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# Copyright (c) Microsoft Corporation.
#
# Licensed under the Apache License, Version 2.0 (the "License");
# you may not use this file except in compliance with the License.
# You may obtain a copy of the License at
#
# http://www.apache.org/licenses/LICENSE-2.0
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
import asyncio
import gc
import sys
from typing import Dict
import pytest
from playwright.async_api import Page, async_playwright
from tests.server import Server
from tests.utils import TARGET_CLOSED_ERROR_MESSAGE
async def test_should_cancel_underlying_protocol_calls(
browser_name: str, launch_arguments: Dict
) -> None:
handler_exception = None
def exception_handlerdler(loop: asyncio.AbstractEventLoop, context: Dict) -> None:
nonlocal handler_exception
handler_exception = context["exception"]
asyncio.get_running_loop().set_exception_handler(exception_handlerdler)
async with async_playwright() as p:
browser = await p[browser_name].launch(**launch_arguments)
page = await browser.new_page()
task = asyncio.create_task(page.wait_for_selector("will-never-find"))
# make sure that the wait_for_selector message was sent to the server (driver)
await asyncio.sleep(0.1)
task.cancel()
with pytest.raises(asyncio.CancelledError):
await task
await browser.close()
# The actual 'Future exception was never retrieved' is logged inside the Future destructor (__del__).
gc.collect()
assert handler_exception is None
asyncio.get_running_loop().set_exception_handler(None)
async def test_async_playwright_stop_multiple_times() -> None:
playwright = await async_playwright().start()
await playwright.stop()
await playwright.stop()
async def test_cancel_pending_protocol_call_on_playwright_stop(server: Server) -> None:
server.set_route("/hang", lambda _: None)
playwright = await async_playwright().start()
api_request_context = await playwright.request.new_context()
pending_task = asyncio.create_task(api_request_context.get(server.PREFIX + "/hang"))
await playwright.stop()
with pytest.raises(Exception) as exc_info:
await pending_task
assert TARGET_CLOSED_ERROR_MESSAGE in str(exc_info.value)
async def test_should_not_throw_with_taskgroup(page: Page) -> None:
if sys.version_info < (3, 11):
pytest.skip("TaskGroup is only available in Python 3.11+")
from builtins import ExceptionGroup # type: ignore
async def raise_exception() -> None:
raise ValueError("Something went wrong")
with pytest.raises(ExceptionGroup) as exc_info:
async with asyncio.TaskGroup() as group: # type: ignore
group.create_task(page.locator(".this-element-does-not-exist").inner_text())
group.create_task(raise_exception())
assert len(exc_info.value.exceptions) == 1
assert "Something went wrong" in str(exc_info.value.exceptions[0])
assert isinstance(exc_info.value.exceptions[0], ValueError)
assert await page.evaluate("() => 11 * 11") == 121
async def test_should_return_proper_api_name_on_error(page: Page) -> None:
try:
await page.evaluate("does_not_exist")
assert (
False
), "Accessing undefined JavaScript variable should have thrown exception"
except Exception as error:
# Each browser returns slightly different error messages, but they should all start with "Page.evaluate:", because that was the Playwright method where the error originated
assert str(error).startswith("Page.evaluate:")
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