diff -r 000000000000 -r 6474c204b198 browser/devtools/scratchpad/test/browser_scratchpad_goto_line_ui.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/devtools/scratchpad/test/browser_scratchpad_goto_line_ui.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,43 @@
+/* vim: set ts=2 et sw=2 tw=80: */
+/* Any copyright is dedicated to the Public Domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+/* Bug 714942 */
+
+function test()
+{
+  waitForExplicitFinish();
+
+  gBrowser.selectedTab = gBrowser.addTab();
+  gBrowser.selectedBrowser.addEventListener("load", function browserLoad() {
+    gBrowser.selectedBrowser.removeEventListener("load", browserLoad, true);
+    openScratchpad(runTests);
+  }, true);
+
+  content.location = "data:text/html,<p>test the 'Jump to line' feature in Scratchpad";
+}
+
+function runTests(aWindow, aScratchpad)
+{
+  let editor = aScratchpad.editor;
+  let text = "foobar bug650345\nBug650345 bazbaz\nfoobar omg\ntest";
+  editor.setText(text);
+  editor.setCursor({ line: 0, ch: 0 });
+
+  let oldPrompt = editor.openDialog;
+  let desiredValue;
+
+  editor.openDialog = function (text, cb) {
+    cb(desiredValue);
+  };
+
+  desiredValue = 3;
+  EventUtils.synthesizeKey("J", {accelKey: true}, aWindow);
+  is(editor.getCursor().line, 2, "line is correct");
+
+  desiredValue = 2;
+  aWindow.goDoCommand("cmd_gotoLine")
+  is(editor.getCursor().line, 1, "line is correct (again)");
+
+  editor.openDialog = oldPrompt;
+  finish();
+}