Static files: Fix tree to only provide items from expected folders (closes #20962) (#21001)

* Applies checks for root folders to static file tree service.

* Add integration tests.

* Fix ancestor test.

* Amends from code review.

* Integration test compatibility suppressions.

* Reverted breaking change in test base class.

tests/Umbraco.Tests.Integration/ManagementApi/Services/Trees/PhysicalFileSystemTreeServiceTests.cs

@@ -0,0 +1,95 @@
+using System.IO;
+using Microsoft.Extensions.Logging;
+using NUnit.Framework;
+using Umbraco.Cms.Api.Management.Services.FileSystem;
+using Umbraco.Cms.Api.Management.ViewModels.Tree;
+using Umbraco.Cms.Core.IO;
+
+namespace Umbraco.Cms.Tests.Integration.ManagementApi.Services.Trees;
+
+public class PhysicalFileSystemTreeServiceTests : FileSystemTreeServiceTestsBase
+{
+    protected override string FileExtension { get; set; } = string.Empty;
+
+    protected override string FileSystemPath => "/";
+
+    protected override void CreateFiles()
+    {
+        var paths = new[]
+        {
+            Path.Join("App_Plugins", "test-extension", "test.js"),
+            Path.Join("wwwroot", "css", "test.css"),
+            Path.Join("wwwroot", "css", "test2.css"),
+            Path.Join("wwwroot", "css", "test3.css"),
+            Path.Join("wwwroot", "css", "test4.css"),
+            Path.Join("Program.cs"),
+        };
+        foreach (var path in paths)
+        {
+            var stream = CreateStream();
+            TestFileSystem.AddFile(path, stream);
+        }
+    }
+
+    [Test]
+    public void Can_Get_Siblings()
+    {
+        var service = CreateService();
+
+        FileSystemTreeItemPresentationModel[] treeModels = service.GetSiblingsViewModels("wwwroot/css/test2.css", 1, 1, out long before, out var after);
+
+        Assert.AreEqual(3, treeModels.Length);
+        Assert.AreEqual(treeModels[0].Name, "test.css");
+        Assert.AreEqual(treeModels[1].Name, "test2.css");
+        Assert.AreEqual(treeModels[2].Name, "test3.css");
+        Assert.AreEqual(before, 0);
+        Assert.AreEqual(after, 1);
+    }
+
+    [Test]
+    public void Can_Get_Ancestors()
+    {
+        var service = CreateService();
+
+        FileSystemTreeItemPresentationModel[] treeModels = service.GetAncestorModels(Path.Join("wwwroot", "css", "test.css"), true);
+
+        Assert.IsNotEmpty(treeModels);
+        Assert.AreEqual(treeModels.Length, 3);
+        Assert.AreEqual(treeModels[0].Name, "wwwroot");
+        Assert.AreEqual(treeModels[1].Name, "css");
+        Assert.AreEqual(treeModels[2].Name, "test.css");
+    }
+
+    [Test]
+    public void Can_Get_Root_PathViewModels()
+    {
+        var service = CreateService();
+
+        FileSystemTreeItemPresentationModel[] treeModels = service.GetPathViewModels(string.Empty, 0, int.MaxValue, out var totalItems);
+
+        Assert.IsNotEmpty(treeModels);
+        Assert.AreEqual(totalItems, 2);
+        Assert.AreEqual(treeModels.Length, totalItems);
+        Assert.AreEqual(treeModels[0].Name, "App_Plugins");
+        Assert.AreEqual(treeModels[1].Name, "wwwroot");
+    }
+
+    [Test]
+    public void Can_Get_Child_PathViewModels()
+    {
+        var service = CreateService();
+
+        FileSystemTreeItemPresentationModel[] treeModels = service.GetPathViewModels("App_Plugins/test-extension", 0, int.MaxValue, out var totalItems);
+
+        Assert.IsNotEmpty(treeModels);
+        Assert.AreEqual(totalItems, 1);
+        Assert.AreEqual(treeModels.Length, totalItems);
+        Assert.AreEqual(treeModels[0].Name, "test.js");
+    }
+
+    private PhysicalFileSystemTreeService CreateService()
+    {
+        var physicalFileSystem = new PhysicalFileSystem(IOHelper, HostingEnvironment, LoggerFactory.CreateLogger<PhysicalFileSystem>(), HostingEnvironment.MapPathWebRoot(FileSystemPath), HostingEnvironment.ToAbsolute(FileSystemPath));
+        return new PhysicalFileSystemTreeService(physicalFileSystem);
+    }
+}