diff -r 000000000000 -r 6474c204b198 browser/devtools/webconsole/test/browser_warn_user_about_replaced_api.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/webconsole/test/browser_warn_user_about_replaced_api.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,79 @@
+/* vim:set ts=2 sw=2 sts=2 et: */
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+
+const TEST_REPLACED_API_URI = "http://example.com/browser/browser/devtools/webconsole/test/test-console-replaced-api.html";
+const TEST_URI = "http://example.com/browser/browser/devtools/webconsole/test/testscript.js";
+
+function test() {
+  waitForExplicitFinish();
+
+  const PREF = "devtools.webconsole.persistlog";
+  Services.prefs.setBoolPref(PREF, true);
+  registerCleanupFunction(() => Services.prefs.clearUserPref(PREF));
+
+  // First test that the warning does not appear on a page that doesn't override
+  // the window.console object.
+  addTab(TEST_URI);
+  browser.addEventListener("load", function onLoad() {
+    browser.removeEventListener("load", onLoad, true);
+    openConsole(null, testWarningNotPresent);
+  }, true);
+
+  function testWarningNotPresent(hud)
+  {
+    is(hud.outputNode.textContent.indexOf("logging API"), -1,
+       "no warning displayed");
+
+    // Bug 862024: make sure the warning doesn't show after page reload.
+    info("reload " + TEST_URI);
+    executeSoon(() => content.location.reload());
+
+    waitForMessages({
+      webconsole: hud,
+      messages: [{
+        text: "testscript.js",
+        category: CATEGORY_NETWORK,
+      }],
+    }).then(() => executeSoon(() => {
+      is(hud.outputNode.textContent.indexOf("logging API"), -1,
+         "no warning displayed");
+
+      closeConsole(null, loadTestPage);
+    }));
+  }
+
+  function loadTestPage()
+  {
+    info("load test " + TEST_REPLACED_API_URI);
+    browser.addEventListener("load", function onLoad() {
+      browser.removeEventListener("load", onLoad, true);
+      openConsole(null, testWarningPresent);
+    }, true);
+    content.location = TEST_REPLACED_API_URI;
+  }
+
+  function testWarningPresent(hud)
+  {
+    info("wait for the warning to show");
+    let warning = {
+      webconsole: hud,
+      messages: [{
+        text: /logging API .+ disabled by a script/,
+        category: CATEGORY_JS,
+        severity: SEVERITY_WARNING,
+      }],
+    };
+
+    waitForMessages(warning).then(() => {
+      hud.jsterm.clearOutput();
+
+      executeSoon(() => {
+        info("reload the test page and wait for the warning to show");
+        waitForMessages(warning).then(finishTest);
+        content.location.reload();
+      });
+    });
+  }
+}