widget/tests/test_position_on_resize.xul

<?xml version="1.0"?>
<?xml-stylesheet href="chrome://global/skin" type="text/css"?>
<?xml-stylesheet href="chrome://mochikit/content/tests/SimpleTest/test.css"
                 type="text/css"?>

<window title="Window Position On Resize Test"
        onload="startTest()"
        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

  <script type="application/javascript"
          src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
  <script type="application/javascript"
          src="chrome://mochikit/content/tests/SimpleTest/EventUtils.js"/>

<script class="testbody" type="application/javascript"><![CDATA[
  SimpleTest.waitForExplicitFinish();
  let win, x, y;

  function startTest() {
    win = window.openDialog("about:blank",
                            null,
                            "chrome,dialog=no,outerHeight=170,outerWidth=200");
    waitForSuccess(function() { return win.mozPaintCount },
                   "No paint received", checkInitialSize);
  }

  function checkInitialSize() {
    let runtime = Components.classes["@mozilla.org/xre/app-info;1"]
                            .getService(Components.interfaces.nsIXULRuntime);
    let test = runtime.widgetToolkit == "windows" ? todo_is : is; // bug 602745
    test(win.outerHeight,170, "initial outerHeight");
    test(win.outerWidth, 200, "initial outerWidth");
    x = win.screenX;
    y = win.screenY;
    shrink();
  }
  function shrink() {
    win.resizeTo(180, 160);
    waitForSuccess(function() { return win.outerHeight == 160 },
                   "outerHeight did not change to 160", checkShrink);
  }
  function checkShrink() {
    is(win.outerWidth, 180, "resized outerWidth");
    is(win.screenY, y, "resized window top should not change");
    y = win.screenY;
    restore();
  }
  function restore() {
    win.resizeBy(20, 10);
    waitForSuccess(function() { return win.outerHeight == 170 },
                   "outerHeight did not change to 170", checkRestore);
  }
  function checkRestore() {
    is(win.outerWidth, 200, "restored outerWidth");
    is(win.screenX, x, "restored window left should not change");
    is(win.screenY, y, "restored window top should not change");
    done();
  }
  function done() {
    win.close();
    SimpleTest.finish();
  }

  function waitForSuccess(testForSuccess, failureMsg, nextFunc) {
    var waitCount = 0;

    function repeatWait() {
      ++waitCount;

      if (testForSuccess()) {
        nextFunc();
      }
      else if (waitCount > 50) {
        ok(false, failureMsg);
        nextFunc();
      } else {
        setTimeout(repeatWait, 100);
      }
    }

    repeatWait();
  }
]]></script>

<body xmlns="http://www.w3.org/1999/xhtml">
<p id="display">
</p>
<div id="content" style="display: none">
</div>
<pre id="test">
</pre>
</body>

</window>