ILSpy/ILSpy.Tests/Analyzers/AnalyzerAutoExpandTests.cs

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using System.Threading.Tasks;

using Avalonia.Headless.NUnit;

using AwesomeAssertions;

using ICSharpCode.Decompiler.TypeSystem;

using ICSharpCode.ILSpy.Analyzers;
using ICSharpCode.ILSpy.AppEnv;
using ICSharpCode.ILSpy.TreeNodes;

using NUnit.Framework;

namespace ICSharpCode.ILSpy.Tests.Analyzers;

[TestFixture]
public class AnalyzerAutoExpandTests
{
	[AvaloniaTest]
	public async Task Analyzing_A_New_Entity_Auto_Expands_Its_Node()
	{
		// Invoking Analyze on a member should drop its node into the analyzer tree already expanded,
		// so its analyzers (Used By, Uses, ...) are visible immediately rather than needing a manual
		// expand. Re-analyzing an existing entity returns the same node without forcing it open again.
		var (_, vm) = await TestHarness.BootAsync(3);
		var analyzerVm = AppComposition.Current.GetExport<AnalyzerTreeViewModel>();

		var typeNode = vm.AssemblyTreeModel.FindNode<TypeTreeNode>(
			"System.Linq", "System.Linq", "System.Linq.Enumerable");
		var entity = (ITypeDefinition)typeNode.Member!;

		var analyzed = analyzerVm.Analyze(entity);

		analyzed.IsExpanded.Should().BeTrue(
			"a freshly-analyzed node must auto-expand so its analyzers are visible without a manual expand");
	}
}