diff -r 000000000000 -r 6474c204b198 browser/base/content/test/general/browser_bug556061.js
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/browser/base/content/test/general/browser_bug556061.js	Wed Dec 31 06:09:35 2014 +0100
@@ -0,0 +1,96 @@
+/* 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/. */
+
+let testURL = "http://example.org/browser/browser/base/content/test/general/dummy_page.html";
+let testActionURL = "moz-action:switchtab," + testURL;
+testURL = gURLBar.trimValue(testURL);
+let testTab;
+
+function runNextTest() {
+  if (tests.length) {
+    let t = tests.shift();
+    waitForClipboard(t.expected, t.setup, function() {
+      t.success();
+      runNextTest();
+    }, cleanup);
+  }
+  else {
+    cleanup();
+  }
+}
+
+function cleanup() {
+  gBrowser.removeTab(testTab);
+  finish();
+}
+
+let tests = [
+  {
+    expected: testURL,
+    setup: function() {
+      gURLBar.value = testActionURL;
+      gURLBar.valueIsTyped = true;
+      is(gURLBar.value, testActionURL, "gURLBar.value starts with correct value");
+
+      // Focus the urlbar so we can select it all & copy
+      gURLBar.focus();
+      gURLBar.select();
+      goDoCommand("cmd_copy");
+    },
+    success: function() {
+      is(gURLBar.value, testActionURL, "gURLBar.value didn't change when copying");
+    }
+  },
+  {
+    expected: testURL.substring(0, 10),
+    setup: function() {
+      // Set selectionStart/End manually and make sure it matches the substring
+      gURLBar.selectionStart = 0;
+      gURLBar.selectionEnd = 10;
+      goDoCommand("cmd_copy");
+    },
+    success: function() {
+      is(gURLBar.value, testActionURL, "gURLBar.value didn't change when copying");
+    }
+  },
+  {
+    expected: testURL,
+    setup: function() {
+      // Setup for cut test...
+      // Select all
+      gURLBar.select();
+      goDoCommand("cmd_cut");
+    },
+    success: function() {
+      is(gURLBar.value, "", "gURLBar.value is now empty");
+    }
+  },
+  {
+    expected: testURL.substring(testURL.length - 10, testURL.length),
+    setup: function() {
+      // Reset urlbar value
+      gURLBar.value = testActionURL;
+      gURLBar.valueIsTyped = true;
+      // Sanity check that we have the right value
+      is(gURLBar.value, testActionURL, "gURLBar.value starts with correct value");
+
+      // Now just select part of the value & cut that.
+      gURLBar.selectionStart = testURL.length - 10;
+      gURLBar.selectionEnd = testURL.length;
+      goDoCommand("cmd_cut");
+    },
+    success: function() {
+      is(gURLBar.value, testURL.substring(0, testURL.length - 10), "gURLBar.value has the correct value");
+    }
+  }
+];
+
+function test() {
+  waitForExplicitFinish();
+  testTab = gBrowser.addTab();
+  gBrowser.selectedTab = testTab;
+
+  // Kick off the testing
+  runNextTest();
+}