started spec tests and exposed to FileSystem prototype

src/fs.js

@@ -2076,7 +2076,32 @@ define(function(require) {
       }
     );
   };
-
+  FileSystem.prototype.setxattr = function (path, name, value, flag, callback) {
+    callback = maybeCallback(arguments[arguments.length - 1]);
+    var fs = this;
+    var error = fs.queueOrRun(
+      function () {
+        var context = fs.provider.getReadWriteContext();
+        _setxattr(context, path, name, value, flag, callback);
+      }
+    );
+    if (error) {
+      callback(error);
+    }
+  };
+  FileSystem.prototype.getxattr = function (path, name, callback) {
+    callback = maybeCallback(callback);
+    var fs = this;
+    var error = fs.queueOrRun(
+      function () {
+        var context = fs.provider.getReadWriteContext();
+        _getxattr(context, path, name, callback);
+      }
+    );
+    if (error) {
+      callback(error);
+    }
+  };
   return FileSystem;
 
 });

tests/spec/fs.xattr.spec.js

@@ -0,0 +1,21 @@
+define(["IDBFS"], function(IDBFS) {
+
+  describe('fs.utimes', function() {
+    beforeEach(function() {
+      this.db_name = mk_db_name();
+      this.fs = new IDBFS.FileSystem({
+        name: this.db_name,
+        flags: 'FORMAT'
+      });
+    });
+
+    afterEach(function() {
+      indexedDB.deleteDatabase(this.db_name);
+      delete this.fs;
+    });
+  });
+
+  it('should be a function', function () {
+    expect(typeof this.setxattr).toEqual('function');
+  });
+}