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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 math
import uuid
from asyncio.tasks import Task
from typing import Any, Callable, List, Tuple, Union
from pyee import EventEmitter
from playwright._impl._connection import ChannelOwner
from playwright._impl._errors import Error, TimeoutError
class Waiter:
def __init__(self, channel_owner: ChannelOwner, event: str) -> None:
self._result: asyncio.Future = asyncio.Future()
self._wait_id = uuid.uuid4().hex
self._loop = channel_owner._loop
self._pending_tasks: List[Task] = []
self._channel = channel_owner._channel
self._registered_listeners: List[Tuple[EventEmitter, str, Callable]] = []
self._logs: List[str] = []
self._wait_for_event_info_before(self._wait_id, event)
def _wait_for_event_info_before(self, wait_id: str, event: str) -> None:
self._channel.send_no_reply(
"waitForEventInfo",
None,
{
"info": {
"waitId": wait_id,
"phase": "before",
"event": event,
}
},
)
def _wait_for_event_info_after(self, wait_id: str, error: Exception = None) -> None:
self._channel._connection.wrap_api_call_sync(
lambda: self._channel.send_no_reply(
"waitForEventInfo",
None,
{
"info": {
"waitId": wait_id,
"phase": "after",
**({"error": str(error)} if error else {}),
},
},
),
True,
)
def reject_on_event(
self,
emitter: EventEmitter,
event: str,
error: Union[Error, Callable[..., Error]],
predicate: Callable = None,
) -> None:
def listener(event_data: Any = None) -> None:
if not predicate or predicate(event_data):
self._reject(error() if callable(error) else error)
emitter.on(event, listener)
self._registered_listeners.append((emitter, event, listener))
def reject_on_timeout(self, timeout: float, message: str) -> None:
if timeout == 0:
return
async def reject() -> None:
await asyncio.sleep(timeout / 1000)
self._reject(TimeoutError(message))
self._pending_tasks.append(self._loop.create_task(reject()))
def _cleanup(self) -> None:
for task in self._pending_tasks:
if not task.done():
task.cancel()
for listener in self._registered_listeners:
listener[0].remove_listener(listener[1], listener[2])
def _fulfill(self, result: Any) -> None:
self._cleanup()
if not self._result.done():
self._result.set_result(result)
self._wait_for_event_info_after(self._wait_id)
def _reject(self, exception: Exception) -> None:
self._cleanup()
if exception:
base_class = TimeoutError if isinstance(exception, TimeoutError) else Error
exception = base_class(str(exception) + format_log_recording(self._logs))
if not self._result.done():
self._result.set_exception(exception)
self._wait_for_event_info_after(self._wait_id, exception)
def wait_for_event(
self,
emitter: EventEmitter,
event: str,
predicate: Callable = None,
) -> None:
def listener(event_data: Any = None) -> None:
if not predicate or predicate(event_data):
self._fulfill(event_data)
emitter.on(event, listener)
self._registered_listeners.append((emitter, event, listener))
def result(self) -> asyncio.Future:
return self._result
def log(self, message: str) -> None:
self._logs.append(message)
try:
self._channel._connection.wrap_api_call_sync(
lambda: self._channel.send_no_reply(
"waitForEventInfo",
None,
{
"info": {
"waitId": self._wait_id,
"phase": "log",
"message": message,
},
},
),
True,
)
except Exception:
pass
def throw_on_timeout(timeout: float, exception: Exception) -> asyncio.Task:
async def throw() -> None:
await asyncio.sleep(timeout / 1000)
raise exception
return asyncio.create_task(throw())
def format_log_recording(log: List[str]) -> str:
if not log:
return ""
header = " logs "
header_length = 60
left_length = math.floor((header_length - len(header)) / 2)
right_length = header_length - len(header) - left_length
new_line = "\n"
return f"{new_line}{'=' * left_length}{header}{'=' * right_length}{new_line}{new_line.join(log)}{new_line}{'=' * header_length}"
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