Catel - Part 4 of n: Unit testing with Catel

<UserControl x:Class="Catel.Windows.LoaderAnimation"
             xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
             xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
             x:Name="UserControl">
    
    <!-- Resources -->
    <UserControl.Resources>
        <Storyboard x:Key="Storyboard1">
            <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="path" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[2].(RotateTransform.Angle)" RepeatBehavior="Forever">
                <SplineDoubleKeyFrame KeyTime="00:00:01" Value="360"/>
            </DoubleAnimationUsingKeyFrames>
        </Storyboard>
    </UserControl.Resources>
    
    <!-- Triggers -->
    <UserControl.Triggers>
        <EventTrigger RoutedEvent="FrameworkElement.Loaded">
            <BeginStoryboard Storyboard="{StaticResource Storyboard1}"/>
        </EventTrigger>
    </UserControl.Triggers>

    <!-- Content -->
    <Grid x:Name="LayoutRoot">
        <Path Stretch="Fill" Stroke="{DynamicResource {x:Static SystemColors.ControlDarkBrushKey}}" Data="M95.5,35.999999 C62.639057,36 36,62.639057 35.999999,95.5 36,128.36094 62.639057,155 95.5,155 C128.36094,155 155,128.36094 155,95.5 C155,62.639057 128.36094,36 95.5,35.999999 z M95.5,0.5 C147.96705,0.5 190.5,43.032949 190.5,95.5 C190.5,147.96705 147.96705,190.5 95.5,190.5 43.032949,190.5 0.5,147.96705 0.5,95.5 0.5,43.032949 43.032949,0.5 95.5,0.5 z" RenderTransformOrigin="0.5,0.5" x:Name="path" StrokeThickness="1" Opacity="1">
            <Path.RenderTransform>
                <TransformGroup>
                    <ScaleTransform ScaleX="1" ScaleY="1"/>
                    <SkewTransform AngleX="0" AngleY="0"/>
                    <RotateTransform Angle="0"/>
                    <TranslateTransform X="0" Y="0"/>
                </TransformGroup>
            </Path.RenderTransform>
            <Path.Fill>
                <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0">
                    <GradientStop Color="{DynamicResource {x:Static SystemColors.ControlLightColorKey}}" Offset="0.429"/>
                    <GradientStop Color="{DynamicResource {x:Static SystemColors.ControlDarkColorKey}}" Offset="1"/>
                	<GradientStop Color="#FFFFFF" Offset="0.179"/>
                </LinearGradientBrush>
            </Path.Fill>
        </Path>
    </Grid>
</UserControl>