ILSpy/ILSpy.Tests/AppEnv/CompositionErrorsTests.cs

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using System;

using AwesomeAssertions;

using ICSharpCode.Decompiler;

using ILSpy.AppEnv;

using NUnit.Framework;

namespace ICSharpCode.ILSpy.Tests.AppEnv;

/// <summary>
/// Composition errors are collected non-fatally and can be rendered to an <see cref="ITextOutput"/>
/// for display to the user (the source label and the exception text both appear).
/// </summary>
[TestFixture]
public class CompositionErrorsTests
{
	// The sink is a process-global static. Leaving entries behind would make every later test that
	// boots MainWindow pop a "Composition Errors" tab, so clear it after each test here.
	[TearDown]
	public void TearDown() => CompositionErrors.Clear();

	[Test]
	public void Report_Collects_The_Error_And_WriteTo_Renders_It()
	{
		var marker = "Plugin 'Marker_" + Guid.NewGuid().ToString("N") + "'";
		CompositionErrors.Report(marker, new InvalidOperationException("boom-message"));

		CompositionErrors.Any.Should().BeTrue();

		var output = new PlainTextOutput();
		CompositionErrors.WriteTo(output);
		var text = output.ToString();

		text.Should().Contain(marker, "the failing part's label is shown");
		text.Should().Contain("boom-message", "the exception detail is shown");
	}
}