diff --git a/SwiftShell/Files.swift b/SwiftShell/Files.swift
index 8bdb9b6..9c876b2 100644
--- a/SwiftShell/Files.swift
+++ b/SwiftShell/Files.swift
@@ -10,3 +10,7 @@ import Foundation
 /** The default NSFileManager */
 public let Files = NSFileManager.defaultManager()
 
+/** Append file or directory url to directory url */
+public func / (leftpath: NSURL, rightpath: String) -> NSURL {
+	return leftpath.URLByAppendingPathComponent(rightpath)
+}
diff --git a/SwiftShellTests/Files_Tests.swift b/SwiftShellTests/Files_Tests.swift
index 431704f..b6a8b37 100644
--- a/SwiftShellTests/Files_Tests.swift
+++ b/SwiftShellTests/Files_Tests.swift
@@ -9,6 +9,11 @@
 import SwiftShell
 import XCTest
 
-class Files_Tests: XCTestCase {
+class UrlAppendationOperator: XCTestCase {
 
+	func testUrlSlashString () {
+		XCTAssertEqual( NSURL(fileURLWithPath: "dir") / "file.txt", NSURL(fileURLWithPath: "dir/file.txt"))
+		XCTAssertEqual( NSURL(fileURLWithPath: "dir/") / "/file.txt", NSURL(fileURLWithPath: "dir/file.txt"))
+		XCTAssertEqual( NSURL(string: "dir")! / "file.txt", NSURL(string: "dir/file.txt"))
+	}
 }