Android Espresso 无法正常工作

Question

我花了一个多星期的时间来寻找一个带有 Espresso 的 android 测试。我无法让空闲资源在我的项目中正常工作(集成到项目中)。这是我添加到 build.gradle 中的内容:

dependencies {
    // Testing-only dependencies
    androidTestCompile 'com.android.support.test:testing-support-lib:0.1'
    androidTestCompile 'com.android.support.test.espresso:espresso-core:2.0'
}

testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"

测试类是什么:

    SetUp:
countingResource = new CountingIdlingResource("HelloWorldServerCalls");
Espresso.registerIdlingResources(countingResource);    

在测试方法中:

Espresso.onView(ViewMatchers.withId(R.id.btnLogIn)).check(ViewAssertions.matches(ViewMatchers.isDisplayed()));
        Log.d(TAG, "We are in WalkthroughActivity, user is not logged in");

//press button  - walk to next activity
Espresso.onView(ViewMatchers.withId(R.id.btnLogIn)).perform(ViewActions.click());

//register MyUserHelperV2 - this is Server decorator
 final LoginActivity act = (LoginActivity) getCurrentActivity();
        LoginActivity.Server aHelper = act.getUserHelper();
        MyUserHelperV2 helper = new MyUserHelperV2(aHelper, countingResource);
        act.setUserHelper(helper);

    //set password and email
  Espresso.onView(ViewMatchers.withId(R.id.email)).perform(ViewActions.typeText("test@mail.ru"));
    Espresso.onView(ViewMatchers.withId(R.id.password)).perform(ViewActions.typeText("password111"));
         //Check if button R.id.btnLogInApp exists: 
Espresso.onView(ViewMatchers.withId(R.id.btnLogInApp)).check(ViewAssertions.matches(ViewMatchers.isDisplayed()));

Espresso.closeSoftKeyboard();
    Espresso.onView(ViewMatchers.withId(R.id.btnLogInApp)).perform(ViewActions.click());
    //in last line we have PerformException - can not find R.id.btnLogInApp, 

但是这个按钮肯定存在——我可以模拟 not-idle(sync) 调用并且一切正常。我在想我可能会在设置中犯错误 - 在 android 5 上一切正常，在其他 android 上 <5 - 没有。

我已经研究了很多示例，并且可以肯定地完美地实现了空闲资源。但是我对gradle系统太糟糕了。请帮忙，我对 espresso 和 gradle 很绝望，如果需要，我可以附上更多规范代码。

Answer 1

这是一个build.gradle示例文件

apply plugin: 'com.android.application'

android {
  compileSdkVersion 22
  buildToolsVersion "22"

defaultConfig {
    applicationId "com.my.awesome.app"
    minSdkVersion 10
    targetSdkVersion 22.0.1
    versionCode 1
    versionName "1.0"

    testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  }
}

dependencies {
// App's dependencies, including test
compile 'com.android.support:support-annotations:22.2.0'

// Testing-only dependencies
androidTestCompile 'com.android.support.test:runner:0.5'
androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.2'
}

还有一个测试类的例子

Android Studio默认在src/androidTest/java/com.example.package/中创建测试

@RunWith(AndroidJUnit4.class)
@LargeTest
 public class HelloWorldEspressoTest {

@Rule
 public ActivityTestRule<MainActivity> mActivityRule = new ActivityTestRule(MainActivity.class);

@Test
 public void listGoesOverTheFold() {
    onView(withText("Hello world!")).check(matches(isDisplayed()));
 }
}