Fixed incorrect context in fastdom-promised

Fixes issue #81

.travis.yml

@@ -1,20 +1,21 @@
+sudo: true
 language: node_js
 
 node_js:
   - 5.1.0
 
 addons:
   firefox: latest
-  apt:
-    sources:
-      - google-chrome
-    packages:
-      - google-chrome-stable
 
 before_script:
-  - export CHROME_BIN=$(which google-chrome-stable)
-  - export DISPLAY=:99.0
   - sh -e /etc/init.d/xvfb start
+  - sudo add-apt-repository -y ppa:canonical-chromium-builds/stage
+  - sudo apt-get update -y
+  - sudo apt-get install -y chromium-browser
+  - echo $(which chromium-browser)
+  - echo $(which chromium)
+  - export CHROME_BIN=$(which chromium-browser)
+  - export DISPLAY=:99.0
 
 after_script:
   - npm run coveralls

extensions/fastdom-promised.js

@@ -60,7 +60,7 @@ function create(promised, type, fn, ctx) {
   var promise = new Promise(function(resolve, reject) {
     task = fastdom[type](function() {
       tasks.delete(promise);
-      try { resolve(fn()); }
+      try { resolve(ctx ? fn.call(ctx) : fn()); }
       catch (e) { reject(e); }
     }, ctx);
   });

test/fastdom-promised-test.js

@@ -45,4 +45,14 @@ suite('fastdom-promised', function() {
       done();
     });
   });
+
+  test('it calls callback with given context', function() {
+    var spy = sinon.spy();
+    var ctx = {};
+
+    return fastdom.measure(spy, ctx)
+      .then(function() {
+        sinon.assert.calledOn(spy, ctx);
+      });
+  });
 });