615)
    at java.lang.Thread.run(Thread.java:745)
Caused by: java.lang.NoSuchMethodException: android.os.Looper.<init>(boolean)
    at java.lang.Class.getConstructor0(Class.java:2892)
    at java.lang.Class.getDeclaredConstructor(Class.java:2058)
    at org.robolectric.util.ReflectionHelpers.callConstructor(ReflectionHelpers.java:283)
    ... 48 more

这是我的主要ActivityTest

@RunWith(RobolectricGradleTestRunner.class)
@Config(constants = BuildConfig.class, sdk = 18)
public class MainActivityTest {

@Test
    public void sampleTest(){
        Assert.assertEquals("hey", "hey");
    }
}

这是我的 build.gradle 文件

apply plugin: 'com.android.application'
android {
    compileSdkVersion 22
    buildToolsVersion "22.0.1"

    defaultConfig {
        applicationId "com.sample.bigger"
        minSdkVersion 15
        targetSdkVersion 22
        versionCode 1
        versionName "1.0"
    }
}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    // Added for AdMob
    compile project(':jokeproviderlib')
    compile project(':jokedisplayer')
    compile 'com.android.support:appcompat-v7:22.2.0'
    compile 'com.google.android.gms:play-services:7.3.0'
    compile project(path: ':jokeGCMbackend', configuration: 'android-endpoints')
    compile 'com.google.mockwebserver:mockwebserver:20130706'


    testCompile 'junit:junit:4.12'
    testCompile "org.mockito:mockito-core:1.9.5"
    testCompile('org.robolectric:robolectric:3.0') {
        exclude group: 'commons-logging', module: 'commons-logging'
        exclude group: 'org.apache.httpcomponents', module: 'httpclient'
    }
}

我看过以下来源，第一个似乎是最接近的。我还在尝试如何做到这一点。

• https://groups.google.com/forum/#!topic/robolectric/le1oJKpIW9Q
• Robolectric 3.0 java.lang.NoSuchMethodException on create activity
• Robolectric 2.4 NoSuchMethodError cannot be cast to RuntimeException when creating activity
• 创建时没有这样的方法错误，无法转换为运行时异常
• https://github.com/robolectric/robolectric/issues/1633

Answer 1

就我而言，我编写了一个测试 Activity ，它扩展了测试类中的正常 Activity 。并遇到了这个错误。我将测试 Activity 从测试类移到一个单独的文件中，然后效果很好。