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+<!DOCTYPE HTML>
+<html>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=608030
+-->
+<head>
+ <title>Test for MozAfterPaint pref Bug 608030</title>
+ <script type="application/javascript" src="/tests/SimpleTest/SimpleTest.js"></script>
+ <link rel="stylesheet" type="text/css" href="/tests/SimpleTest/test.css"/>
+</head>
+<body>
+<a target="_blank" href="https://bugzilla.mozilla.org/show_bug.cgi?id=608030">Mozilla Bug 608030</a>
+<div id="display" style="width: 10em; height: 5em; background-color: red"></div>
+<pre id="test">
+<script type="application/javascript">
+
+/** Test for Bug 608030 **/
+
+SimpleTest.waitForExplicitFinish();
+SimpleTest.requestFlakyTimeout("untriaged");
+
+window.addEventListener("load", step0, false);
+
+is(SpecialPowers.getBoolPref("dom.send_after_paint_to_content"), true, "pref defaults to true in mochitest harness");
+
+function print_rect(rect) {
+ return "(top=" + rect.top + ",left=" + rect.left + ",width=" + rect.width + ",height=" + rect.height + ")";
+}
+
+function print_event(event) {
+ var res = "boundingClientRect=" + print_rect(event.boundingClientRect);
+ var rects = event.clientRects;
+ for (var i = 0; i < rects.length; ++i) {
+ res += " clientRects[" + i + "]=" + print_rect(rects[i]);
+ }
+ return res;
+}
+
+function step0(event) {
+ // Wait until we get the MozAfterPaint following the load event
+ // before starting.
+ ok(true, "loaded");
+ window.addEventListener("MozAfterPaint", step1, false);
+
+ // Ensure a MozAfterPaint event is fired
+ div.style.backgroundColor = "yellow";
+}
+
+var start;
+var div = document.getElementById("display");
+
+function step1(event)
+{
+ ok(true, "step1 reached: " + print_event(event));
+ window.removeEventListener("MozAfterPaint", step1, false);
+
+ start = Date.now();
+
+ window.addEventListener("MozAfterPaint", step2, false);
+
+ div.style.backgroundColor = "blue";
+}
+
+function step2(event)
+{
+ ok(true, "step2 reached: " + print_event(event));
+ window.removeEventListener("MozAfterPaint", step2, false);
+
+ var end = Date.now();
+ var timeout = 3 * Math.max(end - start, 300);
+
+ ok(true, "got MozAfterPaint (timeout for next step is " + timeout + "ms)");
+
+ // Set the pref for our second test
+
+ // When there was previously another page in our window, we seem to
+ // get duplicate events, simultaneously, so we need to register our
+ // next listener after a zero timeout.
+ SpecialPowers.pushPrefEnv({'set': [['dom.send_after_paint_to_content', false]]}, function() {setTimeout(step3, 0, timeout);});
+}
+function step3(timeout)
+{
+ ok(true, "step3 reached");
+ window.addEventListener("MozAfterPaint", failstep, false);
+
+ div.style.backgroundColor = "fuchsia";
+
+ setTimeout(step4, timeout);
+}
+
+function failstep(event)
+{
+ ok(true, "failstep reached: " + print_event(event));
+ ok(false, "got MozAfterPaint when we should not have");
+}
+
+function step4()
+{
+ ok(true, "step4 reached"); // If we didn't get the failure in failstep,
+ // then we passed.
+
+ window.removeEventListener("MozAfterPaint", failstep, false);
+
+ // Set the pref back in its initial state.
+ SpecialPowers.pushPrefEnv({'set': [['dom.send_after_paint_to_content', true]]}, SimpleTest.finish);
+}
+
+</script>
+</pre>
+</body>
+</html>