android-espresso - Espresso 2-如何测试多项事件？

Question

我已经看到了一些关于它的问题。

例如。 Android Espresso testing app flow

但是上面的答案在espresso 2中不起作用。这是我的摘录

@Rule
public ActivityTestRule<SplashActivity> mActivityTestRule = new ActivityTestRule<>(SplashActivity.class);


@Test
public void splashActivityTest() {
    onView(withId(R.id.splash_container)).perform(swipeLeft());
    onView(withId(R.id.splash_container)).perform(swipeLeft());

    // launch the main activity
    ViewInteraction appCompatButton = onView(
            allOf(withId(R.id.introduction_goto_btn), withText("goToMainActivity"), isDisplayed()));
    appCompatButton.perform(click());

    // the hierarchy can't find HomeBtn , it still hold the Splash's View, so the code below will fail
    onView(withId(R.id.home_btn)).check(ViewAssertions.matches(isDisplayed()));
}

如果在一个TestFile中不允许进行多事件测试，那么如何进行测试多个事件的流程？

Answer 1

我也有麻烦即使我使用了空闲状态，Espresso也不会等待新的事件运行。因此，这迫使我在检查有关新事件的 View 之前设置了延迟

创建界面:

/**
* Interface for expectations of compliance with the conditions.
*/
public interface Condition {
 /**
  * @return text description for log output when check failed.
 */
 String getDescription();

 /**
  * @return true if the condition is met.
  */
 boolean check();
}

并像这样使用它:

/**
* Wait while condition come true or timeout limit.
*
* @param condition condition for exit
* @param timeout   limit in seconds
* @throws Exception exception
*/
public static void waitForCondition(Condition condition, int timeout) throws Exception {
final int CONDITION_NOT_MET = 0;
final int CONDITION_MET = 1;
final int TIMEOUT = 2;

final int INTERVAL = 250;

int status = CONDITION_NOT_MET;
int elapsedTime = 0;

do {
  if (condition.check()) {
    status = CONDITION_MET;
  } else {
    elapsedTime += INTERVAL;
    delay(INTERVAL);
  }

  if (elapsedTime >= timeout * 1000) {
    status = TIMEOUT;
    break;
  }
} while (status != CONDITION_MET);

if (status == TIMEOUT) {
  String msg = condition.getDescription() + " - took more than " + timeout + " seconds. Test stopped.";
  log(msg);
  throw new Exception(msg);
 }
}

例子:

public class MovieScreenVisible implements Condition {
  @Override
  public String getDescription() {
    return "Movie screen should be on the top";
  }

  @Override
  public boolean check() {
    Activity activity = TestBase.getCurrentActivity();
    if (activity == null || !(activity instanceof MovieActivity)) {
      return false;
    }

    ViewGroup layout = activity.findViewById(R.id.movie_fragment);
    return layout != null && layout.getVisibility() == View.VISIBLE;
  }
}

// wait maximum 30 seconds until movie screen should be visible
waitForCondition(new MovieScreenVisible(), 30);