1 files changed, 127 insertions, 0 deletions
diff --git a/js/xpconnect/tests/chrome/test_scriptSettings.xhtml b/js/xpconnect/tests/chrome/test_scriptSettings.xhtml
new file mode 100644
index 0000000000..3c41c0bfdc
--- /dev/null
+++ b/js/xpconnect/tests/chrome/test_scriptSettings.xhtml
@@ -0,0 +1,127 @@
+<?xml version="1.0"?>
+<?xml-stylesheet type="text/css" href="chrome://global/skin"?>
+<?xml-stylesheet type="text/css" href="chrome://mochikit/content/tests/SimpleTest/test.css"?>
+<!--
+https://bugzilla.mozilla.org/show_bug.cgi?id=937317
+-->
+<window title="Mozilla Bug 937317"
+        xmlns="http://www.mozilla.org/keymaster/gatekeeper/there.is.only.xul">
+  <script src="chrome://mochikit/content/tests/SimpleTest/SimpleTest.js"/>
+
+  <!-- test results are displayed in the html:body -->
+  <body xmlns="http://www.w3.org/1999/xhtml">
+  <a href="https://bugzilla.mozilla.org/show_bug.cgi?id=937317"
+     target="_blank">Mozilla Bug 937317</a>
+  </body>
+
+  <!-- test code goes here -->
+  <iframe src="./file_empty.html"></iframe>
+  <script type="application/javascript">
+  <![CDATA[
+
+  /** Test for the script settings stack. **/
+  SimpleTest.waitForExplicitFinish();
+  SpecialPowers.pushPrefEnv({"set": [["security.allow_eval_with_system_principal",
+                                      true]]});
+  addLoadEvent(function() {
+    let iwin = window[0];
+
+    // Smoketest.
+    is(Cu.getIncumbentGlobal(), window, "smoketest");
+
+    // Calling a cross-compartment non-scripted function changes the
+    // compartment, but not the incumbent script settings object.
+    var sb = new Cu.Sandbox(window, { wantComponents: true });
+    is(sb.Components.utils.getIncumbentGlobal(), window, "cross-compartment sb non-scripted");
+    is(iwin.Components.utils.getIncumbentGlobal(), window, "cross-compartment win non-scripted");
+
+    // If we call a scripted function in the other compartment, that becomes
+    // the incumbent script.
+    function gib() { return Cu.getIncumbentGlobal(); };
+    Cu.evalInSandbox(gib.toSource(), sb);
+    iwin.eval(gib.toSource());
+    is(sb.gib(), sb, "cross-compartment sb scripted");
+    is(iwin.gib(), iwin, "cross-compartment win scripted");
+
+    // Eval-ing top-level script in another component makes that compartment the
+    // incumbent script.
+    is(Cu.evalInSandbox('Components.utils.getIncumbentGlobal()', sb), sb, 'eval sb');
+    is(iwin.eval('Components.utils.getIncumbentGlobal()'), iwin, 'eval iwin');
+
+    // Make sure that the callback mechanism works.
+    function makeCallback(expectedGlobal, deferred, kind) {
+      function cb(incumbentGlobal) {
+        is(incumbentGlobal, expectedGlobal, "Callback got the right incumbent global: " + kind);
+        if (deferred)
+          deferred.resolve();
+      }
+      info("Generated callback: " + kind);
+      return cb;
+    }
+
+    var bound = Cu.getIncumbentGlobal.bind(Cu, makeCallback(window, undefined, "simple bound"));
+    is(bound(), window, "Bound method returns the right global");
+
+    // Callbacks grab the incumbent script at the time of invocation.
+    //
+    // Note - We avoid calling the initial defer |d| so that it's not in-scope for everything below.
+    let initialDefer = Promise.withResolvers();
+    setTimeout(Cu.getIncumbentGlobal.bind(Cu, makeCallback(window, initialDefer, "same-global setTimeout")), 0);
+    initialDefer.promise.then(function() {
+
+      // Try cross-global setTimeout where |window| is the incumbent script when the callback is created.
+      let d = Promise.withResolvers();
+      iwin.setTimeout(Cu.getIncumbentGlobal.bind(Cu, makeCallback(window, d, "cross-global setTimeout by |window|")), 0);
+      return d.promise;
+    }).then(function() {
+
+      // Try cross-global setTimeout where |iwin| is the incumbent script when the callback is created.
+      let d = Promise.withResolvers();
+      iwin.wrappedJSObject.timeoutFun = Cu.getIncumbentGlobal.bind(Cu, makeCallback(iwin, d, "cross-global setTimeout by |iwin|"));
+      iwin.eval('setTimeout(timeoutFun, 0);');
+      return d.promise;
+    }).then(function() {
+
+      // The incumbent script override doesn't take effect if the callback is scripted.
+      let d = Promise.withResolvers();
+      iwin.wrappedJSObject.timeoutFun2 = Cu.getIncumbentGlobal.bind(Cu, makeCallback(iwin, d, "cross-global setTimeout of scripted function"));
+      iwin.eval('var timeoutFun2Wrapper = function() { timeoutFun2(); }');
+      setTimeout(iwin.wrappedJSObject.timeoutFun2Wrapper, 0);
+      return d.promise;
+    }).then(function() {
+
+      // Try event listeners.
+      let d = Promise.withResolvers();
+      let body = iwin.document.body;
+      body.addEventListener('click', Cu.getIncumbentGlobal.bind(Cu, makeCallback(window, d, "cross-global event listener")));
+      body.dispatchEvent(new iwin.MouseEvent('click'));
+      return d.promise;
+
+    }).then(function() {
+
+      // Try an event handler set by |iwin|.
+      let d = Promise.withResolvers();
+      let body = iwin.document.body;
+      iwin.wrappedJSObject.handler = Cu.getIncumbentGlobal.bind(Cu, makeCallback(iwin, d, "cross-global event handler"));
+      iwin.eval('document.body.onmousemove = handler');
+      body.dispatchEvent(new iwin.MouseEvent('mousemove'));
+      return d.promise;
+
+    }).then(function() {
+
+      // Try an event handler compiled by a content attribute.
+      let d = Promise.withResolvers();
+      let body = iwin.document.body;
+      iwin.wrappedJSObject.innerHandler = Cu.getIncumbentGlobal.bind(Cu, makeCallback(iwin, d, "cross-global compiled event handler"));
+      iwin.eval("document.body.setAttribute('onmouseout', 'innerHandler()')");
+      body.dispatchEvent(new iwin.MouseEvent('mouseout'));
+      return d.promise;
+    }).then(function() {
+
+      SimpleTest.finish();
+    });
+  });
+
+  ]]>
+  </script>
+</window>