fix option setting

index.js

@@ -22,6 +22,9 @@ function gm (source, height, color) {
     return new gm(source, height, color);
   }
 
+  this._options = {};
+  this.options(this.__proto__._options);
+
   this.data = {};
   this._in = [];
   this._out = [];
@@ -54,8 +57,7 @@ function gm (source, height, color) {
 }
 
 var super = gm;
-gm.subClass =
-gm.setOptions = function subClass (options) {
+gm.subClass = function subClass (options) {
   function gm (source, height, color) {
     if (!(this instanceof super)) {
       return new gm(source, height, color);
@@ -66,15 +68,7 @@ gm.setOptions = function subClass (options) {
 
   gm.prototype.__proto__ = super.prototype;
   gm.prototype._options = {};
-
-  var keys = Object.keys(options)
-    , i = keys.length
-    , key
-
-  while (i--) {
-    key = keys[i];
-    gm.prototype._options[key] = options[key];
-  }
+  gm.prototype.options(options);
 
   return gm;
 }

lib/options.js

@@ -3,4 +3,17 @@
 
 module.exports = exports = function (proto) {
   proto._options = {};
+
+  proto.options = function setOptions (options) {
+    var keys = Object.keys(options)
+      , i = keys.length
+      , key
+
+    while (i--) {
+      key = keys[i];
+      this._options[key] = options[key];
+    }
+
+    return this;
+  }
 }

test/options.js

@@ -0,0 +1,25 @@
+
+// gm - Copyright Aaron Heckmann <aaron.heckmann+github@gmail.com> (MIT Licensed)
+
+
+var assert = require('assert')
+
+module.exports = function (_, dir, finish, gm) {
+
+  var sub = gm.subClass({ subclassed: true });
+  var s = sub('test').options({ setWithMethod: 2 });
+  var g = gm('test').options({ hellowwww: 'there' });
+
+  assert.equal(2, s._options.setWithMethod);
+  assert.equal(true, s._options.subclassed);
+  assert.equal('there', g._options.hellowwww);
+  assert.equal(undefined, g._options.setWithMethod);
+  assert.equal(undefined, s._options.hellowwww);
+  assert.equal(undefined, g._options.subclassed);
+
+  var s2 = sub('another');
+  assert.equal(true, s2._options.subclassed);
+  assert.equal(undefined, s2._options.setWithMethod);
+
+  finish();
+}