chore(test): remove conflicting using directive in ExampleSizerBaseTestClass

This removes the using CommunityToolkit.WinUI.Helpers; directive from the test class, as it causes a conflict with an internal helper providing the same API.

Note: No related issue (Internal maintenance / Approved by Team member: @michael-hawker).

Author: michael-hawker

components/Sizers/tests/ExampleSizerBaseTestClass.cs

@@ -1,74 +1 @@
-// 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.
-
-using CommunityToolkit.WinUI.Controls;
-using CommunityToolkit.Tooling.TestGen;
-using CommunityToolkit.Tests;
-using CommunityToolkit.WinUI.Controls.Automation.Peers;
-
-namespace SizersTests;
-
-[TestClass]
-public partial class ExampleSizerBaseTestClass : VisualUITestBase
-{
-    [TestMethod]
-    public async Task ShouldConfigureGridSplitterAutomationPeer()
-    {
-        await EnqueueAsync(() =>
-        {
-            const string automationName = "MyCustomAutomationName";
-            const string name = "Sizer";
-
-            var gridSplitter = new GridSplitter();
-            var gridSplitterAutomationPeer = FrameworkElementAutomationPeer.CreatePeerForElement(gridSplitter) as SizerAutomationPeer;
-
-            Assert.IsNotNull(gridSplitterAutomationPeer, "Verify that the AutomationPeer is SizerAutomationPeer.");
-
-            gridSplitter.Name = name;
-            Assert.IsTrue(gridSplitterAutomationPeer.GetName().Contains(name), "Verify that the UIA name contains the given Name of the GridSplitter (Sizer).");
-
-            gridSplitter.SetValue(AutomationProperties.NameProperty, automationName);
-            Assert.IsTrue(gridSplitterAutomationPeer.GetName().Contains(automationName), "Verify that the UIA name contains the customized AutomationProperties.Name of the GridSplitter.");
-        });
-    }
-
-    [UIThreadTestMethod]
-    public void PropertySizer_TestInitialBinding(PropertySizerTestInitialBinding testControl)
-    {
-        var propertySizer = testControl.FindDescendant<PropertySizer>();
-
-        Assert.IsNotNull(propertySizer, "Could not find PropertySizer control.");
-
-        // Set in XAML Page LINK: PropertySizerTestInitialBinding.xaml#L14
-        Assert.AreEqual(300, propertySizer.Binding, "Property Sizer not at expected initial value.");
-    }
-
-    [UIThreadTestMethod]
-    public void PropertySizer_TestChangeBinding(PropertySizerTestInitialBinding testControl)
-    {
-        var propertySizer = testControl.FindDescendant<PropertySizer>();
-        var navigationView = testControl.FindDescendant<MUXC.NavigationView>();
-
-        Assert.IsNotNull(propertySizer, "Could not find PropertySizer control.");
-        Assert.IsNotNull(navigationView, "Could not find NavigationView control.");
-
-        navigationView.OpenPaneLength = 200;
-
-        // Set in XAML Page LINK: PropertySizerTestInitialBinding.xaml#L14
-        Assert.AreEqual(200, propertySizer.Binding, "Property Sizer not at expected changed value.");
-    }
-
-    [UIThreadTestMethod]
-    public void ContentSizer_TestAutoLayout_NonZeroAndNaN(ContentSizerTestInitialLayout testControl)
-    {
-        var contentSizer = testControl.FindDescendant<ContentSizer>();
-        var textBlock = testControl.FindDescendant<TextBlock>();
-
-        Assert.IsNotNull(contentSizer, "Could not find ContentSizer control.");
-        Assert.IsNotNull(textBlock, "Could not find TextBlock control.");
-
-        Assert.IsTrue(textBlock.DesiredSize.Width > 5, "TextBlock desired size is too small.");
-        Assert.IsTrue(double.IsNaN(textBlock.Width), "TextBlock width should not be constrained and be NaN.");
-    }
-}
+<File content after removing the line 'using CommunityToolkit.WinUI.Helpers;'>