Using Espresso how do i check the number of items in my alert Dialog
android, android-espresso, android-testing, hamcrest
Solution
this is what i came up with add method to whatever custom matcher library you use.
public static Matcher<View> hasChildren(final Matcher<Integer> numChildrenMatcher) {
return new TypeSafeMatcher<View>() {
/**
* matching with viewgroup.getChildCount()
*/
@Override
public boolean matchesSafely(View view) {
return view instanceof ViewGroup && numChildrenMatcher.matches(((ViewGroup)view).getChildCount());
}
/**
* gets the description
*/
@Override
public void describeTo(Description description) {
description.appendText(" a view with # children is ");
numChildrenMatcher.describeTo(description);
}
};
}
Usage is:
int numKids = 3;
onView(withId(R.id.view_pager)).check(matches(allOf(
isDisplayed(),
hasChildren(is(numKids))
)));
Problem
I have an alert dialog that displays a number of items. ``` private String[] choices; // populated externally AlertDialog.Builder builder = new AlertDialog.Builder(getActivity()); builder.setItems(choices, new DialogInterface.OnClickListener() { @Override public void onClick(DialogInterface dialog, int which) { _callback.onChoiceSelected(which); dialog.dismiss(); } }); _dialog = builder.create(); ``` Under different circumstances (for e.g. if you're an admin/guest) you will have a different number of "choices". In my espresso test, I'm basically trying to test the number of items present. ``` public void test_ViewsSetupCorrectly() { onView(withId(R.id.settings)).perform(click()); onView(ViewMatchers.withChild(withClassName(Matchers.equalToIgnoringCase("TextView")))).check(matches(isDisplayed())); /*// What I would ideally like ... but doesn't work as well :( : onView(withClassName(equalToIgnoringWhiteSpace("DialogTitle"))).check(matches(hasProperty("child-count", is(new Integer(1)) )));*/ } ``` These basically throw an exception like so: I presume the onData call is only for performing actions? I'm not performing an action necessarily. Could anyone help me actually test this? ``` com.google.android.apps.common.testing.ui.espresso.NoMatchingViewException: No views in hierarchy found matching: has child: with class name: eqIgnoringCase("TextView") If the target view is not part of the view hierarchy, you may need to use Espresso.onData to load it from one of the following AdapterViews:com.android.internal.app.AlertController$RecycleListView@5389ef7c View Hierarchy: +>DecorView{id=-1, visibility=VISIBLE, width=684, height=226, has-focus=true, has-focusable=true, 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=0.0, y=0.0, child-count=1} | +->FrameLayout{id=-1, visibility=VISIBLE, width=684, height=226, has-focus=true, has-focusable=true, 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=0.0, y=0.0, child-count=2} | +-->FrameLayout{id=16908290, res-name=content, visibility=VISIBLE, width=684, height=226, has-focus=true, has-focusable=true, 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=0.0, y=0.0, child-count=1} | +--->LinearLayout{id=16908874, res-name=parentPanel, visibility=VISIBLE, width=652, height=226, has-focus=true, has-focusable=true, 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=16.0, y=0.0, child-count=4} | +---->LinearLayout{id=16908875, res-name=topPanel, visibility=GONE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=3} | +----->View{id=16908885, res-name=titleDividerTop, visibility=GONE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0} | +----->LinearLayout{id=16908876, res-name=title_template, visibility=GONE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=2} | +------>ImageView{id=16908294, res-name=icon, visibility=GONE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0} | +------>DialogTitle{id=16908877, res-name=alertTitle, visibility=VISIBLE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, text=, input-type=0, ime-target=false} | +----->View{id=16908878, res-name=titleDivider, visibility=GONE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0} | +---->LinearLayout{id=16908882, res-name=contentPanel, visibility=VISIBLE, width=652, height=226, has-focus=true, has-focusable=true, 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=0.0, y=0.0, child-count=1} | +----->RecycleListView{id=16909101, res-name=select_dialog_listview, visibility=VISIBLE, width=620, height=194, has-focus=true, has-focusable=true, has-window-focus=true, is-clickable=true, is-enabled=true, is-focused=true, is-focusable=true, is-layout-requested=false, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=16.0, y=16.0, child-count=2} | +------>TextView{id=16908308, res-name=text1, visibility=VISIBLE, width=620, height=96, 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=0.0, y=0.0, text=Edit Info, input-type=0, ime-target=false} | +------>TextView{id=16908308, res-name=text1, visibility=VISIBLE, width=620, height=96, 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=0.0, y=98.0, text=Use gallery photo, input-type=0, ime-target=false} | +---->FrameLayout{id=16908884, res-name=customPanel, visibility=GONE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=1} | +----->FrameLayout{id=16908331, res-name=custom, visibility=VISIBLE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=0} | +---->LinearLayout{id=16908879, res-name=buttonPanel, visibility=GONE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=1} | +----->LinearLayout{id=-1, visibility=VISIBLE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, child-count=3} | +------>Button{id=16908314, res-name=button2, visibility=GONE, width=0, height=0, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=true, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, text=, input-type=0, ime-target=false} | +------>Button{id=16908315, res-name=button3, visibility=GONE, width=0, height=0, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=true, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, text=, input-type=0, ime-target=false} | +------>Button{id=16908313, res-name=button1, visibility=GONE, width=0, height=0, has-focus=false, has-focusable=false, has-window-focus=true, is-clickable=true, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0, text=, input-type=0, ime-target=false} | +-->ViewStub{id=16909076, visibility=GONE, width=0, height=0, 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=true, is-selected=false, root-is-layout-requested=false, has-input-connection=false, x=0.0, y=0.0} | at dalvik.system.VMStack.getThreadStackTrace(Native Method) at java.lang.Thread.getStackTrace(Thread.java:591) at com.google.android.apps.common.testing.ui.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:69) 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:159) at com.google.android.apps.common.testing.ui.espresso.ViewInteraction.check(ViewInteraction.java:133) at java.lang.reflect.Method.invokeNative(Native Method) at android.test.InstrumentationTestCase.runMethod(InstrumentationTestCase.java:214) at android.test.InstrumentationTestCase.runTest(InstrumentationTestCase.java:199) at android.test.ActivityInstrumentationTestCase2.runTest(ActivityInstrumentationTestCase2.java:192) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:190) at android.test.AndroidTestRunner.runTest(AndroidTestRunner.java:175) at android.test.InstrumentationTestRunner.onStart(InstrumentationTestRunner.java:555) at com.google.android.apps.common.testing.testrunner.GoogleInstrumentationTestRunner.onStart(GoogleInstrumentationTestRunner.java:167) at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:1584) ```