diff -r 000000000000 -r 6474c204b198 browser/devtools/webconsole/test/browser_webconsole_view_source.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/webconsole/test/browser_webconsole_view_source.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,84 @@
+/* Any copyright is dedicated to the Public Domain.
+ * http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Tests that source URLs in the Web Console can be clicked to display the
+// standard View Source window.
+
+const TEST_URI = "http://example.com/browser/browser/devtools/webconsole/test/test-error.html";
+
+let containsValue;
+let Sources;
+let containsValueInvoked = false;
+
+function test() {
+  addTab(TEST_URI);
+  browser.addEventListener("load", function onLoad() {
+    browser.removeEventListener("load", onLoad, true);
+    openConsole(null, testViewSource);
+  }, true);
+}
+
+function testViewSource(hud) {
+  info("console opened");
+
+  let button = content.document.querySelector("button");
+  ok(button, "we have the button on the page");
+
+  expectUncaughtException();
+  EventUtils.sendMouseEvent({ type: "click" }, button, content);
+
+  openDebugger().then(({panelWin: { DebuggerView }}) => {
+    info("debugger opened");
+    Sources = DebuggerView.Sources;
+    openConsole(null, (hud) => {
+      info("console opened again");
+
+      waitForMessages({
+        webconsole: hud,
+        messages: [{
+          text: "fooBazBaz is not defined",
+          category: CATEGORY_JS,
+          severity: SEVERITY_ERROR,
+        }],
+      }).then(onMessage);
+    });
+  });
+
+  function onMessage([result]) {
+    let msg = [...result.matched][0];
+    ok(msg, "error message");
+    let locationNode = msg.querySelector(".message-location");
+    ok(locationNode, "location node");
+
+    Services.ww.registerNotification(observer);
+
+    containsValue = Sources.containsValue;
+    Sources.containsValue = () => {
+      containsValueInvoked = true;
+      return false;
+    };
+
+    EventUtils.sendMouseEvent({ type: "click" }, locationNode);
+  }
+}
+
+let observer = {
+  observe: function(aSubject, aTopic, aData) {
+    if (aTopic != "domwindowopened") {
+      return;
+    }
+
+    ok(true, "the view source window was opened in response to clicking " +
+       "the location node");
+
+    aSubject.close();
+    ok(containsValueInvoked, "custom containsValue() was invoked");
+    Sources.containsValue = containsValue;
+    Sources = containsValue = null;
+    finishTest();
+  }
+};
+
+registerCleanupFunction(function() {
+  Services.ww.unregisterNotification(observer);
+});