테스트

gradle

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

}

dependencies {
    compile fileTree(dir: 'libs', include: ['*.jar'])
    testCompile 'junit:junit:4.12'
    androidTestCompile 'junit:junit:4.12'
    androidTestCompile 'com.android.support.test:runner:0.5'
    androidTestCompile 'com.android.support.test:rules:0.5'
    androidTestCompile 'com.android.support:support-annotations:24.2.1'
}

Java

Activity 클래스 이름이 MainActivity 일 때

@RunWith(AndroidJUnit4.class)
@SmallTest
public class MainActivityTest {
  @Rule
  public ActivityTestRule<MainActivity> mActivityRule = new ActivityTestRule(MainActivity.class);

  @Test
  public void yourTest() {
   // test code here
  }
}