feat(launcher): Campaign LA add Avalonia desktop shell

tests/AcDream.Launcher.Tests/LauncherProjectBoundaryTests.cs

@@ -0,0 +1,77 @@
+using System.Xml.Linq;
+
+namespace AcDream.Launcher.Tests;
+
+public sealed class LauncherProjectBoundaryTests
+{
+    private static readonly string[] ExpectedAvaloniaPackages =
+    [
+        "Avalonia",
+        "Avalonia.Desktop",
+        "Avalonia.Themes.Fluent",
+    ];
+
+    [Fact]
+    public void LauncherReferencesOnlyLauncherCoreAndPinsOneAvaloniaVersion()
+    {
+        string root = FindRepositoryRoot();
+        string projectPath = Path.Combine(
+            root,
+            "src",
+            "AcDream.Launcher",
+            "AcDream.Launcher.csproj");
+        XDocument project = XDocument.Load(projectPath);
+
+        string projectReference = Assert.Single(
+            project.Descendants("ProjectReference")
+                .Select(element => element.Attribute("Include")?.Value ?? string.Empty));
+        Assert.EndsWith(
+            "AcDream.Launcher.Core\\AcDream.Launcher.Core.csproj",
+            projectReference,
+            StringComparison.Ordinal);
+
+        (string Name, string Version)[] packages = project
+            .Descendants("PackageReference")
+            .Select(element => (
+                element.Attribute("Include")?.Value ?? string.Empty,
+                element.Attribute("Version")?.Value ?? string.Empty))
+            .OrderBy(package => package.Item1, StringComparer.Ordinal)
+            .ToArray();
+
+        Assert.Equal(ExpectedAvaloniaPackages, packages.Select(package => package.Name));
+        Assert.All(packages, package => Assert.Equal("12.1.1", package.Version));
+    }
+
+    [Fact]
+    public void LauncherAndItsTestsAreSolutionMembers()
+    {
+        string root = FindRepositoryRoot();
+        XDocument solution = XDocument.Load(Path.Combine(root, "AcDream.slnx"));
+        string[] paths = solution.Descendants("Project")
+            .Select(element => (element.Attribute("Path")?.Value ?? string.Empty)
+                .Replace('\\', '/'))
+            .ToArray();
+
+        Assert.Contains("src/AcDream.Launcher/AcDream.Launcher.csproj", paths);
+        Assert.Contains("tests/AcDream.Launcher.Tests/AcDream.Launcher.Tests.csproj", paths);
+    }
+
+    private static string FindRepositoryRoot()
+    {
+        foreach (string start in new[] { AppContext.BaseDirectory, Environment.CurrentDirectory })
+        {
+            DirectoryInfo? directory = new(start);
+            while (directory is not null)
+            {
+                if (File.Exists(Path.Combine(directory.FullName, "AcDream.slnx")))
+                {
+                    return directory.FullName;
+                }
+
+                directory = directory.Parent;
+            }
+        }
+
+        throw new DirectoryNotFoundException("Could not find AcDream.slnx.");
+    }
+}