test_bug1390159.xhtml

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<?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"?>

<!--

https://bugzilla.mozilla.org/show_bug.cgi?id=1390159

-->

<window title="Mozilla Bug 1390159"

  xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">

  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"></script>

  <!-- test code goes here -->

  <script type="application/javascript"><![CDATA[

    function test() {

      var xulRuntime = Services.appinfo;

      // Make sure it has an inSafeMode property. This is just an arbitrary

      // readonly property.

      var oldValue = xulRuntime.inSafeMode;

      is(typeof oldValue, "boolean", "Expected an inSafeMode property");

      // Changing a readonly property doesn't throw, but shouldn't change

      // the value.

      xulRuntime.inSafeMode = !oldValue;

      is(xulRuntime.inSafeMode, oldValue, "Should not have modified prop");

      // Adding a new property should throw.

      let ex = null;

      try {

        xulRuntime.foobar = 1;

      } catch (e) {

        ex = e;

      is(ex.toString().includes("Cannot modify"), true, "Expected an error");

      is(xulRuntime.foobar, undefined, "Property not defined");

    test();

  ]]></script>

  <!-- test results are displayed in the html:body -->

  <body xmlns="http://www.w3.org/1999/xhtml">

  </body>

</window>