1 files changed, 30 insertions, 0 deletions
diff --git a/layout/base/tests/chrome/dialog_with_positioning_window.xhtml b/layout/base/tests/chrome/dialog_with_positioning_window.xhtml
new file mode 100644
index 0000000000..a854248b21
--- /dev/null
+++ b/layout/base/tests/chrome/dialog_with_positioning_window.xhtml
@@ -0,0 +1,30 @@
+<?xml version="1.0" encoding="UTF-8" ?>
+<?xml-stylesheet href="chrome://global/skin/global.css" type="text/css"?>
+<window xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul"
+        onload="setTimeout(runTest, 0)">
+  <vbox>
+    <label value="powered by example.com" style="padding: 16px;"/>
+  </vbox>
+  <hbox id="t" style="display: block; position: fixed; right: 16px; bottom: 16px;">
+    <button label="OK"/>
+  </hbox>
+<script><![CDATA[
+var SimpleTest = window.arguments[0].SimpleTest;
+var SpecialPowers = window.arguments[0].SpecialPowers;
+var is = window.arguments[0].is;
+var ok = window.arguments[0].ok;
+
+// We run this off a setTimeout from onload, because the XUL window
+// only does its intrinsic-height layout after the load event has
+// finished
+function runTest() {
+  var t = document.getElementById("t");
+  var tBottom = t.getBoundingClientRect().bottom;
+  is(tBottom, document.documentElement.getBoundingClientRect().bottom - 16,
+     "check fixed-pos element t bottom positioned correctly");
+  ok(tBottom < 200, "fixed-pos element t bottom must be sane, less than 200 (got " + tBottom + ")");
+  window.close();
+  SimpleTest.finish();
+}
+]]></script>
+</window>