Fix teaspoon tests (headless)

Seems that the polyfilled teaspoon Function.prototype.bind support for PhantomJS is not compatible with Ember 1.9. Used a shim from React instead.

See also facebook/react#945

spec/javascripts/spec_helper.coffee

@@ -6,7 +6,9 @@
 #
 # PhantomJS (Teaspoons default driver) doesn't have support for Function.prototype.bind, which has caused confusion.
 # Use this polyfill to avoid the confusion.
-#= require support/bind-poly
+# Had to use the following shim from react to get working with Ember 1.9:
+# https://raw.githubusercontent.com/facebook/react/master/src/test/phantomjs-shims.js
+#= require support/bind-poly-phantomjs
 #
 # Deferring execution
 # If you're using CommonJS, RequireJS or some other asynchronous library you can defer execution. Call

spec/javascripts/support/bind-poly-phantomjs.js

@@ -0,0 +1,37 @@
+// https://raw.githubusercontent.com/facebook/react/master/src/test/phantomjs-shims.js
+
+(function() {
+
+var Ap = Array.prototype;
+var slice = Ap.slice;
+var Fp = Function.prototype;
+
+if (!Fp.bind) {
+  // PhantomJS doesn't support Function.prototype.bind natively, so
+  // polyfill it whenever this module is required.
+  Fp.bind = function(context) {
+    var func = this;
+    var args = slice.call(arguments, 1);
+
+    function bound() {
+      var invokedAsConstructor = func.prototype && (this instanceof func);
+      return func.apply(
+        // Ignore the context parameter when invoking the bound function
+        // as a constructor. Note that this includes not only constructor
+        // invocations using the new keyword but also calls to base class
+        // constructors such as BaseClass.call(this, ...) or super(...).
+        !invokedAsConstructor && context || this,
+        args.concat(slice.call(arguments))
+      );
+    }
+
+    // The bound function must share the .prototype of the unbound
+    // function so that any object created by one constructor will count
+    // as an instance of both constructors.
+    bound.prototype = func.prototype;
+
+    return bound;
+  };
+}
+
+})();