1 files changed, 45 insertions, 0 deletions
diff --git a/testing/web-platform/tests/screen-orientation/fullscreen-interactions.html b/testing/web-platform/tests/screen-orientation/fullscreen-interactions.html
new file mode 100644
index 0000000000..b1ac1c7000
--- /dev/null
+++ b/testing/web-platform/tests/screen-orientation/fullscreen-interactions.html
@@ -0,0 +1,45 @@
+<!DOCTYPE html>
+<meta charset="utf-8" />
+<meta viewport="width=device-width, initial-scale=1" />
+<script src="/resources/testharness.js"></script>
+<script src="/resources/testharnessreport.js"></script>
+<script src="/resources/testdriver.js"></script>
+<script src="/resources/testdriver-vendor.js"></script>
+<body></body>
+<script type="module">
+  import {
+    getOppositeOrientation,
+    attachIframe,
+    makeCleanup,
+  } from "./resources/orientation-utils.js";
+
+  promise_test(async (t) => {
+    t.add_cleanup(makeCleanup());
+    await test_driver.bless("request full screen");
+    await document.documentElement.requestFullscreen();
+    const currentOrientation = screen.orientation.type;
+    await screen.orientation.lock(
+      getOppositeOrientation()
+    );
+  }, "fullscreen and orientation support");
+
+  promise_test(async (t) => {
+    const iframe = await attachIframe();
+    t.add_cleanup(makeCleanup(iframe));
+    const iframeWindow = iframe.contentWindow;
+    await test_driver.bless("request full screen");
+    await document.documentElement.requestFullscreen();
+    const currentOrientation = window.screen.orientation.type;
+    const lockPromise = iframeWindow.screen.orientation.lock(
+      getOppositeOrientation()
+    );
+    const fsExitPromise = document.exitFullscreen();
+    await promise_rejects_dom(
+      t,
+      "SecurityError",
+      iframeWindow.DOMException,
+      lockPromise
+    );
+    await fsExitPromise;
+  }, "Iframe can't itself know if it's parent is fullscreen when changing orientation");
+</script>