ILSpy/ILSpy.Tests/AssemblyTree/AssemblyTreeModelTests.cs

// Copyright (c) 2026 AlphaSierraPapa for the SharpDevelop Team
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using Avalonia.Headless.NUnit;

using AwesomeAssertions;

using ICSharpCode.ILSpyX;

using ILSpy.AppEnv;
using ILSpy.AssemblyTree;

using NUnit.Framework;

namespace ICSharpCode.ILSpy.Tests.AssemblyTree;

// AssemblyTreeModel is the MEF-shared root of the assembly tree. Initialize() loads
// (or creates) the default assembly list from settings, optionally bootstraps it with
// the three .NET runtime assemblies, and wires Root to an AssemblyListTreeNode. If
// either AssemblyList or Root stays null, the entire pane below is blank — which is
// hard to debug from a UI snapshot, so we catch it at the model layer here.
[TestFixture]
public class AssemblyTreeModelTests
{
	[AvaloniaTest]
	public void Initialize_populates_AssemblyList_and_Root()
	{
		var model = AppComposition.Current.GetExport<AssemblyTreeModel>();
		model.Should().NotBeNull("AssemblyTreeModel is [Export][Shared] in ILSpy.AssemblyTree.");

		model.Initialize();

		model.AssemblyList.Should().NotBeNull("Initialize loads or creates the default AssemblyList.");
		// Cast through object so the generic AwesomeAssertions Should() resolves, not the
		// TreeNodeAssertionsExtensions.Should(SharpTreeNode) shadow that landed in this commit
		// (its TreeNodeAssertions surface doesn't expose NotBeNull).
		((object?)model.Root).Should().NotBeNull("Initialize wires Root to an AssemblyListTreeNode of the loaded list.");
	}

	[AvaloniaTest]
	public void Initialize_populates_AssemblyLists_and_selects_the_default()
	{
		var model = AppComposition.Current.GetExport<AssemblyTreeModel>();
		model.Initialize();

		model.AssemblyLists.Should().NotBeEmpty(
			"Initialize mirrors AssemblyListManager.AssemblyLists into the toolbar combo's source.");
		model.ActiveListName.Should().Be(AssemblyListManager.DefaultListName,
			"Initialize selects the (Default) list so the tree has something to render at startup.");
	}
}