1 files changed, 70 insertions, 0 deletions
diff --git a/accessible/tests/browser/fission/browser_hidden_iframe.js b/accessible/tests/browser/fission/browser_hidden_iframe.js
new file mode 100644
index 0000000000..61414b611d
--- /dev/null
+++ b/accessible/tests/browser/fission/browser_hidden_iframe.js
@@ -0,0 +1,70 @@
+/* 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 */
+/* import-globals-from ../../mochitest/role.js */
+loadScripts({ name: "states.js", dir: MOCHITESTS_DIR });
+loadScripts({ name: "role.js", dir: MOCHITESTS_DIR });
+
+addAccessibleTask(
+  `<input id="textbox" value="hello"/>`,
+  async function (browser, contentDocAcc) {
+    info(
+      "Check that the IFRAME and the IFRAME document are not accessible initially."
+    );
+    let iframeAcc = findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID);
+    let iframeDocAcc = findAccessibleChildByID(
+      contentDocAcc,
+      DEFAULT_IFRAME_DOC_BODY_ID
+    );
+    ok(!iframeAcc, "IFRAME is hidden and should not be accessible");
+    ok(!iframeDocAcc, "IFRAME document is hidden and should not be accessible");
+
+    info(
+      "Show the IFRAME and check that it's now available in the accessibility tree."
+    );
+
+    const events = [[EVENT_REORDER, contentDocAcc]];
+
+    const onEvents = waitForEvents(events);
+    await SpecialPowers.spawn(browser, [DEFAULT_IFRAME_ID], contentId => {
+      content.document.getElementById(contentId).style.display = "";
+    });
+    await onEvents;
+
+    iframeAcc = findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_ID);
+    ok(!isDefunct(iframeAcc), "IFRAME should be accessible");
+
+    // Wait for the child iframe to layout itself. This can happen during or
+    // after the reorder event, depending on timing.
+    iframeDocAcc = await TestUtils.waitForCondition(() => {
+      return findAccessibleChildByID(contentDocAcc, DEFAULT_IFRAME_DOC_BODY_ID);
+    });
+
+    is(iframeAcc.childCount, 1, "IFRAME accessible should have a single child");
+    ok(iframeDocAcc, "IFRAME document exists");
+    ok(!isDefunct(iframeDocAcc), "IFRAME document should be accessible");
+    is(
+      iframeAcc.firstChild,
+      iframeDocAcc,
+      "An accessible for a IFRAME document is the child of the IFRAME accessible"
+    );
+    is(
+      iframeDocAcc.parent,
+      iframeAcc,
+      "IFRAME document's parent matches the IFRAME."
+    );
+  },
+  {
+    topLevel: false,
+    iframe: true,
+    remoteIframe: true,
+    iframeAttrs: {
+      style: "display: none;",
+    },
+    skipFissionDocLoad: true,
+  }
+);