1 files changed, 68 insertions, 0 deletions
diff --git a/dom/browser-element/mochitest/browserElement_Titlechange.js b/dom/browser-element/mochitest/browserElement_Titlechange.js
new file mode 100644
index 000000000..78c939ad8
--- /dev/null
+++ b/dom/browser-element/mochitest/browserElement_Titlechange.js
@@ -0,0 +1,68 @@
+/* Any copyright is dedicated to the public domain.
+   http://creativecommons.org/publicdomain/zero/1.0/ */
+
+// Test that the onmozbrowsertitlechange event works.
+"use strict";
+
+SimpleTest.waitForExplicitFinish();
+browserElementTestHelpers.setEnabledPref(true);
+browserElementTestHelpers.addPermission();
+
+function runTest() {
+  var iframe1 = document.createElement('iframe');
+  iframe1.setAttribute('mozbrowser', 'true');
+  document.body.appendChild(iframe1);
+
+  // iframe2 is a red herring; we modify its title but don't listen for
+  // titlechanges; we want to make sure that its titlechange events aren't
+  // picked up by the listener on iframe1.
+  var iframe2 = document.createElement('iframe');
+  iframe2.setAttribute('mozbrowser', 'true');
+  document.body.appendChild(iframe2);
+
+  // iframe3 is another red herring.  It's not a mozbrowser, so we shouldn't
+  // get any titlechange events on it.
+  var iframe3 = document.createElement('iframe');
+  document.body.appendChild(iframe3);
+
+  var numTitleChanges = 0;
+
+  iframe1.addEventListener('mozbrowsertitlechange', function(e) {
+    // Ignore empty titles; these come from about:blank.
+    if (e.detail == '')
+      return;
+
+    numTitleChanges++;
+
+    if (numTitleChanges == 1) {
+      is(e.detail, 'Title');
+      SpecialPowers.getBrowserFrameMessageManager(iframe1)
+                   .loadFrameScript("data:,content.document.title='New title';",
+                                    /* allowDelayedLoad = */ false);
+      SpecialPowers.getBrowserFrameMessageManager(iframe2)
+                   .loadFrameScript("data:,content.document.title='BAD TITLE 2';",
+                                    /* allowDelayedLoad = */ false);
+    }
+    else if (numTitleChanges == 2) {
+      is(e.detail, 'New title');
+      iframe1.src = 'data:text/html,<html><head><title>Title 3</title></head><body></body></html>';
+    }
+    else if (numTitleChanges == 3) {
+      is(e.detail, 'Title 3');
+      SimpleTest.finish();
+    }
+    else {
+      ok(false, 'Too many titlechange events.');
+    }
+  });
+
+  iframe3.addEventListener('mozbrowsertitlechange', function(e) {
+    ok(false, 'Should not get a titlechange event for iframe3.');
+  });
+
+  iframe1.src = 'data:text/html,<html><head><title>Title</title></head><body></body></html>';
+  iframe2.src = 'data:text/html,<html><head><title>BAD TITLE</title></head><body></body></html>';
+  iframe3.src = 'data:text/html,<html><head><title>SHOULD NOT GET EVENT</title></head><body></body></html>';
+}
+
+addEventListener('testready', runTest);