Create documents directory

Author: timshadel

DVR/Tests/SessionUploadTests.swift

@@ -104,6 +104,12 @@ class SessionUploadTests: XCTestCase {
     func writeDataToFile(data: NSData, fileName: String) -> NSURL {
         let documentsPath = NSSearchPathForDirectoriesInDomains(.DocumentDirectory, .UserDomainMask, true)[0]
         let documentsURL = NSURL(fileURLWithPath: documentsPath, isDirectory: true)
+        
+        do {
+            try NSFileManager.defaultManager().createDirectoryAtURL(documentsURL, withIntermediateDirectories: true, attributes: nil)
+        } catch {
+            XCTFail("Failed to create documents directory \(documentsURL). Error \(error)")
+        }
 
         let url = documentsURL.URLByAppendingPathComponent(fileName + ".tmp")