1 files changed, 45 insertions, 0 deletions
diff --git a/dom/tests/browser/browser_focus_steal_from_chrome_during_mousedown.js b/dom/tests/browser/browser_focus_steal_from_chrome_during_mousedown.js
new file mode 100644
index 000000000..a21240872
--- /dev/null
+++ b/dom/tests/browser/browser_focus_steal_from_chrome_during_mousedown.js
@@ -0,0 +1,45 @@
+add_task(function* test() {
+  const kTestURI =
+    "data:text/html," +
+    "<script type=\"text/javascript\">" +
+    "  function onMouseDown(aEvent) {" +
+    "    document.getElementById('willBeFocused').focus();" +
+    "    aEvent.preventDefault();" +
+    "  }" +
+    "</script>" +
+    "<body id=\"body\">" +
+    "<button onmousedown=\"onMouseDown(event);\" style=\"width: 100px; height: 100px;\">click here</button>" +
+    "<input id=\"willBeFocused\"></body>";
+
+  let tab = yield BrowserTestUtils.openNewForegroundTab(gBrowser, kTestURI);
+
+  let fm = Components.classes["@mozilla.org/focus-manager;1"].
+        getService(Components.interfaces.nsIFocusManager);
+
+  for (var button = 0; button < 3; button++) {
+    // Set focus to a chrome element before synthesizing a mouse down event.
+    document.getElementById("urlbar").focus();
+
+    is(fm.focusedElement, document.getElementById("urlbar").inputField,
+       "Failed to move focus to search bar: button=" + button);
+
+    // Synthesize mouse down event on browser object over the button, such that
+    // the event propagates through both processes.
+    EventUtils.synthesizeMouse(tab.linkedBrowser, 20, 20, { "button": button }, null);
+
+    isnot(fm.focusedElement, document.getElementById("urlbar").inputField,
+       "Failed to move focus away from search bar: button=" + button);
+
+    yield ContentTask.spawn(tab.linkedBrowser, button, function (button) {
+      let fm = Components.classes["@mozilla.org/focus-manager;1"].
+            getService(Components.interfaces.nsIFocusManager);
+
+      Assert.equal(content.document.activeElement.id, "willBeFocused",
+                   "The input element isn't active element: button=" + button);
+      Assert.equal(fm.focusedElement, content.document.activeElement,
+                   "The active element isn't focused element in App level: button=" + button);
+    });
+  }
+
+  gBrowser.removeTab(tab);
+});