<!DOCTYPE HTML>
<html>
<!--
https://bugzilla.mozilla.org/show_bug.cgi?id=430723
-->
<head>
  <title>Test for Bug 430723</title>
  <script src="/tests/SimpleTest/SimpleTest.js"></script>
  <script src="/tests/SimpleTest/EventUtils.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=430723">Mozilla Bug 430723</a>
<p id="display"></p>
<div id="content" style="display: none">
  
</div>
<pre id="test">
<script class="testbody" type="text/javascript">
// <![CDATA[

/** Test for Bug 430723 */

var BASE_URI = "http://mochi.test:8888/tests/docshell/test/navigation/";
var gTallRedBoxURI = BASE_URI + "redbox_bug430723.html";
var gTallBlueBoxURI = BASE_URI + "bluebox_bug430723.html";

window.onload = runTest;

var testWindow;
var testNum = 0;

var smoothScrollPref = "general.smoothScroll";
function runTest() {
  SpecialPowers.pushPrefEnv({"set": [[smoothScrollPref, false]]}, function() {
    testWindow = window.open(gTallRedBoxURI, "testWindow", "width=300,height=300,location=yes,scrollbars=yes");
  });
}

var nextTest = function() {
  testNum++;
  switch (testNum) {
    case 1: setTimeout(step1, 0); break;
    case 2: setTimeout(step2, 0); break;
    case 3: setTimeout(step3, 0); break;
  }
};

var step1 = function() {
  window.is(String(testWindow.location), gTallRedBoxURI, "Ensure red page loaded.");

  // Navigate down and up.
  is(testWindow.document.body.scrollTop, 0,
     "Page1: Ensure the scrollpane is at the top before we start scrolling.");
  testWindow.addEventListener("scroll", function() {
    isnot(testWindow.document.body.scrollTop, 0,
          "Page1: Ensure we can scroll down.");
    SimpleTest.executeSoon(step1_2);
  }, {capture: true, once: true});
  sendKey("DOWN", testWindow);

  function step1_2() {
    testWindow.addEventListener("scroll", function() {
      is(testWindow.document.body.scrollTop, 0,
         "Page1: Ensure we can scroll up, back to the top.");

      // Nav to blue box page. This should fire step2.
      testWindow.location = gTallBlueBoxURI;
    }, {capture: true, once: true});
    sendKey("UP", testWindow);
  }
};


var step2 = function() {
  window.is(String(testWindow.location), gTallBlueBoxURI, "Ensure blue page loaded.");

  // Scroll around a bit.
  is(testWindow.document.body.scrollTop, 0,
     "Page2: Ensure the scrollpane is at the top before we start scrolling.");

  var scrollTest = function() {
    if (++count < 2) {
      SimpleTest.executeSoon(function() { sendKey("DOWN", testWindow); });
    } else {
      testWindow.removeEventListener("scroll", scrollTest, true);

      isnot(testWindow.document.body.scrollTop, 0,
            "Page2: Ensure we could scroll.");

      // Navigate backwards. This should fire step3.
      testWindow.history.back();
    }
  };

  var count = 0;
  testWindow.addEventListener("scroll", scrollTest, true);
  sendKey("DOWN", testWindow);
};

var step3 = function() {
  window.is(String(testWindow.location), gTallRedBoxURI,
            "Ensure red page restored from history.");

  // Check we can still scroll with the keys.
  is(testWindow.document.body.scrollTop, 0,
     "Page1Again: Ensure scroll pane at top before we scroll.");
  testWindow.addEventListener("scroll", function() {
    isnot(testWindow.document.body.scrollTop, 0,
          "Page2Again: Ensure we can still scroll.");

    testWindow.close();
    window.SimpleTest.finish();
  }, {capture: true, once: true});
  sendKey("DOWN", testWindow);
};

SimpleTest.waitForExplicitFinish();

// ]]>
</script>
</pre>
</body>
</html>
