1 files changed, 37 insertions, 0 deletions
diff --git a/dom/tests/browser/browser_autofocus_background.js b/dom/tests/browser/browser_autofocus_background.js
new file mode 100644
index 000000000..8523ec047
--- /dev/null
+++ b/dom/tests/browser/browser_autofocus_background.js
@@ -0,0 +1,37 @@
+add_task(function* () {
+  let tabs = [ gBrowser.selectedTab, gBrowser.addTab() ];
+
+  // The first tab has an autofocused element.
+  // The second tab is exactly like the first one without the autofocus.
+  let testingList = [
+    { uri: "data:text/html,<!DOCTYPE html><html><body><input autofocus id='target'></body></html>",
+      tagName: "INPUT"},
+  ];
+
+  // Set the focus to the first tab.
+  tabs[0].linkedBrowser.focus();
+
+  // Load the second tab in the background.
+  let loadedPromise = BrowserTestUtils.browserLoaded(tabs[1].linkedBrowser);
+  tabs[1].linkedBrowser.loadURI(testingList[0].uri);
+  yield loadedPromise;
+
+  for (var i = 0; i < testingList.length; ++i) {
+    // Get active element in the tab.
+    let tagName = yield ContentTask.spawn(tabs[i + 1].linkedBrowser, null, function* () {
+      return content.document.activeElement.tagName;
+    });
+
+    is(tagName, testingList[i].tagName,
+       "The background tab's focused element should be " + testingList[i].tagName);
+  }
+
+  is(document.activeElement, tabs[0].linkedBrowser,
+     "The background tab's focused element should not cause the tab to be focused");
+
+  // Cleaning up.
+  for (let i = 1; i < tabs.length; i++) {
+    yield BrowserTestUtils.removeTab(tabs[i]);
+  }
+});
+