60 lines
2.1 KiB
C#
60 lines
2.1 KiB
C#
// Copyright (c) .NET Foundation. All rights reserved.
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// Licensed under the Apache License, Version 2.0. See License.txt in the project root for license information.
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Threading.Tasks;
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using Microsoft.AspNetCore.Blazor.Components;
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using Microsoft.AspNetCore.Blazor.Rendering;
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namespace Microsoft.AspNetCore.Blazor.Test.Helpers
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{
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public class TestRenderer : Renderer
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{
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public TestRenderer(): this(new TestServiceProvider())
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{
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}
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public TestRenderer(IServiceProvider serviceProvider) : base(serviceProvider)
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{
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}
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public Action<RenderBatch> OnUpdateDisplay { get; set; }
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public List<CapturedBatch> Batches { get; }
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= new List<CapturedBatch>();
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public new int AssignRootComponentId(IComponent component)
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=> base.AssignRootComponentId(component);
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public new void DispatchEvent(int componentId, int eventHandlerId, UIEventArgs args)
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=> base.DispatchEvent(componentId, eventHandlerId, args);
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public T InstantiateComponent<T>() where T : IComponent
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=> (T)InstantiateComponent(typeof(T));
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protected override Task UpdateDisplayAsync(in RenderBatch renderBatch)
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{
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OnUpdateDisplay?.Invoke(renderBatch);
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var capturedBatch = new CapturedBatch();
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Batches.Add(capturedBatch);
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for (var i = 0; i < renderBatch.UpdatedComponents.Count; i++)
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{
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ref var renderTreeDiff = ref renderBatch.UpdatedComponents.Array[i];
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capturedBatch.AddDiff(renderTreeDiff);
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}
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// Clone other data, as underlying storage will get reused by later batches
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capturedBatch.ReferenceFrames = renderBatch.ReferenceFrames.ToArray();
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capturedBatch.DisposedComponentIDs = renderBatch.DisposedComponentIDs.ToList();
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// This renderer updates the UI synchronously, like the WebAssembly one.
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// To test async UI updates, subclass TestRenderer and override UpdateDisplayAsync.
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return Task.CompletedTask;
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}
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}
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}
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