| Index: third_party/WebKit/LayoutTests/fast/animation/scroll-animations/scrolltimeline-creation.html | 
| diff --git a/third_party/WebKit/LayoutTests/fast/animation/scroll-animations/scrolltimeline-creation.html b/third_party/WebKit/LayoutTests/fast/animation/scroll-animations/scrolltimeline-creation.html | 
| new file mode 100644 | 
| index 0000000000000000000000000000000000000000..da71e68379264fcd7f37d168f9829c0730cb074e | 
| --- /dev/null | 
| +++ b/third_party/WebKit/LayoutTests/fast/animation/scroll-animations/scrolltimeline-creation.html | 
| @@ -0,0 +1,53 @@ | 
| +<!DOCTYPE html> | 
| +<style> | 
| +.scroller { | 
| +  height: 100px; | 
| +  width: 100px; | 
| +  overflow: auto; | 
| +} | 
| + | 
| +.content { | 
| +  height: 500px; | 
| +  width: 500px; | 
| +} | 
| +</style> | 
| + | 
| +<div class='scroller'> | 
| +  <div class='content'></div> | 
| +</div> | 
| + | 
| +<script src='../../../resources/testharness.js'></script> | 
| +<script src='../../../resources/testharnessreport.js'></script> | 
| +<script> | 
| +test(function() { | 
| +  const scroller = document.querySelector('.scroller'); | 
| +  const scrollTimeline = new ScrollTimeline( | 
| +      { scrollSource: scroller, timeRange: 100, orientation: 'inline' }); | 
| + | 
| +  assert_equals(scrollTimeline.scrollSource, scroller); | 
| +  assert_equals(scrollTimeline.timeRange, 100); | 
| +  assert_equals(scrollTimeline.orientation, 'inline'); | 
| +}, 'Basic ScrollTimeline creation should work'); | 
| + | 
| +test(function() { | 
| +  const scrollTimeline = new ScrollTimeline( | 
| +      { timeRange: 100, orientation: 'block' }); | 
| + | 
| +  assert_equals(scrollTimeline.scrollSource, document.scrollingElement); | 
| +}, 'If the scrollSource is unspecified, use the document scrollingElement'); | 
| + | 
| +test(function() { | 
| +  const scroller = document.querySelector('.scroller'); | 
| +  const constructorFunc = function() { new ScrollTimeline( | 
| +      { scrollSource: scroller, orientation: 'nonsense', timeRange: 100 }) }; | 
| +  assert_throws(TypeError(), constructorFunc); | 
| +}, 'If the orientation is invalid, object construction should fail'); | 
| + | 
| +// TODO(smcgruer): Remove once 'auto' timeRange is supported. | 
| +test(function() { | 
| +  const scroller = document.querySelector('.scroller'); | 
| +  const constructorFunc = function() { new ScrollTimeline( | 
| +      { scrollSource: scroller, orientation: 'block' }) }; | 
| +  assert_throws('NotSupportedError', constructorFunc); | 
| +}, 'If the timeRange is unspecified, object construction should fail'); | 
| +</script> | 
|  |