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<!doctype html>
<meta charset="utf-8">
<title>Remove and add an animation element while the animation is repeating</title>
<script src="/resources/testharness.js"></script>
<script src="/resources/testharnessreport.js"></script>
<svg>
  <animate id="anim" attributeName="visibility" to="visible" begin="0s" dur="2s" repeatCount="4"/>
  <rect x="0" y="0" width="50" height="50" fill="lime">
    <set attributeName="fill" to="red" begin="anim.repeat(0)"/>
  </rect>
  <rect x="50" y="0" width="50" height="50" fill="red">
    <set attributeName="fill" to="lime" begin="anim.repeat(1)"/>
  </rect>
  <rect x="0" y="50" width="50" height="50" fill="red">
    <set attributeName="fill" to="lime" begin="anim.repeat(2)"/>
  </rect>
  <rect x="50" y="50" width="50" height="50" fill="red">
    <set attributeName="fill" to="lime" begin="anim.repeat(3)"/>
  </rect>
</svg>
<script>
  function recreate(anim) {
    anim.parentNode.removeChild(anim);
    return document.querySelector('svg').appendChild(anim.cloneNode());
  }

  function waitFrame() {
    return new Promise(resolve => {
      window.requestAnimationFrame(resolve);
    });
  }

  function checkSetElements(setElements, expected) {
    let fillValues = Array.from(setElements).map(set => {
      return getComputedStyle(set.targetElement, '').fill;
    });
    let remappedExpected = expected.map(color => {
      const colorMap = {'red': 'rgb(255, 0, 0)', 'lime': 'rgb(0, 255, 0)'};
      return colorMap[color];
    })
    assert_array_equals(fillValues, remappedExpected);
  }

  promise_test(t => {
    let svg = document.querySelector('svg');
    let anim = document.getElementById('anim');
    let animWatcher = new EventWatcher(t, anim, ['beginEvent', 'repeatEvent']);
    // Wait for #anims 'beginEvent' and then step through the
    // 'repeatEvents' one at a time.
    let stepsPromise = animWatcher.wait_for('beginEvent').then(() => {
      checkSetElements(setElements, ['lime', 'red', 'red', 'red']);
      svg.setCurrentTime(1.999);
      return animWatcher.wait_for('repeatEvent');
    }).then(() => {
      return waitFrame();
    }).then(() => {
      checkSetElements(setElements, ['lime', 'lime', 'red', 'red']);
      svg.setCurrentTime(2.999);
      return waitFrame();
    }).then(() => {
      checkSetElements(setElements, ['lime', 'lime', 'red', 'red']);
      svg.setCurrentTime(3.999);
      return animWatcher.wait_for('repeatEvent');
    }).then(() => {
      return waitFrame();
    }).then(() => {
      checkSetElements(setElements, ['lime', 'lime', 'lime', 'red']);
      let newAnim = recreate(anim);
      let animWatcher = new EventWatcher(t, newAnim, ['repeatEvent']);
      svg.setCurrentTime(5.999);
      return animWatcher.wait_for('repeatEvent');
    }).then(() => {
      return waitFrame();
    }).then(() => {
      checkSetElements(setElements, ['lime', 'lime', 'lime', 'lime']);
    });
    let setElements = document.getElementsByTagName('set');
    let setBeginWatchers = Array.from(setElements).map(element => {
      return new EventWatcher(t, element, 'beginEvent');
    });
    // Expect 'beginEvent' to be dispatched once for all but the first 'set' element.
    let setPromises = setBeginWatchers.slice(1).map(watcher => {
      return watcher.wait_for('beginEvent').then(evt => {
        let target = evt.target.targetElement;
        assert_equals(getComputedStyle(target, '').fill, 'rgb(0, 255, 0)');
      });
    });
    return Promise.all([stepsPromise, ...setPromises]);
  });
</script>