gecko-dev/dom/smil/test/test_smilRestart.xhtml

<html xmlns="http://www.w3.org/1999/xhtml">
<head>
  <title>Test for SMIL Restart Behavior </title>
  <script type="text/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
  <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css" />
</head>
<body>
<p id="display"></p>
<div id="content" style="display: none">
<svg id="svg" xmlns="http://www.w3.org/2000/svg" width="120px" height="120px"
     onload="this.pauseAnimations()">
  <!-- These 3 circles only differ in their animation's "restart" value -->
  <circle cx="20" cy="20" r="15" fill="blue">
    <animate attributeName="cx" from="20" to="100" begin="1s" dur="4s"
             restart="always" id="always" attributeType="XML"/>
  </circle>
  <circle cx="20" cy="60" r="15" fill="blue">
    <animate attributeName="cx" from="20" to="100" begin="1s" dur="4s"
             restart="whenNotActive" id="whenNotActive" attributeType="XML"/>
  </circle>
  <circle cx="20" cy="100" r="15" fill="blue">
    <animate attributeName="cx" from="20" to="100" begin="1s" dur="4s"
             restart="never" id="never" attributeType="XML"/>
  </circle>
</svg>
</div>
<pre id="test">
<script class="testbody" type="text/javascript">
<![CDATA[
/** Test for SMIL Restart Behavior  **/

/* Global Variables */
var svg = document.getElementById("svg");
var always = document.getElementById("always");
var whenNotActive = document.getElementById("whenNotActive");
var never = document.getElementById("never");

SimpleTest.waitForExplicitFinish();

function tryRestart(elem, state, expected) {
  var restartTime = svg.getCurrentTime();
  elem.beginElement();
  var restart = false;
  try {
    restart = (elem.getStartTime() === restartTime);
  } catch (e) {
    if (e.name != "InvalidStateError" ||
        e.code != DOMException.INVALID_STATE_ERR)
      throw e;
    restart = false;
  }
  if (expected) {
    var msg = elem.id + " can't restart in " + state + " state";
    ok(restart, msg);
  } else {
    var msg = elem.id + " can restart in " + state + " state";
    ok(!restart, msg);
  }
}

function main() {
  ok(svg.animationsPaused(), "should be paused by <svg> load handler");
  is(svg.getCurrentTime(), 0, "should be paused at 0 in <svg> load handler");

  // At first everything should be starting at 1s
  is(always.getStartTime(), 1);
  is(whenNotActive.getStartTime(), 1);
  is(never.getStartTime(), 1);

  // Now try to restart everything early, should be allowed by all
  tryRestart(always, "waiting", true);
  tryRestart(whenNotActive, "waiting", true);
  tryRestart(never, "waiting", true);

  // Now skip to half-way
  var newTime = always.getStartTime() + 0.5 * always.getSimpleDuration();
  svg.setCurrentTime(newTime);

  // Only 'always' should be able to be restarted
  tryRestart(always, "active", true);
  tryRestart(whenNotActive, "active", false);
  tryRestart(never, "active", false);

  // Now skip to the end
  newTime = always.getStartTime() + always.getSimpleDuration() + 1;
  svg.setCurrentTime(newTime);

  // All animations have finished, so 'always' and 'whenNotActive' should be
  // able to be restarted
  tryRestart(always, "postactive", true);
  tryRestart(whenNotActive, "postactive", true);
  tryRestart(never, "postactive", false);

  SimpleTest.finish();
}

window.addEventListener("load", main, false);
]]>
</script>
</pre>
</body>
</html>