Bug 1978027 - [wdspec] Add tests for timezone override in sandboxes. r=webdriver-reviewers,jdescottes

Differential Revision: https://phabricator.services.mozilla.com/D261392

Author: lutien

testing/web-platform/meta/webdriver/tests/bidi/emulation/set_timezone_override/contexts.py.ini

@@ -0,0 +1,4 @@
+[contexts.py]
+  [test_timezone_override_applies_to_existing_sandbox]
+    bug: https://bugzilla.mozilla.org/show_bug.cgi?id=1983807
+    expected: FAIL

testing/web-platform/tests/webdriver/tests/bidi/emulation/set_timezone_override/conftest.py

@@ -10,10 +10,10 @@
 
 @pytest_asyncio.fixture
 async def get_current_timezone(bidi_session):
-    async def get_current_timezone(context):
+    async def get_current_timezone(context, sandbox=None):
         result = await bidi_session.script.evaluate(
             expression="Intl.DateTimeFormat().resolvedOptions().timeZone",
-            target=ContextTarget(context["context"]),
+            target=ContextTarget(context["context"], sandbox=sandbox),
             await_promise=False,
         )
         return result["value"]

testing/web-platform/tests/webdriver/tests/bidi/emulation/set_timezone_override/contexts.py

@@ -1,4 +1,5 @@
 import pytest
+from webdriver.bidi.modules.script import ContextTarget
 
 pytestmark = pytest.mark.asyncio
 
@@ -92,3 +93,34 @@ async def test_iframe(
 
     # Assert timezone is emulated in the iframe context.
     assert await get_current_timezone(iframe) == another_timezone
+
+
+async def test_timezone_override_applies_to_new_sandbox(
+    bidi_session, new_tab, some_timezone, get_current_timezone
+):
+    await bidi_session.emulation.set_timezone_override(
+        contexts=[new_tab["context"]], timezone=some_timezone
+    )
+
+    # Make sure the override got applied to the newly created sandbox.
+    assert await get_current_timezone(new_tab, "test") == some_timezone
+
+
+async def test_timezone_override_applies_to_existing_sandbox(
+    bidi_session,
+    new_tab,
+    default_timezone,
+    another_timezone,
+    get_current_timezone
+):
+    sandbox_name = "test"
+
+    # Create a sandbox.
+    assert await get_current_timezone(new_tab, sandbox_name) == default_timezone
+
+    await bidi_session.emulation.set_timezone_override(
+        contexts=[new_tab["context"]], timezone=another_timezone
+    )
+
+    # Make sure the override got applied to the existing sandbox.
+    assert await get_current_timezone(new_tab, sandbox_name) == another_timezone