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Merge pull request #3746 from michael-hawker/tests-visualtree
Setup Unit Test Infrastructure for VisualTree related tests
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UnitTests/UnitTests.UWP/Extensions/Test_LogicalTreeExtensions.cs
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,66 @@ | ||
| // 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. | ||
|
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| using System.Linq; | ||
| using System.Threading.Tasks; | ||
| using Microsoft.Toolkit.Uwp.Extensions; | ||
| using Microsoft.Toolkit.Uwp.UI.Extensions; | ||
| using Microsoft.VisualStudio.TestTools.UnitTesting; | ||
| using Windows.UI.Xaml; | ||
| using Windows.UI.Xaml.Controls; | ||
| using Windows.UI.Xaml.Markup; | ||
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| namespace UnitTests.Extensions | ||
| { | ||
| [TestClass] | ||
| public class Test_LogicalTreeExtensions : VisualUITestBase | ||
| { | ||
| [TestCategory("LogicalTree")] | ||
| [TestMethod] | ||
| public async Task Test_LogicalTree_FindParent_Exists() | ||
| { | ||
| await App.DispatcherQueue.EnqueueAsync(async () => | ||
| { | ||
| var treeRoot = XamlReader.Load(@"<Page | ||
| xmlns=""http://schemas.microsoft.com/winfx/2006/xaml/presentation"" | ||
| xmlns:x=""http://schemas.microsoft.com/winfx/2006/xaml""> | ||
| <Grid> | ||
| <Grid> <!-- Target --> | ||
| <Border/> | ||
| <Border> | ||
| <TextBlock/> <!-- Starting Point --> | ||
| </Border> | ||
| </Grid> | ||
| </Grid> | ||
| </Page>") as Page; | ||
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| // Test Setup | ||
| Assert.IsNotNull(treeRoot, "XAML Failed to Load"); | ||
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| // Initialize Visual Tree | ||
| await SetTestContentAsync(treeRoot); | ||
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| var outerGrid = treeRoot.Content as Grid; | ||
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| Assert.IsNotNull(outerGrid, "Couldn't find Page content."); | ||
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| var targetGrid = outerGrid.Children.FirstOrDefault() as Grid; | ||
| Assert.IsNotNull(targetGrid, "Couldn't find Target Grid"); | ||
| Assert.AreEqual(2, targetGrid.Children.Count, "Grid doesn't have right number of children."); | ||
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| var secondBorder = targetGrid.Children[1] as Border; | ||
| Assert.IsNotNull(secondBorder, "Border not found."); | ||
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| var startingPoint = secondBorder.Child as FrameworkElement; | ||
| Assert.IsNotNull(startingPoint, "Could not find starting element."); | ||
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| // Main Test | ||
| var grid = startingPoint.FindParent<Grid>(); | ||
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| Assert.IsNotNull(grid, "Expected to find Grid"); | ||
| Assert.AreEqual(targetGrid, grid, "Grid didn't match expected."); | ||
| }); | ||
| } | ||
| } | ||
| } |
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| Original file line number | Diff line number | Diff line change |
|---|---|---|
| @@ -0,0 +1,77 @@ | ||
| // 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 Microsoft.Toolkit.Uwp.Extensions; | ||
| using Microsoft.Toolkit.Uwp.UI.Helpers; | ||
| using Microsoft.VisualStudio.TestTools.UnitTesting; | ||
| using System; | ||
| using System.Threading.Tasks; | ||
| using Windows.UI.Xaml; | ||
|
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| namespace UnitTests | ||
| { | ||
| /// <summary> | ||
| /// Base class to be used in API tests which require UI layout or rendering to occur first. | ||
| /// For more E2E scenarios or testing components for user interation, see integration test suite instead. | ||
| /// Use this class when an API needs direct access to test functions of the UI itself in more simplistic scenarios (i.e. visual tree helpers). | ||
| /// </summary> | ||
| public class VisualUITestBase | ||
| { | ||
| /// <summary> | ||
| /// Sets the content of the test app to a simple <see cref="FrameworkElement"/> to load into the visual tree. | ||
| /// Waits for that element to be loaded and rendered before returning. | ||
| /// </summary> | ||
| /// <param name="content">Content to set in test app.</param> | ||
| /// <returns>When UI is loaded.</returns> | ||
| protected Task SetTestContentAsync(FrameworkElement content) | ||
| { | ||
| return App.DispatcherQueue.EnqueueAsync(() => | ||
| { | ||
| var taskCompletionSource = new TaskCompletionSource<bool>(); | ||
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| async void Callback(object sender, RoutedEventArgs args) | ||
| { | ||
| content.Loaded -= Callback; | ||
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| // Wait for first Render pass | ||
| await CompositionTargetHelper.ExecuteAfterCompositionRenderingAsync(() => { }); | ||
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| taskCompletionSource.SetResult(true); | ||
| } | ||
|
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| // Going to wait for our original content to unload | ||
| content.Loaded += Callback; | ||
|
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| // Trigger that now | ||
| try | ||
| { | ||
| App.ContentRoot = content; | ||
| } | ||
| catch (Exception e) | ||
| { | ||
| taskCompletionSource.SetException(e); | ||
| } | ||
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| return taskCompletionSource.Task; | ||
| }); | ||
| } | ||
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| [TestCleanup] | ||
| public async Task Cleanup() | ||
| { | ||
| var taskCompletionSource = new TaskCompletionSource<bool>(); | ||
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| await App.DispatcherQueue.EnqueueAsync(() => | ||
| { | ||
| // Going to wait for our original content to unload | ||
| App.ContentRoot.Unloaded += (_, _) => taskCompletionSource.SetResult(true); | ||
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| // Trigger that now | ||
| App.ContentRoot = null; | ||
| }); | ||
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| await taskCompletionSource.Task; | ||
| } | ||
| } | ||
| } |