package jp.juggler.subwaytooter; import android.content.Context; import androidx.test.InstrumentationRegistry; import androidx.test.runner.AndroidJUnit4; import org.junit.Test; import org.junit.runner.RunWith; import static org.junit.Assert.*; // Android instrumentation test は run configuration を編集しないと Empty tests とかいうエラーになります @RunWith(AndroidJUnit4.class) public class ExampleInstrumentedTest { @Test public void useAppContext(){ // Context of the app under test. Context appContext = InstrumentationRegistry.getTargetContext(); assertEquals( "jp.juggler.subwaytooter", appContext.getPackageName() ); } }