C# 获取Windows Phone编码UI中矩形的填充颜色

我正在为一个简单的应用程序编写一些编码的UI测试，似乎无法获得查找矩形对象的代码。在特定情况下，矩形的颜色根据填充颜色显示两个字符串是否匹配

当尝试使用编码的UI测试生成器查找矩形时，将查找父对象而不是矩形。我还看到，当我手动搜索矩形时，代码返回无法找到矩形

下面是我尝试测试的页面的XAML：

<Page
x:Class="TestApp.ButtonTester"
xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
xmlns:local="using:TestApp"
xmlns:d="http://schemas.microsoft.com/expression/blend/2008"
xmlns:mc="http://schemas.openxmlformats.org/markup-compatibility/2006"
mc:Ignorable="d"
Background="{ThemeResource ApplicationPageBackgroundThemeBrush}">

<Grid x:Name="LayoutRoot">

    <Grid.ChildrenTransitions>
        <TransitionCollection>
            <EntranceThemeTransition/>
        </TransitionCollection>
    </Grid.ChildrenTransitions>

    <Grid.RowDefinitions>
        <RowDefinition Height="Auto"/>
        <RowDefinition Height="*"/>
    </Grid.RowDefinitions>

    <!-- Title Panel -->
    <StackPanel Grid.Row="0" Margin="19,0,0,0">
        <TextBlock Text="{StaticResource AppName}" Style="{ThemeResource TitleTextBlockStyle}" Margin="0,12,0,0"/>
        <TextBlock Name="pageTitle" Text="Button Tester" Margin="0,-6.5,0,26.5" Style="{ThemeResource HeaderTextBlockStyle}" CharacterSpacing="{ThemeResource PivotHeaderItemCharacterSpacing}"/>
    </StackPanel>

    <!--TODO: Content should be placed within the following grid-->
    <Grid Grid.Row="1" x:Name="ContentRoot" Margin="19,9.5,19,0">
        <StackPanel Name="buttonValidator">
            <TextBlock Name="verifyText" Text="Hi" HorizontalAlignment="Center" Style="{StaticResource LargeText}"/>
            <Button Name="changeText" Content="Change Text" HorizontalAlignment="Center" Click="changeText_Click"/>
            <TextBox Name="guessText" Text="Enter Text From Above" TextAlignment="Center" GotFocus="guessText_GotFocus" KeyDown="guessText_KeyDown"/>
            <Button Name="verifyMatch" Content="Verify" HorizontalAlignment="Center" Click="verifyMatch_Click"/>
            <Rectangle Name="matchAlert" Height="50" Width="50" Fill="Black" HorizontalAlignment="Center"/>
        </StackPanel>
    </Grid>
</Grid>

我还看到测试生成器无法检测矩形，即使它被用作控件

我还研究了Rectangle类和Button类，它们的继承链中的第一个常见链接是Windows.UI.Xaml.FrameworkElement。我不知道编码的UI能够检测到什么类型的项目，以知道这是否是问题的原因

[TestMethod]
    public void TestVerifyIncorrect()
    {
        UITestControl verifyMatch = new UITestControl(myApp);
        verifyMatch.TechnologyName = "UIA";

        verifyMatch.SearchProperties.Add("ControlType", "Button");
        verifyMatch.SearchProperties.Add("AutomationId", "verifyMatch");

        Gesture.Tap(verifyMatch);

        UITestControl matchAlert = new UITestControl(myApp);
        matchAlert.TechnologyName = "UIA";

        matchAlert.SearchProperties.Add("ControlType", "Rectangle");
        matchAlert.SearchProperties.Add("AutomationId", "matchAlert");

        var fillColor = matchAlert.GetProperty("Fill");
    }