public void RemoveDescendent()
{
FileSystemDirectory subdir = this.root.OfType <FileSystemDirectory>().First(d => d.Children.OfType <FileSystemFile>().Any());
FileSystemFile fileUnderSubdir = subdir.Children.OfType <FileSystemFile>().First();
FileSystemDirectory updatedRoot = this.root.RemoveDescendent(fileUnderSubdir);
Assert.Equal(this.root.Identity, updatedRoot.Identity);
FileSystemDirectory updatedSubdir = (FileSystemDirectory)updatedRoot.Single(c => c.Identity == subdir.Identity);
Assert.DoesNotContain(fileUnderSubdir, updatedSubdir);
}
public void RemoveDescendentWithLookupTableFixup()
{
var root = this.GetRootWithLookupTable();
FileSystemDirectory subdir = root.OfType <FileSystemDirectory>().First(d => d.Children.OfType <FileSystemFile>().Any());
FileSystemFile fileUnderSubdir = subdir.Children.OfType <FileSystemFile>().First();
FileSystemDirectory updatedRoot = root.RemoveDescendent(fileUnderSubdir);
Assert.Equal(root.Identity, updatedRoot.Identity);
FileSystemDirectory updatedSubdir = (FileSystemDirectory)updatedRoot.Single(c => c.Identity == subdir.Identity);
Assert.False(updatedSubdir.Contains(fileUnderSubdir));
}
