我一直在尝试使用Espresso来测试具有菜单抽屉的应用。
现在为了陌生。
在第一次测试中，我打开抽屉并点击一个项目，然后继续进行剩下的测试。一切都很好。
当我添加第二个完全相同的测试时，我得到一个例外。它似乎与菜单抽屉的内容有关，但我不知所措。
例外是：
com.google.android.apps.common.testing.ui.espresso.PerformException: Error performing 'single click' on view '(with id: is <2131099739> and with text: is "Events")'.
at com.google.android.apps.common.testing.ui.espresso.PerformException$Builder.build(PerformException.java:67)
at com.google.android.apps.common.testing.ui.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:57)
at com.google.android.apps.common.testing.ui.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:40)
at com.google.android.apps.common.testing.ui.espresso.ViewInteraction.runSynchronouslyOnUiThread(ViewInteraction.java:146)
at com.google.android.apps.common.testing.ui.espresso.ViewInteraction.doPerform(ViewInteraction.java:77)
at com.google.android.apps.common.testing.ui.espresso.ViewInteraction.perform(ViewInteraction.java:69)
at com.xxx.app.events.StackOverflowExampleTest.selectMenu(StackOverflowExampleTest.java:83)
at com.xxx.app.events.StackOverflowExampleTest.setUp(StackOverflowExampleTest.java:72)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:192)
at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:177)
at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555)
at com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner.onStart(GoogleInstrumentationTestRunner.java:119)
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1608)
Caused by: java.lang.RuntimeException: Action will not be performed because the target view does not match one or more of the following constraints:
at least 90 percent of the view's area is displayed to the user.
Target view: "TextView{id=2131099739, res-name=menu_item_content, visibility=VISIBLE, width=432, height=112, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=false, is-enabled=true, is-focused=false, is-focusable=false, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=24.0, y=2.0, text=Events, input-type=0, ime-target=false}"
at com.google.android.apps.common.testing.ui.espresso.ViewInteraction$1.run(ViewInteraction.java:100)
at java.util.concurrent.Executors$RunnableAdapter.call(Executors.java:442)
at java.util.concurrent.FutureTask$Sync.innerRun(FutureTask.java:305)
at java.util.concurrent.FutureTask.run(FutureTask.java:137)
at android.os.Handler.handleCallback(Handler.java:615)
at android.os.Handler.dispatchMessage(Handler.java:92)
at android.os.Looper.loop(Looper.java:137)
at android.app.ActivityThread.main(ActivityThread.java:4898)
at java.lang.reflect.Method.invokeNative(Native Method)
at com.android.internal.os.ZygoteInit$MethodAndArgsCaller.run(ZygoteInit.java:1006)
at com.android.internal.os.ZygoteInit.main(ZygoteInit.java:773)
at dalvik.system.NativeStart.main(Native Method)
这是测试类
public class StackOverflowExampleTest extends ActivityInstrumentationTestCase2<MainActivity_>
{
public StackOverflowExampleTest()
{
super(MainActivity_.class);
}
/**
* Basic check for content displayed
*/
@SuppressWarnings("unchecked")
public void testSanityCheck()
{
// check title is shown
onView(allOf(withId(R.id.event_view_title), isDisplayed())).check(
matches(withText("Isaac Vladimir Sinead Stacey"))); //$NON-NLS-1$
// check content is shown
onView(allOf(withId(R.id.event_view_text), isDisplayed())).check(
matches(withText(startsWith("Arcu ipsumcurabitur. Aliquammauris sodalessed arcu.")))); //$NON-NLS-1$
// check "more details" is shown
onView(allOf(withId(R.id.event_view_link), isDisplayed()))
.check(matches(withText(R.string.events_button_text)));
}
/**
* Basic check for content displayed
*/
@SuppressWarnings("unchecked")
public void testSanityCheck2()
{
// check title is shown
onView(allOf(withId(R.id.event_view_title), isDisplayed())).check(
matches(withText("Isaac Vladimir Sinead Stacey"))); //$NON-NLS-1$
// check content is shown
onView(allOf(withId(R.id.event_view_text), isDisplayed())).check(
matches(withText(startsWith("Arcu ipsumcurabitur. Aliquammauris sodalessed arcu.")))); //$NON-NLS-1$
// check "more details" is shown
onView(allOf(withId(R.id.event_view_link), isDisplayed()))
.check(matches(withText(R.string.events_button_text)));
}
@Override
protected void setUp() throws Exception
{
super.setUp();
// start the activity
this.getActivity();
// show events fragment
this.selectMenu(R.string.menu_item_events);
}
@SuppressWarnings("unchecked")
@TargetApi(Build.VERSION_CODES.HONEYCOMB)
protected void selectMenu(final int menuItemResId)
{
// open the drawer
onView(withId(android.R.id.home)).perform(click());
// click the supplied menu item (aka list item)
onView(allOf(withId(R.id.menu_item_content), withText(this.getActivity().getString(menuItemResId)))).perform(
click());
}
}
答案 0 :(得分：15)
当您要操作的视图在屏幕上看不到或部分可见时，我遇到了同样的问题。因此，如果您对屏幕上的某些视图有问题 - 只需滚动到它然后单击：
onView(withId(is(R.id.button_login))).perform(
scrollTo(),
click());
如果您在抽屉中出现此问题，该问题包含项目列表，并且您想要单击不可见的项目 - 请使用onData（...）。但您必须先显示抽屉（请参阅如何打开抽屉here）：
onData(is(instanceOf(com.your.package.SomeDrawerItem.class)))
.inAdapterView(withId(R.id.drawer_listview))
.atPosition(itemPositionInDrawer).perform(click());
答案 1 :(得分：1)
看起来抽屉里的视图还不可见。您可以尝试在对其执行任何操作之前声明视图的可见性：
assertTrue(withEffectiveVisibility(Visibility.VISIBLE).matches(myView));
assertFalse(withEffectiveVisibility(Visibility.VISIBLE).matches(myView));