Question

我需要告诉Espresso等待我的活动闲置。我正在使用接口IdlingResource来实现这一目标。这是我用于测试的代码：

    public class MyActivity extends Activity implements IdlingResource {

        private boolean isIdle;
        ResourceCallback resourceCallback;

        @Override
        protected void onCreate(Bundle savedInstanceState) {
            super.onCreate(savedInstanceState);
            setContentView(R.layout.activity_my);

            final Button myButton = (Button) findViewById(R.id.myButton);
            final ProgressBar progressBar = (ProgressBar) findViewById(R.id.progressBar);

            new Handler().postDelayed(new Runnable() {
                @Override
                public void run() {
                    myButton.setVisibility(View.VISIBLE);
                    progressBar.setVisibility(View.GONE);
                    isIdle = true;
                }
            }, 3000);
        }

        public void ButtonClicked(View view) {
            Toast.makeText(MyActivity.this, "OK", Toast.LENGTH_SHORT).show();
        }

        @Override
        public String getName() {
            return getClass().getName();
        }

        @Override
        public boolean isIdleNow() {

            if(isIdle){
                resourceCallback.onTransitionToIdle();
                return true;
            }

            return false;
        }

        @Override
        public void registerIdleTransitionCallback(ResourceCallback resourceCallback) {
            this.resourceCallback = resourceCallback;
        }
    }

Espresso会自动等待AsyncTask完成，所以如果我使用AnsycTask，我甚至不需要实现这个界面。问题是我正在使用库与网络通信，似乎没有使用AnsyncTasks或Espresso不知道。

我的问题是，如果我在模拟器（Genymotion）或任何其他设备上运行相同的测试，上面的代码只能在我的设备（摩托罗拉XT1058或Moto X）上工作正常以下例外情况：

junit.framework.AssertionFailedError: Exception in constructor: testA (java.lang.NoClassDefFoundError: rapnaveia.com.br.myapplication.MyActivity at rapnaveia.com.br.myapplication.ApplicationTest.<init>(ApplicationTest.java:16) at java.lang.reflect.Constructor.constructNative(Native Method) at java.lang.reflect.Constructor.newInstance(Constructor.java:417) at junit.runner.BaseTestRunner.getTest(BaseTestRunner.java:118) at android.test.AndroidTestRunner.getTest(AndroidTestRunner.java:149) at android.test.AndroidTestRunner.setTestClassName(AndroidTestRunner.java:57) at android.test.suitebuilder.TestSuiteBuilder.addTestClassByName(TestSuiteBuilder.java:80) at android.test.InstrumentationTestRunner.parseTestClass(InstrumentationTestRunner.java:443) at android.test.InstrumentationTestRunner.parseTestClasses(InstrumentationTestRunner.java:424) at android.test.InstrumentationTestRunner.onCreate(InstrumentationTestRunner.java:370) at com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner.onCreate(GoogleInstrumentationTestRunner.java:114) at android.app.ActivityThread.handleBindApplication(ActivityThread.java:4435) at android.app.ActivityThread.access$1300(ActivityThread.java:141) at android.app.ActivityThread$H.handleMessage(ActivityThread.java:1316) at android.os.Handler.dispatchMessage(Handler.java:99) at android.os.Looper.loop(Looper.java:137) at android.app.ActivityThread.main(ActivityThread.java:5103) at java.lang.reflect.Method.invokeNative(Native Method) at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:737) at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:553) at dalvik.system.NativeStart.main(Native Method) ) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:191) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:176) at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:554) at com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner.onStart(GoogleInstrumentationTestRunner.java:167) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1701)

这是我的测试类的代码：

public class ApplicationTest extends ActivityInstrumentationTestCase2<MyActivity> { public ApplicationTest() { super(MyActivity.class); } public void testA(){ Espresso.registerIdlingResources(getActivity()); Espresso.onView(withId(R.id.myButton)).perform(click()); } }

的build.gradle

apply plugin: 'com.android.application' android { compileSdkVersion 20 buildToolsVersion "20.0.0" defaultConfig { applicationId "rapnaveia.com.br.myapplication" minSdkVersion 15 targetSdkVersion 20 versionCode 1 versionName "1.0" testApplicationId 'br.com.rapnaveia' testInstrumentationRunner 'com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner' } buildTypes { release { runProguard false proguardFiles getDefaultProguardFile('proguard-android.txt'), 'proguard-rules.pro' } } } dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) androidTestCompile files('libs/espresso-1.1-bundled.jar') }

Answer 1

问题在于gradle配置。您的项目正在尝试两次编制浓缩咖啡罐。

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    androidTestCompile files('libs/espresso-1.1-bundled.jar')
}

使用此配置，espresso jar由主项目和测试项目编译。因此，当您尝试执行测试时，主项目无法正确构建，从而导致错误（我觉得很奇怪您可以在设备中运行测试）。

要运行测试，您所要做的就是从测试目标的依赖项中删除编译指令。

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
}

android测试项目将使用主项目中编译的espresso jar，因为主项目已“编译”到测试项目中。

实现IdlingResource的NoClassDefFoundError

1 个答案: