This is a sample native Android app that contains many of the stock Android components and elements, along with example Appium, Calabash, and Espresso tests. You can use the app and example tests as a reference for your own AWS Device Farm test scripts.

This project uses Butterknife in order to create Android views and view listeners through annotations.

In order to run this app on Device Farm, you will first need to create a local copy of this repository, open the project, and then build the APK from the source.

• Android Devices come in many different screen sizes. Make sure to properly layout your views within your Android XML file. Follow this guide in order to learn more about writing code to support different screen sizes. Here is an example in the Android code where there are different defined values depending on the screen-size. This automatically resizes elements within the layouts so that views adapt to all screens sizes. Remember if an element/view isn't completely on the screen during testing it cannot be verified.

You must set a custom Instrumentation run configuration to run your Espresso tests locally. You need to set the instrumentation runner to "android.support.test.runner.AndroidJUnitRunner"

You will need two APKs: the app apk and the Espresso (Instrumentation) test apk.

Open your terminal/command prompt and change your directory to your project folder.

Linux and OSX

Enter the following command inside the terminal prompt to build the project and test apks:

./gradlew cC

Windows

Enter the following command inside the command prompt to build the project and test apks:

gradlew.bat cC

The app APK is called app-debug.apk and the test apk is app-debug-androidTest-unaligned.apk.

Follow the Device Farm Directions for Instrumentation in order to upload the APKs into the console and perform a test.

Use Idling Resources in order to wait for elements within Espresso.

Examples of custom Idling Resources used within the Espresso tests:

• VideoPlayerIdlingResource
• ViewPagerIdlingResource
• WebViewIdlingResource

Use custom matchers in order to match your views to custom elements within your tests.

Examples of custom Matchers used within the Espresso tests:

• RegularExpressionMatcher

• If you see threading errors make sure to run the test code in the UI thread. Use the UiThreadTest annotation. Due to security concerns tests that run on threads outside of the UI thread cannot communicate with the UI.
• Your app's package name must match your app's applicationId that is defined in your gradle file. If the two names do not match tests will not run.