1 files changed, 56 insertions, 0 deletions
diff --git a/testing/web-platform/tests/screen-orientation/unlock.html b/testing/web-platform/tests/screen-orientation/unlock.html
new file mode 100644
index 0000000000..d5f32eb7be
--- /dev/null
+++ b/testing/web-platform/tests/screen-orientation/unlock.html
@@ -0,0 +1,56 @@
+<!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>
+<script type="module">
+  import {
+    getOppositeOrientation,
+    makeCleanup,
+    attachIframe,
+  } from "./resources/orientation-utils.js";
+
+  test(() => {
+    screen.orientation.unlock();
+  }, "unlock() doesn't throw when there is no lock");
+
+  test(() => {
+    const value = screen.orientation.unlock();
+    assert_equals(value, undefined);
+  }, "unlock() returns a void value");
+
+  promise_test(async (t) => {
+    t.add_cleanup(makeCleanup());
+    await test_driver.bless("request full screen");
+    await document.documentElement.requestFullscreen();
+    screen.orientation.unlock();
+  }, "unlock() doesn't throw when there is no lock with fullscreen");
+
+  promise_test(async (t) => {
+    t.add_cleanup(makeCleanup());
+    await test_driver.bless("request full screen");
+    await document.documentElement.requestFullscreen();
+    const promise = screen.orientation.lock(getOppositeOrientation());
+    screen.orientation.unlock();
+    await promise_rejects_dom(t, "AbortError", promise);
+  }, "unlock() aborts a pending lock request");
+
+  promise_test(async (t) => {
+    t.add_cleanup(makeCleanup());
+    await test_driver.bless("request full screen");
+    await document.documentElement.requestFullscreen();
+    const iframe = await attachIframe();
+    const promise = iframe.contentWindow.screen.orientation.lock(
+      getOppositeOrientation()
+    );
+    screen.orientation.unlock();
+    await promise_rejects_dom(
+      t,
+      "AbortError",
+      iframe.contentWindow.DOMException,
+      promise
+    );
+  }, "unlock() aborts a pending lock request across documents");
+</script>