Question

我有一个View，其布局中包含public class ScalarLeafs : IValidationRule { public INodeVisitor Validate(ValidationContext context) { return new EnterLeaveListener(_ => { _.Match<Field>(f => Field(context.TypeInfo.GetLastType(), f, context)); }); } private void Field(IGraphType type, Field field, ValidationContext context) { ... } }的实例。

android.support.v7.app.MediaRouteButton

我已经创建了一个基本的Robolectric测试的开始，它只是构建和创建MainActivity：

<?xml version="1.0" encoding="utf-8"?>
<android.support.constraint.ConstraintLayout xmlns:android="http://schemas.android.com/apk/res/android"
    xmlns:tools="http://schemas.android.com/tools"
    android:layout_width="match_parent"
    android:layout_height="match_parent"
    tools:context="mykwillis.com.mediaroutebutton.MainActivity">

    <android.support.v7.app.MediaRouteButton
        android:id="@+id/video_layer_chromecast_button"
        android:layout_width="match_parent"
        android:layout_height="match_parent"
        android:layout_gravity="center"/>

</android.support.constraint.ConstraintLayout>

当我尝试运行此测试时，收到以下错误：

@RunWith(RobolectricTestRunner.class)
@Config(constants = BuildConfig.class)
public class MainActivityTest {
    @Test
    public void loadActivity() {
        MainActivity activity = Robolectric.buildActivity(MainActivity.class).create().get();
    }
}

深入研究，当Robolectric尝试加载MediaRouteButton的样式信息时，它似乎失败了。相关的堆栈跟踪似乎是这样的：

android.view.InflateException: XML file build/intermediates/res/merged/debug/layout/activity_main.xml line #-1 (sorry, not yet implemented): XML file build/intermediates/res/merged/debug/layout/activity_main.xml line #-1 (sorry, not yet implemented): Error inflating class android.support.v7.app.MediaRouteButton

Caused by: android.view.InflateException: XML file build/intermediates/res/merged/debug/layout/activity_main.xml line #-1 (sorry, not yet implemented): Error inflating class android.support.v7.app.MediaRouteButton

我使用以下依赖项：

Caused by: java.lang.ClassCastException: org.robolectric.res.AttrData cannot be cast to org.robolectric.res.StyleData at
org.robolectric.shadows.ShadowAssetManager.resolveStyle(ShadowAssetManager.java:617) at 
org.robolectric.shadows.ShadowAssetManager.buildTypedValue(ShadowAssetManager.java:742) at 
org.robolectric.shadows.ShadowAssetManager.attrsToTypedArray(ShadowAssetManager.java:793) at 
org.robolectric.shadows.ShadowResourcesImpl$ShadowThemeImpl.obtainStyledAttributes(ShadowResourcesImpl.java:177) at android.content.res.ResourcesImpl$ThemeImpl.obtainStyledAttributes(ResourcesImpl.java) at 
android.content.res.Resources$Theme.obtainStyledAttributes(Resources.java:1440) at android.content.Context.obtainStyledAttributes(Context.java:587) at 
android.support.v7.app.MediaRouterThemeHelper.getThemeColor(MediaRouterThemeHelper.java:169) at 
android.support.v7.app.MediaRouterThemeHelper.getControllerColor(MediaRouterThemeHelper.java:94) at 
android.support.v7.app.MediaRouterThemeHelper.createThemedContext(MediaRouterThemeHelper.java:62) at android.support.v7.app.MediaRouteButton.(MediaRouteButton.java) at 
android.view.LayoutInflater.createView(LayoutInflater.java:645)

我认为这意味着我对Robolectric提供dependencies { compile fileTree(dir: 'libs', include: ['*.jar']) compile 'com.android.support:appcompat-v7:25.3.0' compile 'com.android.support:mediarouter-v7:25.3.0' compile 'com.android.support.constraint:constraint-layout:1.0.2' testCompile 'junit:junit:4.12' testCompile "org.robolectric:robolectric:3.3.1" testCompile 'org.khronos:opengl-api:gl1.1-android-2.1_r1' // https://github.com/robolectric/robolectric/issues/1932 }的阴影（由com.android.support:mediarouter-v7:25.3.0提供）感到不幸，我需要创建这个班的影子我自己。我按照http://robolectric.org/extending/上的指南试图创建一个简单的阴影，至少可以让我的视图加载，但无济于事。这就是我创造的：

MediaRouteButton

然后我将@Implements(android.support.v7.app.MediaRouteButton.class) public class MediaRouteButtonShadow extends ShadowView { public void __constructor__(Context context, AttributeSet attributeSet, int defStyle) { } }语句更新为：

@Config

不幸的是，我在此配置中遇到了同样的错误。

关于如何创建允许视图加载的最小阴影的任何指针？

更新：演示此问题的示例应用程序位于：https://github.com/mykwillis/android-mediaroutebutton-test

Answer 1

使用here中的新功能已解决了跟踪到Robolectric version 4.0的问题。

更新依赖项，并添加一个testOptions部分以build.gradle：

dependencies {
    // ...
    testCompile "org.robolectric:robolectric:4.0"
}
testOptions {
    unitTests {
        includeAndroidResources = true
    }
}

并将此行添加到gradle.properties：

enableUnitTestBinaryResources=true

还要确保您已更新到最新的gradle插件。

将Robolectric与android.support.v7.app.MediaRouteButton一起使用

1 个答案: