Fix a bug in the file-system module for iOS (NSDate is automatically marshalled to JS Date).

apps/tests/file-system-tests.ts

@@ -579,3 +579,16 @@ export function testKnownFolderRemove(done) {
             done(null);
         });
 };
+
+export function test_FSEntity_Properties() {
+    var documents = fs.knownFolders.documents();
+    var file = documents.getFile("Test_File.txt");
+
+    TKUnit.assert(file.extension === ".txt", "FileEntity.extension not working.");
+    TKUnit.assert(file.isLocked === false, "FileEntity.isLocked not working.");
+    TKUnit.assert(file.lastModified instanceof Date, "FileEntity.lastModified not working.");
+    TKUnit.assert(file.name === "Test_File.txt", "FileEntity.name not working.");
+    TKUnit.assert(file.parent === documents, "FileEntity.parent not working.");
+
+    file.remove();
+}

file-system/file-system-access.ios.ts

@@ -18,11 +18,7 @@ export class FileSystemAccess {
         var attributes = fileManager.attributesOfItemAtPathError(path, null);
 
         if (attributes) {
-            var date = attributes.objectForKey(this.keyModificationTime);
+            return attributes.objectForKey(this.keyModificationTime);
-            var interval = date.timeIntervalSince1970();
-
-            // time interval is in seconds, Date constructor expects milliseconds, hence this multiply by 1000
-            return new Date(interval * 1000);
         } else {
             return new Date();
         }

file-system/file-system.ts

@@ -159,7 +159,8 @@ export class File extends FileSystemEntity {
     }
 
     get isLocked(): boolean {
-        return this[fileLockedProperty];
+        // !! is a boolean conversion/cast, handling undefined as well
+        return !!this[fileLockedProperty];
     }
 
     public readText(encoding?: string): Promise<string> {