added timing constructor test

target-config.js

@@ -51,6 +51,7 @@
       'test/js/player-finish-event.js',
       'test/js/property-interpolation.js',
       'test/js/tick.js',
+      'test/js/timing.js',
       'test/js/transform-handler.js'];
 
   var maxifillTest = minifillTest.concat(

test/js/animation-constructor.js

@@ -47,4 +47,20 @@ suite('animation-constructor', function() {
     assert.closeTo(leftAsNumber(target2), 15.25, 1);
   });
 
+  test('Timing is always converted to AnimationTimingInput', function() {
+    var target = document.createElement('div');
+    document.body.appendChild(target);
+
+    var steps = [{background: 'blue'}, {background: 'red'}];
+
+    var animation = new Animation(target, steps, 200);
+    assert.equal(animation.timing.duration, 200);
+
+    animation = new Animation(target, steps);
+    assert.isDefined(animation.timing);
+
+    animation = new Animation(target, steps, {duration: 200});
+    var group = new AnimationGroup([animation]);
+    assert.equal(group.timing.duration, 'auto');
+  });
 });

test/js/timing.js

@@ -0,0 +1,27 @@
+suite('timing-tests', function() {
+  setup(function() {
+    document.timeline._players = [];
+  });
+
+  test('changing timing iterations mid-animation', function() {
+    var animation = new Animation(document.body, [], { duration: 1000 });
+
+    // TODO: access internal _timing for now, until .timing is properly generated
+    var timing = animation._timing;
+
+    assert.equal(timing.duration, 1000);
+    assert.equal(timing.iterations, 1.0);
+
+    var player = document.timeline.play(animation);
+    assert(!player.paused);
+    assert.equal(player.currentTime, 0);
+    tick(300);
+    assert.equal(player.startTime, 300);  // why does this pass? the anim is running?
+    assert.equal(player.currentTime, 300, 'after 300ms tick, currentTime should be 300ms');  // this fails -- what, what?
+
+    timing.iterations = 0.5;
+    animation.timing.iterations = 0.5;
+    tick(300);
+    assert.equal(player.currentTime, 500);
+  });
+});