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Test Info:

import pytest
from tests.support.classic.asserts import assert_error
def get_alert_text(session):
return session.transport.send("GET", f"session/{session.session_id}/alert/text")
# To minimize Firefox restarts, run tests requiring system access first,
# followed by those that don't; so only one restart is needed.
@pytest.mark.geckodriver(allow_system_access=True)
def test_parent_process_context_with_system_access(session):
session.url = "about:about"
response = get_alert_text(session)
assert_error(response, "no such alert")
def test_parent_process_context_without_system_access(parent_process_session):
response = get_alert_text(parent_process_session)
assert_error(response, "unsupported operation")
def test_extension_context_without_system_access(session, install_new_tab_extension):
handle, _ = install_new_tab_extension
session.window_handle = handle
assert session.url.startswith("moz-extension://")
response = get_alert_text(session)
assert_error(response, "unsupported operation")