Espresso测试NestedScrollView - "执行错误'滚动到'视图' ID:"

时间:2016-09-22 15:04:58

标签: java android testing android-espresso nestedscrollview

我需要向下滚动浏览我的NestedScrollView以使用Espresso测试我的xml文件,但是我收到错误消息:"错误执行'滚动到'在视图' id:"

其他一些似乎有类似问题的帖子。

我已遵循以下说明:Android espresso NestedScrollView, how to scroll to bottom

现在我收到了上述错误,并发现了这篇文章:Scrolling to view was attempted, but the view is not displayed

我的NestedScrollView中没有填充 - 我甚至尝试从XML中删除填充,用于测试目的,但它没有任何区别。

这是我的测试(到目前为止它不应该做任何事情,但向下滚动):

    @Test
    public void testScrollDownAbilityOfDetailsScrollView(){
        goToSpecificItemOnStream(streamItemWithOneImage);

        onView(withId(R.id.end_of_details))
                .perform(ScrollToAction.betterScrollTo());

    }

它使用自定义的Scroll To Action类:

    public final class ScrollToAction implements ViewAction {

    private static final String TAG = ScrollToAction.class.getSimpleName();

    @SuppressWarnings("unchecked")
    @Override
    public Matcher<View> getConstraints() {
        return allOf(withEffectiveVisibility(Visibility.VISIBLE), isDescendantOfA(anyOf(
                isAssignableFrom(ScrollView.class),    isAssignableFrom(HorizontalScrollView.class), isAssignableFrom(NestedScrollView.class))));
    }

    @Override
    public void perform(UiController uiController, View view) {
        if (isDisplayingAtLeast(80).matches(view)) {
            Log.i(TAG, "View is already displayed. Returning.");
            return;
        }
        Rect rect = new Rect();
        view.getDrawingRect(rect);
        if (!view.requestRectangleOnScreen(rect, true /* immediate */)) {
            Log.w(TAG, "Scrolling to view was requested, but none of the parents      scrolled.");
        }
        uiController.loopMainThreadUntilIdle();
        if (!isDisplayingAtLeast(80).matches(view)) {
            throw new PerformException.Builder()
                    .withActionDescription(this.getDescription())
                    .withViewDescription(HumanReadables.describe(view))
                    .withCause(new RuntimeException(
                            "Scrolling to view was attempted, but the view is not displayed"))
                    .build();
        }
    }
    public static ViewAction betterScrollTo() {
        return ViewActions.actionWithAssertions(new ScrollToAction());
    }

    @Override
    public String getDescription() {
        return "scroll to";
    }}

自定义ScrollToAction类是因为普通的scrollTo方法硬编码到ScrollView和Horizo​​ntalScrollView,而不是NestedScrollView。

这是我要测试的XML文件:

       <?xml version="1.0" encoding="utf-8"?>
       <android.support.v4.widget.NestedScrollView    xmlns:android="http://schemas.android.com/apk/res/android"
        xmlns:app="http://schemas.android.com/apk/res-auto"
        android:id="@+id/scrollView"
        xmlns:tools="http://schemas.android.com/tools"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        app:layout_behavior="@string/appbar_scrolling_view_behavior">

        <RelativeLayout
            android:layout_width="wrap_content"
            android:layout_height="wrap_content"
            android:orientation="horizontal">



            <FrameLayout
                android:id="@+id/fl"
                android:background="#FBFBFB"
                android:layout_margin="0dp"
                android:layout_width="match_parent"
                android:layout_height="350dp">

                <android.support.v4.view.ViewPager
                    android:id="@+id/container"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    app:layout_behavior="@string/appbar_scrolling_view_behavior" />

                <ImageView
                    android:id="@+id/location"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_margin="@dimen/text_margin"
                    android:layout_gravity="left|top"
                    android:background="@null"
                    android:src="@drawable/ic_location_white"
                    android:paddingLeft="-8dp" />


                <TextView
                    android:id="@+id/textViewDistance"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_toRightOf="@id/location"
                    android:textAppearance="?android:attr/textAppearanceMedium"
                    android:layout_margin="@dimen/text_margin"
                    android:layout_gravity="left|top"
                    android:shadowColor="#262424"
                    android:shadowDx="1"
                    android:shadowDy="1"
                    android:shadowRadius="2"
                    android:textColor="#FBFBFB"
                    android:textSize="22dp"
                    android:singleLine="false"
                    android:paddingLeft="24dp" />


                <TextView
                    android:id="@+id/textViewPrice"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:textAppearance="?android:attr/textAppearanceMedium"
                    android:layout_margin="@dimen/text_margin"
                    android:layout_gravity="right|top"
                    android:shadowColor="#262424"
                    android:shadowDx="1"
                    android:shadowDy="1"
                    android:shadowRadius="2"
                    android:textColor="#FBFBFB"

                    android:textSize="22dp"/>

                <me.relex.circleindicator.CircleIndicator
                    android:id="@+id/indicator"
                    android:layout_width="match_parent"
                    android:layout_height="40dp"
                    android:layout_gravity="bottom"
                    android:shadowColor="#262424"
                    android:shadowDx="1"
                    android:shadowDy="1"
                    android:shadowRadius="1"/>



            </FrameLayout>


            <LinearLayout

                android:layout_below="@id/fl"
                android:layout_width="match_parent"
                android:layout_height="match_parent"
                android:orientation="vertical"
                >

                <TextView
                    android:id="@+id/textViewTitle"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:gravity="left"
                    android:layout_margin="@dimen/text_margin"
                    android:textColor="@color/colorCheckTomBlack"
                    android:textStyle="bold"
                    android:textSize="20dp" />

                <TextView
                    android:id="@+id/textViewDescription"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_marginLeft="@dimen/text_margin"
                    android:layout_marginRight="@dimen/text_margin"
                    android:gravity="left"
                    android:textColor="@color/colorCheckTomBlack"
                    android:textSize="18dp"
                    android:layout_weight="0.56" />

                <RelativeLayout
                    android:layout_width="match_parent"
                    android:layout_height="65dp"
                    android:paddingTop="30dp">


                    <ImageButton
                        android:id="@+id/buttonWatchlist"
                        android:src="@drawable/ic_checktom"
                        android:background="@null"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:gravity="left"
                        android:layout_marginLeft="55dp"
                        android:layout_marginStart="55dp"
                        android:layout_alignParentTop="true"
                        android:layout_alignParentLeft="true"
                        android:layout_alignParentStart="true"
                        android:onClick="launchWatchlistActivity"
                        android:paddingTop="2dp"/>


                    <ImageButton
                        android:id="@+id/buttonMessage"
                        android:src="@drawable/ic_messages"
                        android:background="@null"
                        android:scaleX="1.2"
                        android:scaleY="1.2"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center_horizontal"
                        android:layout_alignParentTop="true"
                        android:layout_centerHorizontal="true"
                        android:onClick="launchMessageActivity"
                        android:paddingTop="7dp"/>


                    <ImageButton
                        android:id="@+id/buttonShare"
                        android:src="@drawable/ic_share"
                        android:background="@null"
                        android:scaleX="1.5"
                        android:scaleY="1.5"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_marginRight="54dp"
                        android:layout_marginEnd="54dp"
                        android:layout_alignParentTop="true"
                        android:layout_alignParentRight="true"
                        android:layout_alignParentEnd="true"
                        android:onClick="launchShareActivity"/>



                </RelativeLayout>


                <RelativeLayout
                    android:orientation="horizontal"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:padding="2dp">


                    <TextView
                        android:id="@+id/textViewWatchlist"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Watchlist"
                        android:layout_marginLeft="41dp"
                        android:layout_marginStart="41dp"
                        android:layout_alignParentTop="true"
                        android:layout_alignParentLeft="true"
                        android:layout_alignParentStart="true" />


                    <TextView
                        android:id="@+id/textViewMessage"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Message"
                        android:layout_gravity="center_horizontal"
                        android:layout_alignParentTop="true"
                        android:layout_centerHorizontal="true" />

                    <TextView
                        android:id="@+id/textViewShare"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:text="Share"
                        android:layout_gravity="center_horizontal"
                        android:layout_alignParentTop="true"
                        android:layout_alignParentRight="true"
                        android:layout_alignParentEnd="true"
                        android:layout_marginRight="52dp"
                        android:layout_marginEnd="52dp" />


                </RelativeLayout>
                <LinearLayout
                    android:orientation="horizontal"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center">


                <TextView
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:text="_________________________________________"
                    android:paddingTop="25dp"/>


                </LinearLayout>

                <LinearLayout
                    android:orientation="horizontal"
                    android:layout_width="wrap_content"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center">

                    <de.hdodenhof.circleimageview.CircleImageView
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_below="@+id/imageView"
                        android:layout_centerHorizontal="true"
                        android:id="@+id/circleView"
                        android:scaleX="0.4"
                        android:scaleY="0.4"
                        android:layout_marginTop="-20dp"
                        android:layout_marginBottom="-60dp"
                        />       

                </LinearLayout>

                <LinearLayout
                    android:orientation="vertical"
                    android:layout_width="match_parent"
                    android:layout_height="wrap_content"
                    android:layout_gravity="center">     
                    <LinearLayout
                        android:orientation="horizontal"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center">     
                    <TextView
                        android:id="@+id/textViewSellerName"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:textSize="18dp"/>     
                        </LinearLayout>        
                    <LinearLayout
                        android:orientation="horizontal"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:layout_gravity="center">     
                    <TextView
                        android:id="@+id/textViewSellerDestination"
                        android:layout_width="wrap_content"
                        android:layout_height="wrap_content"
                        android:paddingBottom="20dp" />     
                        <TextView
                            android:id="@+id/end_of_details"
                            android:layout_width="match_parent"
                            android:layout_height="wrap_content" />
                        </LinearLayout>        
                </LinearLayout>
            </LinearLayout>
        </RelativeLayout>
    </android.support.v4.widget.NestedScrollView>

当测试失败时,这是我得到的完整输出:

  

android.support.test.espresso.PerformException:执行错误&#39;滚动到&#39;在视图&#39; id:com.checktom.checktom:id / end_of_details&#39;。       在android.support.test.espresso.PerformException $ Builder.build(PerformException.java:83)       在android.support.test.espresso.base.DefaultFailureHandler.getUserFriendlyError(DefaultFailureHandler.java:80)       在android.support.test.espresso.base.DefaultFailureHandler.handle(DefaultFailureHandler.java:56)       在android.support.test.espresso.ViewInteraction.runSynchronouslyOnUiThread(ViewInteraction.java:184)       在android.support.test.espresso.ViewInteraction.doPerform(ViewInteraction.java:115)       在android.support.test.espresso.ViewInteraction.perform(ViewInteraction.java:87)       at com.checktom.checktom.ApplicationTest.testScrollDownAbilityOfDetailsS​​crollView(ApplicationTest.java:279)       at java.lang.reflect.Method.invoke(Native Method)       在java.lang.reflect.Method.invoke(Method.java:372)       在org.junit.runners.model.FrameworkMethod $ 1.runReflectiveCall(FrameworkMethod.java:50)       在org.junit.internal.runners.model.ReflectiveCallable.run(ReflectiveCallable.java:12)       在org.junit.runners.model.FrameworkMethod.invokeExplosively(FrameworkMethod.java:47)       在org.junit.internal.runners.statements.InvokeMethod.evaluate(InvokeMethod.java:17)       在org.junit.internal.runners.statements.RunBefores.evaluate(RunBefores.java:26)       在android.support.test.internal.statement.UiThreadStatement.evaluate(UiThreadStatement.java:55)       在android.support.test.rule.ActivityTestRule $ ActivityStatement.evaluate(ActivityTestRule.java:270)       在org.junit.rules.RunRules.evaluate(RunRules.java:20)       在org.junit.runners.ParentRunner.runLeaf(ParentRunner.java:325)       在org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:78)       在org.junit.runners.BlockJUnit4ClassRunner.runChild(BlockJUnit4ClassRunner.java:57)       在org.junit.runners.ParentRunner $ 3.run(ParentRunner.java:290)       在org.junit.runners.ParentRunner $ 1.schedule(ParentRunner.java:71)       在org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)       在org.junit.runners.ParentRunner.access $ 000(ParentRunner.java:58)       在org.junit.runners.ParentRunner $ 2.evaluate(ParentRunner.java:268)       在org.junit.runners.ParentRunner.run(ParentRunner.java:363)       在org.junit.runners.Suite.runChild(Suite.java:128)       在org.junit.runners.Suite.runChild(Suite.java:27)       在org.junit.runners.ParentRunner $ 3.run(ParentRunner.java:290)       在org.junit.runners.ParentRunner $ 1.schedule(ParentRunner.java:71)       在org.junit.runners.ParentRunner.runChildren(ParentRunner.java:288)       在org.junit.runners.ParentRunner.access $ 000(ParentRunner.java:58)       在org.junit.runners.ParentRunner $ 2.evaluate(ParentRunner.java:268)       在org.junit.runners.ParentRunner.run(ParentRunner.java:363)       在org.junit.runner.JUnitCore.run(JUnitCore.java:137)       在org.junit.runner.JUnitCore.run(JUnitCore.java:115)       在android.support.test.internal.runner.TestExecutor.execute(TestExecutor.java:59)       在android.support.test.runner.AndroidJUnitRunner.onStart(AndroidJUnitRunner.java:262)       在android.app.Instrumentation $ InstrumentationThread.run(Instrumentation.java:1933)       引起:java.lang.RuntimeException:尝试滚动查看,但不显示视图       在com.checktom.checktom.ScrollToAction.perform(ScrollToAction.java:52)       在android.support.test.espresso.ViewInteraction $ 1.run(ViewInteraction.java:144)       at java.util.concurrent.Executors $ RunnableAdapter.call(Executors.java:422)       在java.util.concurrent.FutureTask.run(FutureTask.java:237)       在android.os.Handler.handleCallback(Handler.java:739)       在android.os.Handler.dispatchMessage(Handler.java:95)       在android.os.Looper.loop(Looper.java:145)       在android.app.ActivityThread.main(ActivityThread.java:6938)       at java.lang.reflect.Method.invoke(Native Method)       在java.lang.reflect.Method.invoke(Method.java:372)       在com.android.internal.os.ZygoteInit $ MethodAndArgsCaller.run(ZygoteInit.java:1404)       在com.android.internal.os.ZygoteInit.main(ZygoteInit.java:1199)        测试结束了。

我可以说我在ScrollToAction类的perform方法中遇到了运行时异常,但我还没有找到解决它的方法。

在我链接的第一篇文章中,新的BetterScrollTo方法看起来像一个魅力。

4 个答案:

答案 0 :(得分:6)

我这样做了:

onView(withId(R.id.viewToScroll)
                .perform(nestedScrollTo())
                .check(matches(isDisplayed()));

nestedScrollTo()的位置:

public static ViewAction nestedScrollTo() {
    return new ViewAction() {

        @Override
        public Matcher<View> getConstraints() {
            return Matchers.allOf(
                    isDescendantOfA(isAssignableFrom(NestedScrollView.class)),
                    withEffectiveVisibility(ViewMatchers.Visibility.VISIBLE));
        }

        @Override
        public String getDescription() {
            return "View is not NestedScrollView";
        }

        @Override
        public void perform(UiController uiController, View view) {
            try {
                NestedScrollView nestedScrollView = (NestedScrollView)
                        findFirstParentLayoutOfClass(view, NestedScrollView.class);
                if (nestedScrollView != null) {
                    nestedScrollView.scrollTo(0, view.getTop());
                } else {
                    throw new Exception("Unable to find NestedScrollView parent.");
                }
            } catch (Exception e) {
                throw new PerformException.Builder()
                        .withActionDescription(this.getDescription())
                        .withViewDescription(HumanReadables.describe(view))
                        .withCause(e)
                        .build();
            }
            uiController.loopMainThreadUntilIdle();
        }

    };
}

private static View findFirstParentLayoutOfClass(View view, Class<? extends View> parentClass) {
    ViewParent parent = new FrameLayout(view.getContext());
    ViewParent incrementView = null;
    int i = 0;
    while (parent != null && !(parent.getClass() == parentClass)) {
        if (i == 0) {
            parent = findParent(view);
        } else {
            parent = findParent(incrementView);
        }
        incrementView = parent;
        i++;
    }
    return (View) parent;
}

private static ViewParent findParent(View view) {
    return view.getParent();
}

private static ViewParent findParent(ViewParent view) {
    return view.getParent();
}

答案 1 :(得分:0)

您可以使用新的Espresso Test Recorder获取嵌套滚动的代码 -  看看Espresso Test Recorder

答案 2 :(得分:0)

我使用了此代码(受此SO answer的启发)

class MainMenuActivityTest
{
    @Test
    fun textInputDialog_opens_on_button_clicked()
    {
        onView(withId(R.id.text_input_button))
            .perform(betterScrollTo())
            .perform(click())
    }
}

// scroll-to action that also works with NestedScrollViews
class BetterScrollToAction:ViewAction by ScrollToAction()
{
    override fun getConstraints():Matcher<View>
    {
        return allOf(
                withEffectiveVisibility(Visibility.VISIBLE),
                isDescendantOfA(anyOf(
                        isAssignableFrom(ScrollView::class.java),
                        isAssignableFrom(HorizontalScrollView::class.java),
                        isAssignableFrom(NestedScrollView::class.java))))
    }
}

// convenience method
fun betterScrollTo():ViewAction
{
    return ViewActions.actionWithAssertions(BetterScrollToAction())
}

现在可以使用


起初,我使用的是this answer here,但是在测试时使用了以下代码:

class MainMenuActivityTest
{
    @Test
    fun textInputDialog_opens_on_button_clicked()
    {
        onView(withId(R.id.text_input_button))
            .perform(betterScrollTo())
            .perform(click())
    }
}

但是我有以下例外情况...

E/TestRunner: failed: textInputDialog_opens_on_button_clicked(com.github.ericytsang.example.app.android.MainMenuActivityTest)
----- begin exception -----
E/TestRunner: androidx.test.espresso.PerformException: Error performing 'scroll to' on view 'Animations or transitions are enabled on the target device.
For more info check: https://developer.android.com/training/testing/espresso/setup#set-up-environment

with id: com.github.ericytsang.app.example.android:id/text_input_button'.
............
at android.app.Instrumentation$InstrumentationThread.run(Instrumentation.java:2196)
Caused by: java.lang.RuntimeException: Action will not be performed because the target view does not match one or more of the following constraints:
(view has effective visibility=VISIBLE and is descendant of a: (is assignable from class: class android.widget.ScrollView or is assignable from class: class android.widget.HorizontalScrollView or is assignable from class: class android.widget.ListView))
Target view: "AppCompatButton{id=2131296521, res-name=text_input_button, visibility=VISIBLE, width=1008, height=107, has-focus=false, has-focusable=true, has-window-focus=true, is-clickable=true, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=false, is-selected=false, layout-params=androidx.appcompat.widget.LinearLayoutCompat$LayoutParams@cec11da, tag=null, root-is-layout-requested=false, has-input-connection=false, x=18.0, y=516.0, text=text input dialog, input-type=0, ime-target=false, has-links=false}"
at androidx.test.espresso.ViewInteraction.doPerform(ViewInterac
----- end exception -----

E/TestRunner: failed: textInputDialog_opens_on_button_clicked(com.github.ericytsang.example.app.android.MainMenuActivityTest)
----- begin exception -----
E/TestRunner: androidx.test.espresso.PerformException: Error performing 'scroll to' on view 'with id: com.github.ericytsang.app.example.android:id/text_input_button'.
........
Caused by: java.lang.RuntimeException: Action will not be performed because the target view does not match one or more of the following constraints:
(view has effective visibility=VISIBLE and is descendant of a: (is assignable from class: class android.widget.ScrollView or is assignable from class: class android.widget.HorizontalScrollView or is assignable from class: class android.widget.ListView))
Target view: "AppCompatButton{id=2131296521, res-name=text_input_button, visibility=VISIBLE, width=1008, height=107, has-focus=false, has-focusable=true, has-window-focus=true, is-clickable=true, is-enabled=true, is-focused=false, is-focusable=true, is-layout-requested=false, is-selected=false, layout-params=androidx.appcompat.widget.LinearLayoutCompat$LayoutParams@3e84212, tag=null, root-is-layout-requested=false, has-input-connection=false, x=18.0, y=516.0, text=text input dialog, input-type=0, ime-target=false, has-links=false}"
at androidx.test.espresso.ViewInteraction.doPerform(ViewInteraction.java:252)
at androidx.test.espresso.ViewInteraction.access$100(ViewInteraction.java:65)
at androidx.test.espresso.ViewInteraction$1.call(ViewInteraction.jav
----- end exception -----

答案 3 :(得分:0)

@Eric导入的答案是: 非常感谢Eric:)

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