Tests for IStorageProvider FileExists() and FolderExists()

--HG--
branch : 1.x
extra : rebase_source : aa49eb8dcb103d8ebd1326197062c81df2b11f44

src/Orchard/FileSystems/Media/FileSystemStorageProvider.cs

@@ -64,6 +64,15 @@ namespace Orchard.FileSystems.Media {
 
         #region Implementation of IStorageProvider
 
+        /// <summary>
+        /// Checks if the given file exists within the storage provider.
+        /// </summary>
+        /// <param name="path">The relative path within the storage provider.</param>
+        /// <returns>True if the file exists; False otherwise.</returns>
+        public bool FileExists(string path) {
+            return new FileInfo(MapStorage(path)).Exists;
+        }
+
         /// <summary>
         /// Retrieves the public URL for a given file within the storage provider.
         /// </summary>
@@ -106,6 +115,15 @@ namespace Orchard.FileSystems.Media {
                 .ToList();
         }
 
+        /// <summary>
+        /// Checks if the given folder exists within the storage provider.
+        /// </summary>
+        /// <param name="path">The relative path within the storage provider.</param>
+        /// <returns>True if the folder exists; False otherwise.</returns>
+        public bool FolderExists(string path) {
+            return new DirectoryInfo(MapStorage(path)).Exists;
+        }
+
         /// <summary>
         /// Lists the folders within a storage provider's path.
         /// </summary>