Align test namespaces to avoid component class name conflicts.

- Components with classes matching the component name had an invalid namespace declared for test projects.
- Previously, the test namespace would have looked like `ComponentNameExperiment.Tests`, but was changed to look like `ComponentName.Tests`.
- In places where `ComponentName` is an existing class, this causes the observed error.
 -We were unable to use a unified namespace here due to the layout change it causes in the Visual Studio Test Explorer, breaking the existing grouping.
 - To fix the issue "'SomeComponent' is a namespace but is used like a type" while keeping known behavior, we simply remove the `.` in namespace declarations for `SomeComponent.Tests`.

Author: Arlodotexe

components/Animations/tests/Animations.Tests.projitems

@@ -6,7 +6,7 @@
     <SharedGUID>39585FC1-232A-4F67-BFB8-7F6DEE296763</SharedGUID>
   </PropertyGroup>
   <PropertyGroup Label="Configuration">
-    <Import_RootNamespace>Animations.Tests</Import_RootNamespace>
+    <Import_RootNamespace>AnimationsTests</Import_RootNamespace>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="$(MSBuildThisFileDirectory)Test_AnimationBuilderStart.cs" />

components/Animations/tests/Test_AnimationBuilderStart.cs

@@ -6,7 +6,7 @@
 using CommunityToolkit.WinUI.Animations;
 using System.Numerics;
 
-namespace Animations.Tests;
+namespace AnimationsTests;
 
 [TestClass]
 [TestCategory(nameof(Test_AnimationBuilderStart))]

components/Animations/tests/Test_ExpressionFunctions.cs

@@ -15,7 +15,7 @@
 using CommunityToolkit.Tooling.TestGen;
 using CommunityToolkit.WinUI.Animations.Expressions;
 
-namespace Animations.Tests;
+namespace AnimationsTests;
 
 [TestClass]
 [TestCategory(nameof(Test_ExpressionFunctions))]

components/Behaviors/tests/Behaviors.Tests.projitems

@@ -6,7 +6,7 @@
     <SharedGUID>C5924901-9000-4A6D-936D-BD69944E8C8F</SharedGUID>
   </PropertyGroup>
   <PropertyGroup Label="Configuration">
-    <Import_RootNamespace>Behaviors.Tests</Import_RootNamespace>
+    <Import_RootNamespace>BehaviorsTests</Import_RootNamespace>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="$(MSBuildThisFileDirectory)StackedNotificationsBehaviorsTestPage.xaml.cs">

components/Behaviors/tests/StackedNotificationsBehaviorTestClass.cs

@@ -2,13 +2,13 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-using Behaviors.Tests;
+using BehaviorsTests;
 using CommunityToolkit.Tests;
 using CommunityToolkit.Tooling.TestGen;
 using CommunityToolkit.WinUI.Behaviors;
 using Microsoft.Xaml.Interactivity;
 
-namespace StackedNotificationsBehavior.Tests;
+namespace StackedNotificationsBehaviorTests;
 
 [TestClass]
 public partial class StackedNotificationsBehaviorTestClass : VisualUITestBase

components/Behaviors/tests/StackedNotificationsBehaviorsTestPage.xaml

@@ -1,5 +1,5 @@
 <!--  Licensed to the .NET Foundation under one or more agreements. The .NET Foundation licenses this file to you under the MIT license. See the LICENSE file in the project root for more information.  -->
-<Page x:Class="Behaviors.Tests.StackedNotificationsBehaviorsTestPage"
+<Page x:Class="BehaviorsTests.StackedNotificationsBehaviorsTestPage"
       xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
       xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
       xmlns:behaviors="using:CommunityToolkit.WinUI.Behaviors"

components/Behaviors/tests/StackedNotificationsBehaviorsTestPage.xaml.cs

@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-namespace Behaviors.Tests;
+namespace BehaviorsTests;
 
 /// <summary>
 /// An empty page that can be used on its own or navigated to within a Frame.

components/CameraPreview/tests/CameraPreview.Tests.projitems

@@ -6,6 +6,6 @@
     <SharedGUID>E4B3B38E-CB22-4C76-8906-018E2191DA41</SharedGUID>
   </PropertyGroup>
   <PropertyGroup Label="Configuration">
-    <Import_RootNamespace>CameraPreview.Tests</Import_RootNamespace>
+    <Import_RootNamespace>CameraPreviewTests</Import_RootNamespace>
   </PropertyGroup>
 </Project>

components/Collections/tests/Collections.Tests.projitems

@@ -6,7 +6,7 @@
     <SharedGUID>B5DDFE59-3189-4B41-BE43-C90F53367C94</SharedGUID>
   </PropertyGroup>
   <PropertyGroup Label="Configuration">
-    <Import_RootNamespace>Collections.Tests</Import_RootNamespace>
+    <Import_RootNamespace>CollectionsTests</Import_RootNamespace>
   </PropertyGroup>
   <ItemGroup>
     <Compile Include="$(MSBuildThisFileDirectory)Test_AdvancedCollectionView.cs" />

components/Collections/tests/DataSource.cs

@@ -2,7 +2,7 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 // See the LICENSE file in the project root for more information.
 
-namespace Collections.Tests;
+namespace CollectionsTests;
 
 using CommunityToolkit.WinUI.Collections;
 public class DataSource<T> : IIncrementalSource<T>