我们正在开发一个提供Activity的库，我希望能够对Activity进行一些功能测试。
我的build.gradle包括：
dependencies {
compile fileTree(dir: 'libs', include: ['*.jar'])
compile 'com.android.support:appcompat-v7:22.1.1'
testCompile 'org.mockito:mockito-core:1.+'
testCompile 'junit:junit:4.12'
testCompile('org.robolectric:robolectric:3.0-rc2') {
exclude group: 'commons-logging', module: 'commons-logging'
exclude group: 'org.apache.httpcomponents', module: 'httpclient'
}
testCompile('org.robolectric:shadows-httpclient:3.0-rc2') {
exclude group: 'commons-logging', module: 'commons-logging'
exclude group: 'org.apache.httpcomponents', module: 'httpclient'
}
testCompile('org.robolectric:shadows-support-v4:3.0-rc2') {
exclude group: 'commons-logging', module: 'commons-logging'
exclude group: 'org.apache.httpcomponents', module: 'httpclient'
}
}
我的LibraryActivityTest包括：
@RunWith(RobolectricGradleTestRunner.class)
public class LibraryActivityTest {
@Test
public void testOnCreate() throws Exception {
LibraryActivity libraryActivity = Robolectric.buildActivity(LibraryActivity.class).create().get();
}
}
MyRobolectricGradleTestRunner会覆盖getAppManifest以恢复指定特定于测试的AndroidManifest.xml而非使用应用程序版本的功能。
当我尝试从Android Studio或gradle命令行运行testOnCreate时，我收到android/support/v7/appcompat/R$styleable的类def def not found错误：
android/support/v7/appcompat/R$styleable
java.lang.NoClassDefFoundError: android/support/v7/appcompat/R$styleable
at android.support.v7.app.AppCompatDelegateImplBase.onCreate(AppCompatDelegateImplBase.java:109)
at android.support.v7.app.AppCompatDelegateImplV7.onCreate(AppCompatDelegateImplV7.java:146)
at android.support.v7.app.AppCompatActivity.onCreate(AppCompatActivity.java:59)
at com.moxiesoft.mylibrary.LibraryActivity.onCreate(LibraryActivity.java:13)
at android.app.Activity.performCreate(Activity.java:5133)
at org.robolectric.util.ReflectionHelpers$3.run(ReflectionHelpers.java:144)
at org.robolectric.util.ReflectionHelpers.traverseClassHierarchy(ReflectionHelpers.java:241)
at org.robolectric.util.ReflectionHelpers.callInstanceMethod(ReflectionHelpers.java:138)
at org.robolectric.util.ActivityController$1.run(ActivityController.java:122)
at org.robolectric.shadows.ShadowLooper.runPaused(ShadowLooper.java:309)
at org.robolectric.shadows.CoreShadowsAdapter$2.runPaused(CoreShadowsAdapter.java:47)
at org.robolectric.util.ActivityController.create(ActivityController.java:118)
at org.robolectric.util.ActivityController.create(ActivityController.java:129)
at com.moxiesoft.mylibrary.LibraryActivityTest.testOnCreate(LibraryActivityTest.java:20)
at org.junit.runners.model.FrameworkMethod$1.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.InvokeMethod.evaluate(InvokeMethod.java:17)
at org.robolectric.RobolectricTestRunner$2.evaluate(RobolectricTestRunner.java:235)
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.robolectric.RobolectricTestRunner$1.evaluate(RobolectricTestRunner.java:168)
at org.junit.runners.ParentRunner.run(ParentRunner.java:363)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.runTestClass(JUnitTestClassExecuter.java:86)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassExecuter.execute(JUnitTestClassExecuter.java:49)
at org.gradle.api.internal.tasks.testing.junit.JUnitTestClassProcessor.processTestClass(JUnitTestClassProcessor.java:69)
at org.gradle.api.internal.tasks.testing.SuiteTestClassProcessor.processTestClass(SuiteTestClassProcessor.java:48)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.messaging.dispatch.ContextClassLoaderDispatch.dispatch(ContextClassLoaderDispatch.java:32)
at org.gradle.messaging.dispatch.ProxyDispatchAdapter$DispatchingInvocationHandler.invoke(ProxyDispatchAdapter.java:93)
at com.sun.proxy.$Proxy2.processTestClass(Unknown Source)
at org.gradle.api.internal.tasks.testing.worker.TestWorker.processTestClass(TestWorker.java:105)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:35)
at org.gradle.messaging.dispatch.ReflectionDispatch.dispatch(ReflectionDispatch.java:24)
at org.gradle.messaging.remote.internal.hub.MessageHub$Handler.run(MessageHub.java:360)
at org.gradle.internal.concurrent.DefaultExecutorFactory$StoppableExecutorImpl$1.run(DefaultExecutorFactory.java:64)
at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1142)
at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:617)
at java.lang.Thread.run(Thread.java:745)
值得注意的是，安装和配置似乎是合理的，因为不涉及ActivityController.create的测试似乎工作正常。
如何解决此错误？
答案 0 :(得分：1)
因此，问题的根源似乎是gradle如何（或不）处理为android/support/v7/appcompat/R.java模块创建com.android.library。
通过here提供的线索，我可以通过将这个块放在我的build.gradle
def package_namespace = "com.moxiesoft.netagent.androidchatcustomerclient"
def package_namespace_path = package_namespace.replaceAll("\\.", "/")
afterEvaluate { project ->
android.libraryVariants.each { variant ->
// workaround for missing R class for aar dependencies
def copyTaskName = "copy${variant.name.capitalize()}AppCompat"
task(copyTaskName, type:Copy) {
dependsOn "process${variant.name.capitalize()}Resources"
from "build/generated/source/r/${variant.name}/$package_namespace_path"
// into "build/generated/source/r/${variant.name}/android/support/v7/appcompat"
into "src/test/java/android/support/v7/appcompat"
include 'R.java'
filter { line -> line.contains("package ${package_namespace};") ? 'package android.support.v7.appcompat;' : line }
outputs.upToDateWhen { false }
}
tasks.getByName("compile${variant.name.capitalize()}UnitTestJava") dependsOn copyTaskName
}
}
基本上它只是将生成的应用程序R.java文件复制到tests build文件夹中，以便在测试编译阶段获取它。我尝试将副本放入生成的sources文件夹中，但是测试编译阶段似乎并没有把它复制到那里。