public void AddDescendent()
{
FileSystemDirectory subdir = this.root.OfType <FileSystemDirectory>().First();
FileSystemFile newLeaf = FileSystemFile.Create("added.txt");
FileSystemDirectory updatedRoot = this.root.AddDescendent(newLeaf, subdir);
Assert.Equal(this.root.Identity, updatedRoot.Identity);
FileSystemDirectory updatedSubdir = updatedRoot.OfType <FileSystemDirectory>().First();
Assert.True(updatedSubdir.Contains(newLeaf));
}
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.False(updatedSubdir.Contains(fileUnderSubdir));
}
public void AddDescendentWithLookupTableFixup()
{
var root = this.GetRootWithLookupTable();
FileSystemDirectory subdir = root.OfType <FileSystemDirectory>().First();
FileSystemFile newLeaf = FileSystemFile.Create("added.txt");
FileSystemDirectory updatedRoot = root.AddDescendent(newLeaf, subdir);
Assert.Equal(root.Identity, updatedRoot.Identity);
FileSystemDirectory updatedSubdir = updatedRoot.OfType <FileSystemDirectory>().First();
Assert.True(updatedSubdir.Contains(newLeaf));
}