diff -r 000000000000 -r 6474c204b198 browser/devtools/framework/test/browser_toolbox_options_disable_js.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/framework/test/browser_toolbox_options_disable_js.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,131 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that disabling JavaScript for a tab works as it should.
+
+const TEST_URI = "http://example.com/browser/browser/devtools/framework/" +
+                 "test/browser_toolbox_options_disable_js.html";
+
+let doc;
+let toolbox;
+
+function test() {
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  let target = TargetFactory.forTab(gBrowser.selectedTab);
+
+  gBrowser.selectedBrowser.addEventListener("load", function onLoad(evt) {
+    gBrowser.selectedBrowser.removeEventListener(evt.type, onLoad, true);
+    doc = content.document;
+    gDevTools.showToolbox(target).then(testSelectTool);
+  }, true);
+
+  content.location = TEST_URI;
+}
+
+function testSelectTool(aToolbox) {
+  toolbox = aToolbox;
+  toolbox.once("options-selected", testJSEnabled);
+  toolbox.selectTool("options");
+}
+
+function testJSEnabled(event, tool, secondPass) {
+  ok(true, "Toolbox selected via selectTool method");
+  info("Testing that JS is enabled");
+
+  let logJSEnabled = doc.getElementById("logJSEnabled");
+  let output = doc.getElementById("output");
+
+  // We use executeSoon here because switching docSehll.allowJavascript to true
+  // takes a while to become live.
+  executeSoon(function() {
+    EventUtils.synthesizeMouseAtCenter(logJSEnabled, {}, doc.defaultView);
+    is(output.textContent, "JavaScript Enabled", 'Output is "JavaScript Enabled"');
+    testJSEnabledIframe(secondPass);
+  });
+}
+
+function testJSEnabledIframe(secondPass) {
+  info("Testing that JS is enabled in the iframe");
+
+  let iframe = doc.querySelector("iframe");
+  let iframeDoc = iframe.contentDocument;
+  let logJSEnabled = iframeDoc.getElementById("logJSEnabled");
+  let output = iframeDoc.getElementById("output");
+
+  EventUtils.synthesizeMouseAtCenter(logJSEnabled, {}, iframe.contentWindow);
+  is(output.textContent, "JavaScript Enabled",
+                         'Output is "JavaScript Enabled" in iframe');
+  if (secondPass) {
+    finishUp();
+  } else {
+    toggleJS().then(testJSDisabled);
+  }
+}
+
+function toggleJS() {
+  let deferred = promise.defer();
+  let panel = toolbox.getCurrentPanel();
+  let cbx = panel.panelDoc.getElementById("devtools-disable-javascript");
+
+  cbx.scrollIntoView();
+
+  if (cbx.checked) {
+    info("Clearing checkbox to re-enable JS");
+  } else {
+    info("Checking checkbox to disable JS");
+  }
+
+  // After uising scrollIntoView() we need to use executeSoon() to wait for the
+  // browser to scroll.
+  executeSoon(function() {
+    gBrowser.selectedBrowser.addEventListener("load", function onLoad(evt) {
+      gBrowser.selectedBrowser.removeEventListener(evt.type, onLoad, true);
+      doc = content.document;
+
+      deferred.resolve();
+    }, true);
+
+    EventUtils.synthesizeMouseAtCenter(cbx, {}, panel.panelWin);
+  });
+
+  return deferred.promise;
+}
+
+function testJSDisabled() {
+  info("Testing that JS is disabled");
+
+  let logJSDisabled = doc.getElementById("logJSDisabled");
+  let output = doc.getElementById("output");
+
+  EventUtils.synthesizeMouseAtCenter(logJSDisabled, {}, doc.defaultView);
+  ok(output.textContent !== "JavaScript Disabled",
+     'output is not "JavaScript Disabled"');
+
+  testJSDisabledIframe();
+}
+
+function testJSDisabledIframe() {
+  info("Testing that JS is disabled in the iframe");
+
+  let iframe = doc.querySelector("iframe");
+  let iframeDoc = iframe.contentDocument;
+  let logJSDisabled = iframeDoc.getElementById("logJSDisabled");
+  let output = iframeDoc.getElementById("output");
+
+  EventUtils.synthesizeMouseAtCenter(logJSDisabled, {}, iframe.contentWindow);
+  ok(output.textContent !== "JavaScript Disabled",
+     'output is not "JavaScript Disabled" in iframe');
+  toggleJS().then(function() {
+    testJSEnabled(null, null, true);
+  });
+}
+
+function finishUp() {
+  toolbox.destroy().then(function() {
+    gBrowser.removeCurrentTab();
+    toolbox = doc = null;
+    finish();
+  });
+}