Bug 1947402 - [wdspec] Add wdspec test for performActions hiding iframe with display none r=webdriver-reviewers,whimboo

Depends on D247042

Differential Revision: https://phabricator.services.mozilla.com/D238910

testing/web-platform/mozilla/tests/webdriver/bidi/input/perform_actions/pointer_mouse.py

@@ -0,0 +1,66 @@
+import pytest
+from webdriver.bidi.modules.input import Actions, get_element_origin
+
+pytestmark = pytest.mark.asyncio
+
+
+async def test_click_in_display_none_frame(
+    bidi_session, top_context, get_element, inline
+):
+    frame_url = inline(
+        """
+        <button>click to hide</button>
+        <script type="text/javascript">
+            const btn = document.querySelector('button');
+            btn.addEventListener('click', ev => {
+                window.parent.postMessage("test");
+            });
+        </script>
+        """
+    )
+
+    url = inline(
+        f"""
+        <div id="content">
+            <iframe src='{frame_url}'></iframe>
+        </div>
+        <script>
+            window.addEventListener("message", ev => {{
+                document.querySelector("iframe").style.display = "none";
+            }}, false);
+        </script>
+        """
+    )
+
+    await bidi_session.browsing_context.navigate(
+        context=top_context["context"],
+        url=url,
+        wait="complete",
+    )
+
+    all_contexts = await bidi_session.browsing_context.get_tree(
+        root=top_context["context"]
+    )
+    frame_context = all_contexts[0]["children"][0]
+
+    button = await get_element("button", context=frame_context)
+
+    actions = Actions()
+    (
+        actions.add_pointer()
+        .pointer_move(x=0, y=0, origin=get_element_origin(button))
+        .pointer_down(button=0)
+        .pointer_up(button=0)
+        .pause(100)
+    )
+
+    # Firefox bug:
+    # - the click will hide the iframe via display none
+    # - the last bit of performActions tries to wait for animationFrame in the
+    #   iframe browsing context, but since it's hidden there won't be any and
+    #   we never resolve
+    # Note that the pause(100) is not strictly necessary to reproduce the issue
+    # but it makes it fail consistently. Otherwise it's very much intermittent.
+    await bidi_session.input.perform_actions(
+        actions=actions, context=frame_context["context"]
+    )

testing/web-platform/mozilla/tests/webdriver/classic/perform_actions/pointer_mouse.py

@@ -0,0 +1,51 @@
+import pytest
+
+pytestmark = pytest.mark.asyncio
+
+
+async def test_click_in_display_none_frame(session, inline):
+    frame_url = inline(
+        """
+        <button>click to hide</button>
+        <script type="text/javascript">
+            const btn = document.querySelector('button');
+            btn.addEventListener('click', ev => {
+                window.parent.postMessage("test");
+            });
+        </script>
+        """
+    )
+
+    url = inline(
+        f"""
+        <div id="content">
+            <iframe src='{frame_url}'></iframe>
+        </div>
+        <script>
+            window.addEventListener("message", ev => {{
+                document.querySelector("iframe").style.display = "none";
+            }}, false);
+        </script>
+        """
+    )
+
+    session.url = url
+
+    frame = session.find.css("iframe", all=False)
+    session.switch_frame(frame)
+    button = session.find.css("button", all=False)
+
+    mouse_chain = session.actions.sequence(
+        "pointer", "pointer_id", {"pointerType": "mouse"}
+    )
+
+    # Firefox bug:
+    # - the click will hide the iframe via display none
+    # - the last bit of performActions tries to wait for animationFrame in the
+    #   iframe browsing context, but since it's hidden there won't be any and
+    #   we never resolve
+    # Note that the pause(100) is not strictly necessary to reproduce the issue
+    # but it makes it fail consistently. Otherwise it's very much intermittent.
+    mouse_chain.pointer_move(0, 0, origin=button).pointer_down().pointer_up().pause(
+        100
+    ).perform()