fix test

.travis.yml

@@ -16,4 +16,4 @@ deploy:
   keep_history: true
   local_dir: docs
   # on:
-  #   branch: master
+  #   branch: main

src/gameObject.js

@@ -360,6 +360,34 @@ class GameObject {
   set viewY(value) {
     return;
   }
+
+  // ifdef GAMEOBJECT_GROUP
+  get sx() {
+    return this._sx;
+  }
+
+  get sy() {
+    return this._sy;
+  }
+
+  set sx(value) {
+    let diff = value - this._sx;
+    this.children.map(child => {
+      child.sx += diff;
+    });
+
+    this._sx = value;
+  }
+
+  set sy(value) {
+    let diff = value - this._sy;
+    this.children.map(child => {
+      child.sy += diff;
+    });
+
+    this._sy = value;
+  }
+  // @endif
   // @endif
 
   // @ifdef GAMEOBJECT_TTL
@@ -401,7 +429,7 @@ class GameObject {
    * @function addChild
    *
    * @param {GameObject} child - Object to add as a child.
-   * @param {Object} options - Options for adding the child.
+   * @param {Object} [options] - Options for adding the child.
    * @param {Boolean} [options.absolute=false] - If set the true, the x/y position of the child is treated as an absolute position in the world rather than being relative to the x/y position of the parent.
    *
    * @example

test/unit/button.spec.js

@@ -16,7 +16,9 @@ describe('button', () => {
   let button;
   beforeEach(() => {
    button = Button({
-      text: 'Hello'
+      text: {
+        text: 'Hello'
+      }
     });
   });
 
@@ -31,17 +33,20 @@ describe('button', () => {
 
     it('should setup basic properties', () => {
       button = Button({
-        text: 'Hello',
-        font: '32px Arial',
-        width: 100,
-        color: 'black'
+        text: {
+          text: 'Hello',
+          font: '32px Arial',
+          width: 100,
+          color: 'black'
+        }
       });
 
-      expect(button.width).to.equal(100);
-      expect(button.height).to.equal(32);
-      expect(button.font).to.equal('32px Arial');
-      expect(button.text).to.equal('Hello');
-      expect(button.color).to.equal('black');
+      expect(button.textNode).to.exist;
+      expect(button.textNode.width).to.equal(100);
+      expect(button.textNode.height).to.equal(32);
+      expect(button.textNode.font).to.equal('32px Arial');
+      expect(button.textNode.text).to.equal('Hello');
+      expect(button.textNode.color).to.equal('black');
     });
 
     it('should create a DOM node and add it to the page', () => {