我试图调试大约3%时间内失败的Android UI测试。由于Robotium无法找到ImageButton对象,Android UI测试偶尔会失败
我们的测试类开始时是这样的:
@RunWith(AndroidJUnit4.class)
public class ActionWidgetAdapterTest {
private Solo solo;
@Rule
public ActivityTestRule<SampleContainer> mActivityRule = new ActivityTestRule<>(SampleContainer.class);
// SampleContainer is used exclusively for the test case and extends AppCompatActivity
@Before
public void setUp() throws Exception {
solo = new Solo(InstrumentationRegistry.getInstrumentation(), mActivityRule.getActivity());
}
@After
public void tearDown() throws Exception {
solo.finishOpenedActivities();
}
// rest of class
// [...]
}
有问题的测试案例如下:
@Test
@LargeTest
@FlakyTest
public void testAddActions() throws Exception {
final ArrayList<Action> actions = new ArrayList<>();
// Action is our in-house version of the Action class from the Leanback library
final Action a1 = new Action(0, "text1", R.drawable.action_button_focused);
final Action a2 = new Action(1, "text2", R.drawable.action_button_focused);
final Action a3 = new Action(0, "text3", R.drawable.action_button_focused);
final Action a4 = new Action(1, "text4", R.drawable.action_button_focused);
actions.add(a1);
actions.add(a2);
actions.add(a3);
actions.add(a4);
// handler for posting to the main thread
Handler mainHandler = new Handler(mActivityRule.getActivity().getBaseContext()
.getMainLooper());
Runnable myRunnable =() -> {
// add actions to adapter
mActivityRule.getActivity().mActionWidgetAdapter.addActions(actions);
};
mainHandler.post(myRunnable);
solo.sleep(1000); // pause to resolve any timing issues
assertTrue(mActivityRule.getActivity().mActionWidgetAdapter.getItemCount() == 4);
// test edge case - navigate all the way to the left
solo.sendKey(Solo.LEFT);
pressUpDownEnter();
solo.sendKey(Solo.LEFT);
pressUpDownEnter();
solo.sendKey(Solo.LEFT);
pressUpDownEnter();
solo.sendKey(Solo.LEFT);
pressUpDownEnter();
solo.sendKey(Solo.LEFT);
assertTrue(solo.getImageButton(0).isFocused());
assertFalse(solo.getImageButton(2).isFocused());
}
测试用例通过了绝大多数的时间。但是,执行assertTrue(solo.getImageButton(0).isFocused());
时出现故障的可能性很小; Robotium抱怨说“发现3个ImageButtons”。这似乎没有任何模式。我将Robotium框架升级到最新版本,但这并不能解决问题。
任何人都知道我们做错了什么?