AWS設備農場咖啡和JUnit4

我想測試我的AWS服務器場中的應用程序，使用AWS設備農場咖啡和JUnit4

androidTestCompile 'com.android.support.test:runner:0.4' 
androidTestCompile 'com.android.support.test:rules:0.4' 
androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2.1' 
androidTestCompile 'com.android.support.test.espresso:espresso-intents:2.2.1' 
androidTestCompile('com.android.support.test.espresso:espresso-contrib:2.2.1') { 
    exclude group: 'com.android.support', module: 'appcompat' 
    exclude group: 'com.android.support', module: 'support-v4' 
    exclude module: 'recyclerview-v7' 
} 
androidTestCompile 'junit:junit:4.12' 
androidTestCompile 'com.squareup.retrofit:retrofit-mock:1.9.0' 
androidTestCompile 'com.squareup.assertj:assertj-android:1.1.0' 
androidTestCompile 'com.squareup.spoon:spoon-client:1.2.0'

樣品測試：

@RunWith(AndroidJUnit4.class) and run with AndroidJUnitRunner, I have my tests starting like: 

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

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

@Before 
public void setup() { 
} 

@Test 
public void showsRightDataOnCreate() { 
org.junit.Assert.assertEquals("asd", "asd"); 
} 
}

，但它只是試驗拆卸和安裝套件的測試...看起來它不認識測試...

另一件事是，我正在創建apk和測試apk與gradlew。