1 files changed, 35 insertions, 0 deletions
diff --git a/accessible/tests/browser/e10s/browser_events_hide.js b/accessible/tests/browser/e10s/browser_events_hide.js
new file mode 100644
index 000000000..bb9ee3961
--- /dev/null
+++ b/accessible/tests/browser/e10s/browser_events_hide.js
@@ -0,0 +1,35 @@
+/* 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/. */
+
+/* global EVENT_HIDE */
+
+'use strict';
+
+/**
+ * Test hide event and its interface:
+ *   - targetParent
+ *   - targetNextSibling
+ *   - targetPrevSibling
+ */
+addAccessibleTask(`
+  <div id="parent">
+    <div id="previous"></div>
+    <div id="to-hide"></div>
+    <div id="next"></div>
+  </div>`,
+  function*(browser, accDoc) {
+    let acc = findAccessibleChildByID(accDoc, 'to-hide');
+    let onHide = waitForEvent(EVENT_HIDE, acc);
+    yield invokeSetStyle(browser, 'to-hide', 'visibility', 'hidden');
+    let event = yield onHide;
+    let hideEvent = event.QueryInterface(Ci.nsIAccessibleHideEvent);
+
+    is(getAccessibleDOMNodeID(hideEvent.targetParent), 'parent',
+      'Correct target parent.');
+    is(getAccessibleDOMNodeID(hideEvent.targetNextSibling), 'next',
+      'Correct target next sibling.');
+    is(getAccessibleDOMNodeID(hideEvent.targetPrevSibling), 'previous',
+      'Correct target previous sibling.');
+  }
+);