public void AddingLocation_AddsOverlappingGraft_WithoutError()
        {
            var builder = new StorageHierarchiesBuilder(new StubFileSystemApi());
            var root    = builder.CreateNode(@"C:\Root", FileSystemCasing.CasePreservingInsensitive);

            builder.AddNamedRoot("Root", root);

            var error = builder.AddLocation(root, "Child", out var child);

            Assert.That(error, Is.Null);
            Assert.That(builder.Errors, Is.Empty);
            Assert.That(child.RootUri, Is.EqualTo(new Uri(root.RootUri, @"Child\")));
        }