76 lines
3.1 KiB
C#
76 lines
3.1 KiB
C#
using Bunit;
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using ScadaLink.CentralUI.Components.Shared;
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namespace ScadaLink.CentralUI.Tests.Shared;
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/// <summary>
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/// Regression tests for CentralUI-011. <c>DiffDialog.OpenAsync</c> returns the
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/// <c>TaskCompletionSource</c>'s task, completed only by <c>Close()</c>. If the
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/// user navigated away while the dialog was open, <c>DisposeAsync</c> ran but
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/// never completed the TCS — the awaiting caller was suspended forever and any
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/// cleanup after the await was skipped. The fix completes the TCS in
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/// <c>DisposeAsync</c>.
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/// </summary>
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public class DiffDialogTests : BunitContext
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{
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/// <summary>
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/// DiffDialog applies/removes a body scroll-lock class via JS interop on
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/// open/close. CentralUI-023 narrowed those catch blocks so they no longer
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/// swallow every exception — including bUnit's strict-mode unplanned-call
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/// exception. Tests that exercise open/close must therefore register the
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/// body-class calls so they do not surface as harness exceptions.
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/// </summary>
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private void SetupBodyLockInterop()
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{
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JSInterop.SetupVoid("document.body.classList.add", "modal-open");
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JSInterop.SetupVoid("document.body.classList.remove", "modal-open");
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}
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[Fact]
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public async Task DisposeAsync_WhileOpen_CompletesPendingTask()
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{
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SetupBodyLockInterop();
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var cut = Render<DiffDialog>();
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// Open the dialog; the returned task represents the caller's await.
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// Block-bodied lambda so InvokeAsync sees a void delegate — it must NOT
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// await the dialog's own (deliberately long-lived) task.
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Task<bool> pending = null!;
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await cut.InvokeAsync(
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() => { pending = cut.Instance.ShowAsync("Compare", "before", "after"); });
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Assert.False(pending.IsCompleted, "Dialog task should be pending while open.");
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// Simulate navigating away while the dialog is still open.
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await cut.InvokeAsync(async () => await cut.Instance.DisposeAsync());
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// The awaiter must complete deterministically rather than hang forever.
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var completed = await Task.WhenAny(pending, Task.Delay(TimeSpan.FromSeconds(2)));
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Assert.Same(pending, completed);
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Assert.True(pending.IsCompletedSuccessfully);
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var result = await pending;
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Assert.False(result, "Dismiss-on-dispose should resolve to false (not confirmed).");
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}
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[Fact]
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public async Task Close_CompletesPendingTaskWithTrue()
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{
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SetupBodyLockInterop();
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var cut = Render<DiffDialog>();
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// Block-bodied lambda so InvokeAsync sees a void delegate — it must NOT
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// await the dialog's own (deliberately long-lived) task.
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Task<bool> pending = null!;
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await cut.InvokeAsync(
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() => { pending = cut.Instance.ShowAsync("Compare", "before", "after"); });
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// Closing via the Close button completes the task with true.
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await cut.InvokeAsync(() => cut.Find("button.btn-secondary").Click());
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var completed = await Task.WhenAny(pending, Task.Delay(TimeSpan.FromSeconds(2)));
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Assert.Same(pending, completed);
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var result = await pending;
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Assert.True(result);
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}
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}
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