test($animateCss): ensure that transitionStyle by itself doesn't trigger anything

Using `transitionStyle` without any other properties does not trigger an
animation so we could have a test to assert that it doesn't do that.

Author: matsko

src/ngAnimate/animateCss.js

@@ -560,7 +560,10 @@ var $AnimateCssProvider = ['$animateProvider', function($animateProvider) {
 
       // there is no way we can trigger an animation since no styles and
       // no classes are being applied which would then trigger a transition
-      if (!containsKeyframeAnimation && !hasToStyles && !setupClasses) {
+      // is there a raw keyframe value that is applied to the element
+      if (!containsKeyframeAnimation
+           && !hasToStyles
+           && !setupClasses) {
         return closeAndReturnNoopAnimator();
       }
 

test/ngAnimate/animateCssSpec.js

@@ -2017,7 +2017,7 @@ describe("ngAnimate $animateCss", function() {
         });
       });
 
-      describe("[transtionStyle]", function() {
+      describe("[transitionStyle]", function() {
         it("should apply the transition directly onto the element and animate accordingly",
           inject(function($animateCss, $rootElement) {
 
@@ -2092,6 +2092,29 @@ describe("ngAnimate $animateCss", function() {
           expect(element.css('transition-property')).toMatch('color');
           expect(style).toContain('ease-in');
         }));
+
+        it("should only execute the animation if any CSS to styles are mixed into together",
+          inject(function($animateCss, $rootElement) {
+
+          var options = {
+            transitionStyle: '6s 4s ease-out all'
+          };
+
+          $animateCss(element, options).start();
+          triggerAnimationStartFrame();
+
+          expect(element.css(prefix + 'transition-delay')).toEqual('');
+          expect(element.css(prefix + 'transition-duration')).toEqual('');
+          expect(element.css(prefix + 'transition-timing-function')).toEqual('');
+
+          options.to = { color: 'brown' };
+          $animateCss(element, options).start();
+          triggerAnimationStartFrame();
+
+          expect(element.css(prefix + 'transition-delay')).toEqual('4s');
+          expect(element.css(prefix + 'transition-duration')).toEqual('6s');
+          expect(element.css(prefix + 'transition-timing-function')).toEqual('ease-out');
+        }));
       });
 
       describe("[keyframeStyle]", function() {