mirror of
https://github.com/AtomUI/AtomUI.git
synced 2026-10-18 06:21:52 +08:00
chinboy
363 lines
13 KiB
C#
363 lines
13 KiB
C#
using Avalonia;
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using Avalonia.Controls;
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using Avalonia.Controls.Presenters;
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using Avalonia.Media;
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using Avalonia.VisualTree;
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using Shouldly;
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using Xunit;
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namespace AtomUI.Controls.Tests.ImageLoading;
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public class AsyncImageTests
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{
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static AsyncImageTests()
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{
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AvaloniaTestApp.EnsureInitialized();
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}
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[Fact]
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public void No_Source_Is_Idle_And_Explicit_Zero_Size_Is_A_Typed_Failure()
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{
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var borrowed = new TestBorrowedImage();
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var image = new AsyncImage
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{
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Width = 32,
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Height = 32,
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DecodeMode = ImageDecodeMode.Explicit,
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Source = new BorrowedImageSource(borrowed)
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};
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using var host = new ImageControlTestHost(image);
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ImageControlTestHost.WaitUntil(() => image.IsFailed, "invalid explicit decode state");
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image.LoadError.ShouldNotBeNull().Code.ShouldBe(ImageLoadErrorCode.InvalidSource);
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image.Classes.ShouldContain(":failed");
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image.DecodePixelWidth = 16;
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ImageControlTestHost.WaitUntil(() => image.IsLoaded, "explicit image load");
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image.LoadedImage.ShouldBeSameAs(borrowed);
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image.Source = null;
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image.LoadState.ShouldBe(ImageLoadState.Idle);
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image.LoadError.ShouldBeNull();
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image.LoadedImage.ShouldBeNull();
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}
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[Fact]
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public void Borrowed_Image_Transitions_To_Loaded_And_Is_Not_Disposed()
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{
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var borrowed = new TestBorrowedImage();
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ImageOpenedEventArgs? opened = null;
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var image = new AsyncImage
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{
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Width = 32,
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Height = 32,
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Source = new BorrowedImageSource(borrowed)
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};
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image.ImageOpened += (_, args) => opened = args;
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using (var host = new ImageControlTestHost(image))
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{
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ImageControlTestHost.WaitUntil(() => image.IsLoaded, "borrowed image load");
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image.LoadState.ShouldBe(ImageLoadState.Loaded);
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image.IsLoading.ShouldBeFalse();
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image.IsFailed.ShouldBeFalse();
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image.LoadedImage.ShouldBeSameAs(borrowed);
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image.Classes.ShouldContain(":loaded");
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image.Classes.ShouldContain(":has-image");
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opened.ShouldNotBeNull().IsFallback.ShouldBeFalse();
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var presenter = image.GetVisualDescendants()
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.OfType<Image>()
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.Single(control => control.Name == "PART_ImagePresenter");
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presenter.IsVisible.ShouldBeTrue();
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presenter.Source.ShouldBeSameAs(borrowed);
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}
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borrowed.DisposeCount.ShouldBe(0);
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}
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[Fact]
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public void ImageOpened_Observer_Failure_Does_Not_Break_Load_State_Or_Stop_Other_Observers()
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{
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var observed = 0;
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var image = new AsyncImage
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{
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Width = 32,
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Height = 32,
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Source = new BorrowedImageSource(new TestBorrowedImage())
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};
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image.ImageOpened += (_, _) => throw new InvalidOperationException("observer failed");
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image.ImageOpened += (_, _) => Interlocked.Increment(ref observed);
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using var host = new ImageControlTestHost(image);
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ImageControlTestHost.WaitUntil(() => image.IsLoaded, "image opened observer isolation");
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observed.ShouldBe(1);
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image.LoadError.ShouldBeNull();
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}
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[Fact]
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public void Failed_Primary_Uses_Fallback_Within_The_Same_Generation()
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{
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var fallback = new TestBorrowedImage();
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ImageOpenedEventArgs? opened = null;
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var image = new AsyncImage
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{
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Width = 32,
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Height = 32,
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Source = new BytesImageSource(new byte[] { 1 }, "invalid"),
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FallbackSource = new BorrowedImageSource(fallback)
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};
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image.ImageOpened += (_, args) => opened = args;
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using var host = new ImageControlTestHost(image);
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ImageControlTestHost.WaitUntil(() => image.IsLoaded, "fallback image load");
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image.LoadedImage.ShouldBeSameAs(fallback);
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image.Classes.ShouldContain(":fallback");
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opened.ShouldNotBeNull().IsFallback.ShouldBeTrue();
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opened.Source.ShouldBeSameAs(image.FallbackSource);
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}
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[Fact]
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public void Terminal_Failure_Shows_Error_Content_And_Raises_Event()
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{
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ImageFailedEventArgs? failed = null;
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var image = new AsyncImage
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{
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Width = 32,
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Height = 32,
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Source = new BytesImageSource(new byte[] { 1 }, "invalid"),
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ErrorContent = "Unable to load"
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};
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image.ImageFailed += (_, args) => failed = args;
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using var host = new ImageControlTestHost(image);
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ImageControlTestHost.WaitUntil(() => image.IsFailed, "image failure");
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image.LoadError.ShouldNotBeNull().Exception.ShouldBeNull();
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image.LoadError.ShouldNotBeNull().Code.ShouldBe(ImageLoadErrorCode.UnsupportedFormat);
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failed.ShouldNotBeNull().Error.ShouldBeSameAs(image.LoadError);
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image.Classes.ShouldContain(":failed");
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var presenter = image.GetVisualDescendants()
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.OfType<ContentPresenter>()
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.Single(control => control.Name == "PART_ErrorPresenter");
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presenter.IsVisible.ShouldBeTrue();
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presenter.Content.ShouldBe("Unable to load");
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}
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[Fact]
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public void Source_Replacement_Does_Not_Commit_Stale_Result()
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{
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var firstStarted = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
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var releaseFirst = new TaskCompletionSource(TaskCreationOptions.RunContinuationsAsynchronously);
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var first = new StreamImageSource(
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async _ =>
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{
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firstStarted.TrySetResult();
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await releaseFirst.Task;
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return new MemoryStream(ImageControlTestHost.CreatePng(16, 16));
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},
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"first",
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"v1");
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var secondImage = new TestBorrowedImage();
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var second = new BorrowedImageSource(secondImage);
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var image = new AsyncImage { Width = 32, Height = 32, Source = first };
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using var host = new ImageControlTestHost(image);
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ImageControlTestHost.WaitUntil(() => firstStarted.Task.IsCompleted, "first request start");
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image.Source = second;
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ImageControlTestHost.WaitUntil(
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() => image.IsLoaded && ReferenceEquals(image.LoadedImage, secondImage),
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"second image commit");
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releaseFirst.TrySetResult();
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Avalonia.Threading.Dispatcher.UIThread.RunJobs();
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image.Source.ShouldBeSameAs(second);
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image.LoadedImage.ShouldBeSameAs(secondImage);
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image.LoadState.ShouldBe(ImageLoadState.Loaded);
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}
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[Fact]
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public void Reload_Bypasses_Cache_And_Starts_A_New_Read()
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{
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var bytes = ImageControlTestHost.CreatePng(32, 32);
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var reads = 0;
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var source = new StreamImageSource(
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_ =>
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{
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Interlocked.Increment(ref reads);
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return ValueTask.FromResult<Stream>(new MemoryStream(bytes));
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},
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"reload",
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"v1");
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var image = new AsyncImage { Width = 32, Height = 32, Source = source };
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using var host = new ImageControlTestHost(image);
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ImageControlTestHost.WaitUntil(
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() => image.LoadState is ImageLoadState.Loaded or ImageLoadState.Failed,
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"initial image terminal state");
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image.LoadError.ShouldBeNull();
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reads.ShouldBe(1);
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image.Reload();
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ImageControlTestHost.WaitUntil(() => image.IsLoaded && reads == 2, "reloaded image");
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reads.ShouldBe(2);
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}
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[Fact]
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public void Detach_Releases_State_And_Reattach_Loads_Current_Source_Again()
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{
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var borrowed = new TestBorrowedImage();
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var image = new AsyncImage
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{
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Width = 32,
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Height = 32,
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Source = new BorrowedImageSource(borrowed)
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};
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using var host = new ImageControlTestHost(image);
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ImageControlTestHost.WaitUntil(() => image.IsLoaded, "initial attach load");
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host.Detach();
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image.LoadState.ShouldBe(ImageLoadState.Idle);
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image.LoadedImage.ShouldBeNull();
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host.Attach(image);
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ImageControlTestHost.WaitUntil(() => image.IsLoaded, "reattach load");
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image.LoadedImage.ShouldBeSameAs(borrowed);
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borrowed.DisposeCount.ShouldBe(0);
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}
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[Fact]
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public void Auto_Decode_Uses_Sixteen_Physical_Pixel_Buckets()
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{
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var bytes = ImageControlTestHost.CreatePng(64, 64);
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ImageOpenedEventArgs? opened = null;
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var image = new AsyncImage
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{
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Width = 17,
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Height = 17,
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Source = new BytesImageSource(bytes, "bucket")
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};
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image.ImageOpened += (_, args) => opened = args;
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using var host = new ImageControlTestHost(image);
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ImageControlTestHost.WaitUntil(
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() => image.LoadState is ImageLoadState.Loaded or ImageLoadState.Failed,
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"bucketed image terminal state");
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image.LoadError.ShouldBeNull();
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opened.ShouldNotBeNull().PixelWidth.ShouldBe(32);
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opened.PixelHeight.ShouldBe(32);
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}
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[Fact]
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public void Auto_Decode_Does_Not_Use_Content_Derived_Height_When_Height_Was_Unconstrained()
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{
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var image = new AsyncImage
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{
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Width = 168.5,
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Source = new BorrowedImageSource(new TestBorrowedImage(523, 349))
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};
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image.Measure(new Size(168.5, double.PositiveInfinity));
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image.Arrange(new Rect(0, 0, 168.5, 112));
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var host = (IImageLoadControllerHost)image;
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host.GetDecodePixelSize().ShouldBe((176, 0));
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}
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[Fact]
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public void Asset_Svg_Decoded_Off_Thread_Can_Be_Measured_On_The_Ui_Thread()
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{
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var image = new AsyncImage
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{
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Width = 48,
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Height = 32,
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Source = new AssetImageSource(
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new Uri("avares://AtomUI.Controls.Tests/Assets/ImageLoading/Test.svg"))
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};
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using var host = new ImageControlTestHost(image, width: 48, height: 32);
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ImageControlTestHost.WaitUntil(
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() => image.LoadState is ImageLoadState.Loaded or ImageLoadState.Failed,
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"SVG image terminal state");
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image.LoadError.ShouldBeNull();
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image.LoadedImage.ShouldNotBeNull().Size.ShouldBe(new Size(48, 32));
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Should.NotThrow(() => image.Measure(new Size(48, 32)));
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}
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[Fact]
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public void Asset_Svg_Can_Be_Released_By_Background_Cache_Clear()
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{
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var loader = Application.Current.ShouldNotBeNull().GetImageLoader();
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var source = new AssetImageSource(
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new Uri("avares://AtomUI.Controls.Tests/Assets/ImageLoading/Test.svg"));
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ImageLoadResult? result = null;
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Exception? loadException = null;
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var loadTask = Task.Run(async () =>
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{
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try
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{
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result = await loader.LoadAsync(
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new ImageLoadRequest(source),
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TestContext.Current.CancellationToken);
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}
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catch (Exception exception)
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{
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loadException = exception;
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}
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}, TestContext.Current.CancellationToken);
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ImageControlTestHost.WaitUntil(() => loadTask.IsCompleted, "SVG loader result");
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loadException.ShouldBeNull();
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var loadedResult = result.ShouldNotBeNull();
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loadedResult.IsSuccess.ShouldBeTrue();
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Exception? releaseException = null;
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var releaseTask = Task.Run(async () =>
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{
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try
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{
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loadedResult.Dispose();
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await loader.ClearCacheAsync(
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new ImageCacheClearRequest(),
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TestContext.Current.CancellationToken);
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}
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catch (Exception exception)
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{
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releaseException = exception;
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}
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}, TestContext.Current.CancellationToken);
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ImageControlTestHost.WaitUntil(() => releaseTask.IsCompleted, "background SVG release");
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releaseException.ShouldBeNull();
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Avalonia.Threading.Dispatcher.UIThread.RunJobs();
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}
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private sealed class TestBorrowedImage : IImage, IDisposable
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{
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private int _disposeCount;
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private readonly Size _size;
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internal TestBorrowedImage(double width = 24, double height = 24)
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{
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_size = new Size(width, height);
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}
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public Size Size => _size;
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internal int DisposeCount => Volatile.Read(ref _disposeCount);
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public void Draw(DrawingContext context, Rect sourceRect, Rect destRect)
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{
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}
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public void Dispose()
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{
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Interlocked.Increment(ref _disposeCount);
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}
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}
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}
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