Android Espresso 如何使用 apk 编写测试？

Question

我现在是 robotium 用户 切换到 Espresso 谁能告诉我如何在 espresso 中使用 apk 编写测试，就像我们在 robotsium 中所做的那样，无需访问代码但使用应用 apk。

以及如何在 espresso 中访问没有 R.id.viewid 的视图？就像我们在机器人中所做的那样

solo.getview("viewidText")

在robotium中我们就是这样做的

public class CoreTest extends ActivityInstrumentationTestCase2 {
private Solo solo;

//class name of the app launcher activity
private static final String LAUNCHER_ACTIVITY_FULL_CLASSNAME = "com.rex.binderapps.RecorderActivity";


private static Class<?> launcherActivityClass;

static {
    try {
        launcherActivityClass = Class.forName(LAUNCHER_ACTIVITY_FULL_CLASSNAME);
    } catch (ClassNotFoundException e) {
        throw new RuntimeException(e);
    }
}

@SuppressWarnings("unchecked")
public CoreRecordingTest() throws ClassNotFoundException {
    super(launcherActivityClass);
}

public void setUp() throws Exception {
    super.setUp();
    solo = new Solo(getInstrumentation());
    Test.setup(this);
    getActivity();
}

@Override
public void tearDown() throws Exception {
    solo.finishOpenedActivities();
    super.tearDown();
}
...

浓缩咖啡

 @RunWith(AndroidJUnit4.class)
public class MainActivityTest {

// RecorderActivity is not accessible
@Rule public final ActivityRule<RecorderActivity> main = new ActivityRule<>(RecorderActivity.class);

@Test
public void launchMain(){

  }
}

如何指定类名？

Answer 1

您可以使用相同的反射技术来指定ActivityTestRule中的类：

@RunWith(AndroidJUnit4.class)
public class MainActivityTest {

  private static final String CLASSNAME = "com.rex.binderapps.RecorderActivity";

  private static Class<? extends Activity> activityClass;
  static {
    try {
      activityClass = (Class<? extends Activity>) Class.forName(CLASSNAME);
    } catch (ClassNotFoundException e) {
      throw new RuntimeException(e);
    }
  }

  @Rule 
  public final ActivityTestRule<?> activityRule 
      = new ActivityTestRule<>(activityClass);

  @Test
  public void launchMain() {

  }
}