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Added unit tests for new APIs
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‎UnitTests/UnitTests.UWP/Extensions/Test_VisualTreeExtensions.cs‎

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// The .NET Foundation licenses this file to you under the MIT license.
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// See the LICENSE file in the project root for more information.
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using System;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.Toolkit.Uwp;
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});
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}
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[TestCategory("VisualTree")]
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[TestMethod]
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[DataRow(SearchType.DepthFirst)]
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[DataRow(SearchType.BreadthFirst)]
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public async Task Test_VisualTree_FindDescendantByName_Exists(SearchType searchType)
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{
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await App.DispatcherQueue.EnqueueAsync(async () =>
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{
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var treeRoot = XamlReader.Load(@"<Page
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xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
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xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""> <!-- Starting Point -->
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<Grid>
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<Grid>
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<Border/>
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<StackPanel>
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<TextBox/>
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<TextBlock x:Name=""TargetElement""/> <!-- Target -->
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</StackPanel>
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</Grid>
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</Grid>
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</Page>") as Page;
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// Test Setup
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Assert.IsNotNull(treeRoot, "XAML Failed to Load");
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// Initialize Visual Tree
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await SetTestContentAsync(treeRoot);
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// Main Test
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var textBlock = treeRoot.FindDescendant("TargetElement", StringComparison.Ordinal, searchType);
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Assert.IsNotNull(textBlock, "Expected to find something.");
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Assert.IsInstanceOfType(textBlock, typeof(TextBlock), "Didn't find expected typed element.");
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Assert.AreEqual("TargetElement", textBlock.Name, "Didn't find named element.");
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});
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}
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[TestCategory("VisualTree")]
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[TestMethod]
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public async Task Test_VisualTree_FindDescendantByName_NotFound()
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});
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}
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[TestCategory("VisualTree")]
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[TestMethod]
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[DataRow(SearchType.DepthFirst)]
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[DataRow(SearchType.BreadthFirst)]
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public async Task Test_VisualTree_FindDescendant_Exists(SearchType searchType)
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{
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await App.DispatcherQueue.EnqueueAsync(async () =>
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{
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var treeRoot = XamlReader.Load(@"<Page
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xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
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xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""> <!-- Starting Point -->
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<Grid>
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<Grid>
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<Border/>
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<StackPanel>
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<TextBox/>
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<TextBlock/> <!-- Target -->
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</StackPanel>
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</Grid>
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</Grid>
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</Page>") as Page;
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// Test Setup
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Assert.IsNotNull(treeRoot, "XAML Failed to Load");
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// Initialize Visual Tree
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await SetTestContentAsync(treeRoot);
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// Main Test
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var textBlock = treeRoot.FindDescendant<TextBlock>(searchType);
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Assert.IsNotNull(textBlock, "Expected to find something.");
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Assert.IsInstanceOfType(textBlock, typeof(TextBlock), "Didn't find expected typed element.");
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});
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}
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[TestCategory("VisualTree")]
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[TestMethod]
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public async Task Test_VisualTree_FindDescendant_ItemsControl_Exists()
@@ -157,6 +231,46 @@ await App.DispatcherQueue.EnqueueAsync(async () =>
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});
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}
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[TestCategory("VisualTree")]
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[TestMethod]
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[DataRow(SearchType.DepthFirst)]
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[DataRow(SearchType.BreadthFirst)]
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public async Task Test_VisualTree_FindDescendant_ItemsControl_Exists(SearchType searchType)
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{
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await App.DispatcherQueue.EnqueueAsync(async () =>
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{
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var treeRoot = XamlReader.Load(@"<Page
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xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
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xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""> <!-- Starting Point -->
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<Grid>
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<Grid>
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<Border/>
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<Pivot>
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<PivotItem>
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<TextBox/>
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</PivotItem>
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<PivotItem>
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<TextBlock/> <!-- Target -->
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</PivotItem>
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</Pivot>
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</Grid>
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</Grid>
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</Page>") as Page;
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// Test Setup
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Assert.IsNotNull(treeRoot, "XAML Failed to Load");
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// Initialize Visual Tree
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await SetTestContentAsync(treeRoot);
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// Main Test
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var textBlock = treeRoot.FindDescendant<TextBlock>(searchType);
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Assert.IsNotNull(textBlock, "Expected to find something.");
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Assert.IsInstanceOfType(textBlock, typeof(TextBlock), "Didn't find expected typed element.");
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});
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}
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[TestCategory("VisualTree")]
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[TestMethod]
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public async Task Test_VisualTree_FindDescendant_NotFound()
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});
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}
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[TestCategory("VisualTree")]
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[TestMethod]
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[DataRow(SearchType.DepthFirst)]
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[DataRow(SearchType.BreadthFirst)]
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public async Task Test_VisualTree_FindDescendants_Exists(SearchType searchType)
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{
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await App.DispatcherQueue.EnqueueAsync(async () =>
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{
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var treeRoot = XamlReader.Load(@"<Page
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xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
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xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""> <!-- Starting Point -->
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<Grid>
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<Grid>
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<Border/>
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<TextBlock x:Name=""One""/> <!-- Target -->
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<StackPanel>
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<TextBox/> <!-- Hidden Target -->
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<TextBlock x:Name=""Two""/> <!-- Target -->
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</StackPanel>
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</Grid>
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<TextBlock x:Name=""Three""/> <!-- Target -->
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</Grid>
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</Page>") as Page;
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// Test Setup
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Assert.IsNotNull(treeRoot, "XAML Failed to Load");
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// Initialize Visual Tree
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await SetTestContentAsync(treeRoot);
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// Main Test
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var textBlocks = treeRoot.FindDescendants(searchType).OfType<TextBlock>();
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Assert.IsNotNull(textBlocks, "Expected to find something.");
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var array = textBlocks.ToArray();
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Assert.AreEqual(4, array.Length, "Expected to find 4 TextBlock elements.");
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// I don't think we want to guarantee order here, so just care that we can find each one.
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Assert.IsTrue(array.Any((tb) => tb.Name == "One"), "Couldn't find TextBlock 'One'");
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Assert.IsTrue(array.Any((tb) => tb.Name == "Two"), "Couldn't find TextBlock 'Two'");
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Assert.IsTrue(array.Any((tb) => tb.Name == "Three"), "Couldn't find TextBlock 'Three'");
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// TextBox has one in its template!
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Assert.IsTrue(array.Any((tb) => tb.Name == "PlaceholderTextContentPresenter"), "Couldn't find hidden TextBlock from TextBox.");
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});
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}
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[TestCategory("VisualTree")]
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[TestMethod]
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public async Task Test_VisualTree_FindDescendants_NotFound()
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});
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}
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[TestCategory("VisualTree")]
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[TestMethod]
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public async Task Test_VisualTree_IsAscendantOrDescendantOf()
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{
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await App.DispatcherQueue.EnqueueAsync(async () =>
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{
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var treeRoot = XamlReader.Load(@"<Page
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xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation""
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xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""> <!-- Starting Point -->
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<Grid x:Name=""RootGrid"">
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<Grid>
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<Border x:Name=""NestedBorder""/>
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<StackPanel>
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<TextBox/>
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<TextBlock x:Name=""TargetElement""/> <!-- Target -->
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</StackPanel>
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</Grid>
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</Grid>
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</Page>") as Page;
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// Test Setup
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Assert.IsNotNull(treeRoot, "XAML Failed to Load");
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// Initialize Visual Tree
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await SetTestContentAsync(treeRoot);
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// Get the root and target elements
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var rootGrid = treeRoot.FindDescendant("RootGrid");
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var nestedBorder = treeRoot.FindDescendant("NestedBorder");
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var textBlock = treeRoot.FindDescendant("TargetElement");
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Assert.IsTrue(rootGrid.IsAscendantOf(nestedBorder));
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Assert.IsTrue(rootGrid.IsAscendantOf(textBlock));
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Assert.IsFalse(rootGrid.IsDescendantOf(nestedBorder));
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Assert.IsFalse(rootGrid.IsDescendantOf(textBlock));
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Assert.IsTrue(nestedBorder.IsDescendantOf(rootGrid));
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Assert.IsFalse(nestedBorder.IsDescendantOf(textBlock));
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Assert.IsFalse(nestedBorder.IsAscendantOf(rootGrid));
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Assert.IsFalse(nestedBorder.IsAscendantOf(textBlock));
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Assert.IsTrue(textBlock.IsDescendantOf(rootGrid));
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Assert.IsFalse(textBlock.IsDescendantOf(nestedBorder));
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Assert.IsFalse(textBlock.IsAscendantOf(rootGrid));
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Assert.IsFalse(textBlock.IsAscendantOf(nestedBorder));
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});
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}
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// TODO: Add another Ascendants test where we have something like a ListView which creates a container.
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}
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}

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