title: Android Espresso: Test running failed. No test results Empty test suite. Why?
body: <p>Can't make my Espresso UI test work. Where's the problem? <br>
  What result should I get for this simple app to consider that it's working?</p>
  
  <p>I have <em>"android.support.test.runner.AndroidJUnitRunner"</em> for Instrumentation runner in <code>Edit Confirurations</code>.</p>
  
  <p>From AndroidManifest.xml:</p>
  
  <pre><code>    &lt;instrumentation
  android:name="android.support.test.runner.AndroidJUnitRunner"
  android:targetPackage="my.package"/&gt;
  </code></pre>
  
  <p>From build.gradle:</p>
  
  <pre><code>defaultConfig {
      applicationId "my.package"
      minSdkVersion 18
      targetSdkVersion 22
      versionCode 1
      versionName "1.0"
      testInstrumentationRunner "android.support.test.runner.AndroidJUnitRunner"
  }
  
  packagingOptions {
      exclude 'LICENSE.txt'}
  
  repositories { jcenter()}
  
  dependencies {
  compile fileTree(dir: 'libs', include: ['*.jar'])
  compile 'com.android.support:appcompat-v7:22.2.0'
  compile 'com.android.support:support-annotations:22.2.0'
  androidTestCompile 'com.android.support.test:runner:0.3'
  androidTestCompile 'com.android.support.test:rules:0.3'
  androidTestCompile 'com.android.support.test.espresso:espresso-core:2.2'
  androidTestCompile 'com.android.support.test.uiautomator:uiautomator-v18:2.1.1'
  testCompile 'junit:junit:4.12'}
  </code></pre>
  
  <p>MainActivity.java</p>
  
  <pre><code>public class MainActivity extends Activity {
  
      @Override
      protected void onCreate(Bundle savedInstanceState) {
          super.onCreate(savedInstanceState);
          setContentView(R.layout.activity_main);
  
          final EditText editText = (EditText)findViewById(R.id.edit_text);
          Button button = (Button) findViewById(R.id.confirm);
          final TextView textView = (TextView)findViewById(R.id.you_entered);
  
          button.setOnClickListener(new View.OnClickListener() {
              @Override
              public void onClick(View view) {
                  textView.setText("You entered: " + editText.getText());
              }
          });
      }
  }
  </code></pre>
  
  <p>ApplicationTest.java</p>
  
  <pre><code>    public class ApplicationTest extends ApplicationTestCase&lt;Application&gt; {
      public ApplicationTest() {
          super(Application.class);
      }
  }
  </code></pre>
  
  <p>MainActivityTest</p>
  
  <pre><code>public class MainActivityTest extends ActivityInstrumentationTestCase2 &lt;MainActivity&gt; {
  
      Activity activity;
      public MainActivityTest() {
          super(MainActivity.class);
      }
  
      @Override
      public void setUp() throws Exception {
          super.setUp();
          activity = getActivity();
      }
  
      @SmallTest
      public void testInputOutput() {
          Espresso.onView(ViewMatchers.withId(R.id.edit_text)).perform(ViewActions.click())
                  .perform(ViewActions.typeText("Espresso"));
          Espresso.onView(ViewMatchers.withId(R.id.confirm)).perform(ViewActions.click());
          Espresso.onView(ViewMatchers.withId(R.id.you_entered)).check(ViewAssertions.matches
                  (ViewMatchers.withText("Espresso")));
          assertEquals(((TextView)ViewMatchers.withId(R.id.you_entered)).getText(), "Espresso");
      }
  }
  </code></pre>
  
  <p>The results of running all tests:</p>
  
  <pre><code>Testing started at 12:36 ...
  Installing my.package
  DEVICE SHELL COMMAND: pm install -r "/data/local/tmp/my.package"
  pkg: /data/local/tmp/my.package
  Success
  
  Uploading file
      local path: /home/jane_doe/project/android/MyTestApp/app/build/outputs/apk/app-debug-androidTest-unaligned.apk
      remote path: /data/local/tmp/my.package.test
  Installing my.package.test
  DEVICE SHELL COMMAND: pm install -r "/data/local/tmp/my.package.test"
  pkg: /data/local/tmp/my.package.test
  Success
  
  Running tests
  Test running startedTest running failed: No test results
  Empty test suite.
  </code></pre>
  
  <p>The result of running MainActivityTest only:</p>
  
  <pre><code>Testing started at 12:39 ...
  12:39:39: Executing external tasks 'cleanTest test --tests cosysoft.cupofcoffee.MainActivityTest'...
  :app:cleanTest UP-TO-DATE
  :app:preBuild UP-TO-DATE
  :app:preDebugBuild UP-TO-DATE
  :app:checkDebugManifest
  :app:preReleaseBuild UP-TO-DATE
  :app:prepareComAndroidSupportAppcompatV72220Library UP-TO-DATE
  :app:prepareComAndroidSupportSupportV42220Library UP-TO-DATE
  :app:prepareDebugDependencies
  :app:compileDebugAidl UP-TO-DATE
  :app:compileDebugRenderscript UP-TO-DATE
  :app:generateDebugBuildConfig UP-TO-DATE
  :app:generateDebugAssets UP-TO-DATE
  :app:mergeDebugAssets UP-TO-DATE
  :app:generateDebugResValues UP-TO-DATE
  :app:generateDebugResources UP-TO-DATE
  :app:mergeDebugResources UP-TO-DATE
  :app:processDebugManifest UP-TO-DATE
  :app:processDebugResources UP-TO-DATE
  :app:generateDebugSources UP-TO-DATE
  :app:processDebugJavaRes UP-TO-DATE
  :app:compileDebugJava UP-TO-DATE
  :app:preCompileDebugUnitTestJava
  :app:preDebugUnitTestBuild UP-TO-DATE
  :app:prepareDebugUnitTestDependencies
  :app:processDebugUnitTestJavaRes UP-TO-DATE
  :app:compileDebugUnitTestJava UP-TO-DATE
  :app:compileDebugUnitTestSources UP-TO-DATE
  :app:mockableAndroidJar UP-TO-DATE
  :app:assembleDebugUnitTest UP-TO-DATE
  :app:testDebug
  :app:testDebug FAILED
  FAILURE: Build failed with an exception.
  * What went wrong:
  Execution failed for task ':app:testDebug'.
  &gt; No tests found for given includes: [my.package.MainActivityTest]
  * Try:
  Run with --stacktrace option to get the stack trace. Run with --info or --debug option to get more log output.
  BUILD FAILED
  Total time: 3.079 secs
  No tests found for given includes: [my.package.MainActivityTest]
  </code></pre>