我正在尝试测试AutoCompleteTextView
将在输入某个单词后显示项目。但是在键入和显示弹出窗口之间存在延迟。首先我使用Thread.sleep()
,它工作得很好。但我知道这种方法并不清楚,所以我试图用IdlingResource
来完成它。但它对我不起作用。我确实阅读了前5页的Google回复,但要么我不明白它应该如何工作,要么我的代码中有一些错误。
以下是代码:
static class AutocompleteShowIdlingResource implements IdlingResource {
private Activity activity;
private @IdRes int resId;
private ResourceCallback resourceCallback;
public AutocompleteShowIdlingResource(Activity activity, @IdRes int resId) {
this.activity = activity;
this.resId = resId;
}
@Override
public String getName() {
return this.getClass().getName() + resId;
}
@Override
public boolean isIdleNow() {
boolean idle = ((AutoCompleteTextView) activity.findViewById(resId)).getAdapter() != null;
Log.d(TAG, "isIdleNow: " + idle);
if (idle) {
resourceCallback.onTransitionToIdle();
}
return idle;
}
@Override
public void registerIdleTransitionCallback(ResourceCallback callback) {
this.resourceCallback = callback;
}
}
测试本身:
Activity activity = calibrationActivityRule.getActivity();
onView(withId(R.id.autocomplete_occupation)).perform(typeText("dok"));
IdlingResource idlingResource = new AutocompleteShowIdlingResource(activity, R.id.autocomplete_occupation);
Espresso.registerIdlingResources(idlingResource);
assertEquals(((AutoCompleteTextView) activity.findViewById(R.id.autocomplete_occupation)).getAdapter().getCount(), 3);
Espresso.unregisterIdlingResources(idlingResource);
但尝试在null适配器上调用java.lang.NullPointerException
时,getCount()
上的测试失败。日志正在打印
isIdleNow: false
只有一次,这很奇怪。
没有太多明显的例子如何使用IdlingResource,所以也许有人可以为我说清楚。感谢。
答案 0 :(得分:0)
只有与onView(...)。check(...)或onData(...)一起使用时,你的IdlingResource才有效。检查(...)。实际上,“魔术”将在支票调用中发生 - 它是Espresso等待的地方,直到没有正在运行的AsyncTasks或没有阻塞IdlingResources。
现在让我们更正您的代码以使其正常工作:
Activity activity = calibrationActivityRule.getActivity();
onView(withId(R.id.autocomplete_occupation)).perform(typeText("dok"));
IdlingResource idlingResource = new AutocompleteShowIdlingResource(activity, R.id.autocomplete_occupation);
try {
Espresso.registerIdlingResources(idlingResource);
//that's where Espresso will wait until the idling resource is idle
onData(anything()).inAdapter(withId(R.id.autocomplete_occupation)).check(matches(isDisplayed());
finally {
Espresso.unregisterIdlingResources(idlingResource);
}
assertEquals(((AutoCompleteTextView) activity.findViewById(R.id.autocomplete_occupation)).getAdapter().getCount(), 3);