Path string for unity. This class can't store file and file's expansion. ..and test.

PathString.cs

using UnityEditor;
using UnityEngine;
using System.Collections.Generic;
using System.Text.RegularExpressions;
public class PathString{
[MenuItem("TEST PathString")]
	static void TEST_PathString(){
		string _test_target_path = @"help/ui/a";
		PathString pathString = new PathString(_test_target_path);
		if( pathString.correctlyPath(3) == pathString.fullpath ){
			Debug.Log(string.Format( "OK \n{0}\n{1}",pathString.correctlyPath(3),pathString.fullpath));
		}else{
			Debug.Log(string.Format( "OUT \n{0}\n{1}",pathString.correctlyPath(3),pathString.fullpath));
		}

		_test_target_path = @"help/ui/a";
		if( pathString.correctlyPath(3) == _test_target_path ){
			Debug.Log(string.Format( "OK! \n{0}\n{1}",pathString.correctlyPath(3),_test_target_path));
		}else{
			Debug.Log(string.Format( "OUT! \n{0}\n{1}",pathString.correctlyPath(3),_test_target_path));
		}

		_test_target_path = @"help/ui/";
		if( pathString.correctlyPath(2) == _test_target_path ){
			Debug.Log(string.Format( "OK!! \n{0}\n{1}",pathString.correctlyPath(2),_test_target_path));
		}else{
			Debug.Log(string.Format( "OUT!! \n{0}\n{1}",pathString.correctlyPath(2),_test_target_path));
		}

		_test_target_path = @"help/";
		if( pathString.correctlyPath(1) == _test_target_path ){
			Debug.Log(string.Format( "OK!!! \n{0}\n{1}",pathString.correctlyPath(1),_test_target_path));
		}else{
			Debug.Log(string.Format( "OUT!!! \n{0}\n{1}",pathString.correctlyPath(1),_test_target_path));
		}
	}

	Public class PathString{
		char SPLIT = ('/');
		private string[] directory;
		public string fullpath{
			get{
				return correctlyPath(directory.Length);
			}
			set{directory = value.Split(SPLIT);}
		}
		/* constructor */
		public PathString(string path){
//			Debug.Log(string.Format("SPLIT:{0}",SPLIT));
			string[] str = path.Split(SPLIT);
//			for(int i = 0;str.Length>i;++i){ Debug.Log(str[i]);	}
			directory = str;
		}
		public string correctlyPath( int correct = 0 ){
				string path = "";
				int i = 0;
				while( i < correct )
				{
					path = path + directory[i];
					++i;
					// if not end dir, add path.
					if( directory.Length != i ) path += @"/";
				}
				return path;
		}
	}
}