<!DOCTYPE html>
<meta name="viewport" content="width=device-width,initial-scale=1,minimum-scale=1">
<link rel="help" src="https://drafts.csswg.org/scroll-animations-1/#scroll-timeline-axis">
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<script src="/web-animations/testcommon.js"></script>
<style>
  .scroller {
    overflow: hidden;
    width: 100px;
    height: 100px;
  }
  .contents {
    height: 200px;
    width: 200px;
  }
  @keyframes expand {
    from { width: 100px; }
    to { width: 200px; }
  }
  #timeline_initial_axis {
    scroll-timeline: --timeline_initial_axis;
  }
  #timeline_y {
    scroll-timeline: --timeline_y y;
  }
  #timeline_x {
    scroll-timeline: --timeline_x x;
  }
  #timeline_block_in_horizontal {
    scroll-timeline: --timeline_block_in_horizontal block;
  }
  #timeline_inline_in_horizontal {
    scroll-timeline: --timeline_inline_in_horizontal inline;
  }
  #timeline_block_in_vertical {
    scroll-timeline: --timeline_block_in_vertical block;
    writing-mode: vertical-lr;
  }
  #timeline_inline_in_vertical {
    scroll-timeline: --timeline_inline_in_vertical inline;
    writing-mode: vertical-lr;
  }
  .target {
    width: 0px;
    animation-name: expand;
    animation-duration: 10s;
    animation-timing-function: linear;
    position: absolute;
  }
  /* Ensure stable expectations if feature is not supported */
  @supports not (animation-timeline:--foo) {
    .target { animation-play-state: paused; }
  }
  #element_initial_axis { animation-timeline: --timeline_initial_axis; }
  #element_y { animation-timeline: --timeline_y; }
  #element_x { animation-timeline: --timeline_x; }
  #element_block_in_horizontal { animation-timeline: --timeline_block_in_horizontal; }
  #element_inline_in_horizontal { animation-timeline: --timeline_inline_in_horizontal; }
  #element_block_in_vertical { animation-timeline: --timeline_block_in_vertical; }
  #element_inline_in_vertical { animation-timeline: --timeline_inline_in_vertical; }
</style>
<div class=scroller id=timeline_initial_axis>
  <div class=contents></div>
  <div class=target id=element_initial_axis></div>
</div>
<div class=scroller id=timeline_y>
  <div class=contents></div>
  <div class=target id=element_y></div>
</div>
<div class=scroller id=timeline_x>
  <div class=contents></div>
  <div class=target id=element_x></div>
</div>
<div class=scroller id=timeline_block_in_horizontal>
  <div class=contents></div>
  <div class=target id=element_block_in_horizontal></div>
</div>
<div class=scroller id=timeline_inline_in_horizontal>
  <div class=contents></div>
  <div class=target id=element_inline_in_horizontal></div>
</div>
<div class=scroller id=timeline_block_in_vertical>
  <div class=contents></div>
  <div class=target id=element_block_in_vertical></div>
</div>
<div class=scroller id=timeline_inline_in_vertical>
  <div class=contents></div>
  <div class=target id=element_inline_in_vertical></div>
</div>
<script>
  async function setScrollPositions() {
    return runAndWaitForFrameUpdate(() => {
      // Animations linked to vertical scroll-timelines are at 75% progress.
      timeline_initial_axis.scrollTop = 75;
      timeline_y.scrollTop = 75;
      timeline_block_in_horizontal.scrollTop = 75;
      timeline_inline_in_vertical.scrollTop = 75;
      // Animations linked to horizontal scroll-timelines are at 25% progress.
      timeline_x.scrollLeft = 25;
      timeline_block_in_vertical.scrollLeft = 25;
      timeline_inline_in_horizontal.scrollLeft = 25;
    });
  }

  promise_test(async (t) => {
    await setScrollPositions();
    assert_equals(getComputedStyle(element_initial_axis).width, '175px');
  }, 'Initial axis');

  promise_test(async (t) => {
    await setScrollPositions();
    assert_equals(getComputedStyle(element_y).width, '175px');
  }, 'Vertical axis');

  promise_test(async (t) => {
    await setScrollPositions();
    assert_equals(getComputedStyle(element_x).width, '125px');
  }, 'Horizontal axis');

  promise_test(async (t) => {
    await setScrollPositions();
    assert_equals(getComputedStyle(element_block_in_horizontal).width, '175px');
  }, 'Block axis in horizontal writing-mode');

  promise_test(async (t) => {
    await setScrollPositions();
    assert_equals(getComputedStyle(element_inline_in_horizontal).width, '125px');
  }, 'Inline axis in horizontal writing-mode');

  promise_test(async (t) => {
    await setScrollPositions();
    assert_equals(getComputedStyle(timeline_block_in_vertical).writingMode, 'vertical-lr');
    assert_equals(getComputedStyle(element_block_in_vertical).width, '125px');
  }, 'Block axis in vertical writing-mode');

  promise_test(async (t) => {
    await setScrollPositions();
    assert_equals(getComputedStyle(timeline_inline_in_vertical).writingMode, 'vertical-lr');
    assert_equals(getComputedStyle(element_inline_in_vertical).width, '175px');
  }, 'Inline axis in vertical writing-mode');

</script>
