1 files changed, 45 insertions, 0 deletions
diff --git a/accessible/tests/browser/mac/browser_aria_expanded.js b/accessible/tests/browser/mac/browser_aria_expanded.js
new file mode 100644
index 0000000000..48fb615266
--- /dev/null
+++ b/accessible/tests/browser/mac/browser_aria_expanded.js
@@ -0,0 +1,45 @@
+/* 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/. */
+
+"use strict";
+
+/* import-globals-from ../../mochitest/states.js */
+loadScripts({ name: "states.js", dir: MOCHITESTS_DIR });
+
+// Test aria-expanded on a button
+addAccessibleTask(
+  `hello world<br>
+  <button aria-expanded="false" id="b">I am a button</button><br>
+  goodbye`,
+  async (browser, accDoc) => {
+    let button = getNativeInterface(accDoc, "b");
+    is(button.getAttributeValue("AXExpanded"), 0, "button is not expanded");
+
+    let stateChanged = Promise.all([
+      waitForStateChange("b", STATE_EXPANDED, true),
+      waitForStateChange("b", STATE_COLLAPSED, false),
+    ]);
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document
+        .getElementById("b")
+        .setAttribute("aria-expanded", "true");
+    });
+    await stateChanged;
+    is(button.getAttributeValue("AXExpanded"), 1, "button is expanded");
+
+    stateChanged = Promise.all([
+      waitForStateChange("b", STATE_EXPANDED, false),
+      waitForStateChange("b", EXT_STATE_EXPANDABLE, false, true),
+    ]);
+    await SpecialPowers.spawn(browser, [], () => {
+      content.document.getElementById("b").removeAttribute("aria-expanded");
+    });
+    await stateChanged;
+
+    ok(
+      !button.attributeNames.includes("AXExpanded"),
+      "button has no expanded attr"
+    );
+  }
+);