diff -r 000000000000 -r 6474c204b198 browser/devtools/debugger/test/browser_dbg_no-page-sources.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/debugger/test/browser_dbg_no-page-sources.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,50 @@
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+/**
+ * Make sure the right text shows when the page has no sources.
+ */
+
+const TAB_URL = EXAMPLE_URL + "doc_no-page-sources.html";
+
+let gTab, gDebuggee, gPanel, gDebugger;
+let gEditor, gSources;
+
+function test() {
+  initDebugger(TAB_URL).then(([aTab, aDebuggee, aPanel]) => {
+    gTab = aTab;
+    gDebuggee = aDebuggee;
+    gPanel = aPanel;
+    gDebugger = gPanel.panelWin;
+    gEditor = gDebugger.DebuggerView.editor;
+    gSources = gDebugger.DebuggerView.Sources;
+
+    reloadActiveTab(gPanel, gDebugger.EVENTS.SOURCES_ADDED)
+      .then(testSourcesEmptyText)
+      .then(() => closeDebuggerAndFinish(gPanel))
+      .then(null, aError => {
+        ok(false, "Got an error: " + aError.message + "\n" + aError.stack);
+      });
+  });
+}
+
+function testSourcesEmptyText() {
+    is(gSources.itemCount, 0,
+      "Found no entries in the sources widget.");
+
+    is(gEditor.getText().length, 0,
+      "The source editor should not have any text displayed.");
+
+    is(gDebugger.document.querySelector("#sources .side-menu-widget-empty-text").getAttribute("value"),
+       gDebugger.L10N.getStr("noSourcesText"),
+      "The sources widget should now display 'This page has no sources'.");
+}
+
+registerCleanupFunction(function() {
+  gTab = null;
+  gDebuggee = null;
+  gPanel = null;
+  gDebugger = null;
+  gEditor = null;
+  gSources = null;
+});