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gpt4free/venv/lib/python3.9/site-packages/streamlit/testing/local_script_runner.py

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5.2 KiB
Python

# Copyright (c) Streamlit Inc. (2018-2022) Snowflake Inc. (2022)
#
# 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.
from __future__ import annotations
import os
import time
from copy import deepcopy
from typing import Any
from streamlit.proto.ClientState_pb2 import ClientState
from streamlit.proto.ForwardMsg_pb2 import ForwardMsg
from streamlit.proto.WidgetStates_pb2 import WidgetStates
from streamlit.runtime.forward_msg_queue import ForwardMsgQueue
from streamlit.runtime.scriptrunner import RerunData, ScriptRunner, ScriptRunnerEvent
from streamlit.runtime.state.session_state import SessionState
from streamlit.runtime.uploaded_file_manager import UploadedFileManager
from streamlit.testing.element_tree import ElementTree, parse_tree_from_messages
class LocalScriptRunner(ScriptRunner):
"""Subclasses ScriptRunner to provide some testing features."""
def __init__(
self,
script_path: str,
prev_session_state: SessionState | None = None,
):
"""Initializes the ScriptRunner for the given script_name"""
assert os.path.isfile(script_path), f"File not found at {script_path}"
self.forward_msg_queue = ForwardMsgQueue()
self.script_path = script_path
if prev_session_state is not None:
self.session_state = deepcopy(prev_session_state)
else:
self.session_state = SessionState()
super().__init__(
session_id="test session id",
main_script_path=script_path,
client_state=ClientState(),
session_state=self.session_state,
uploaded_file_mgr=UploadedFileManager(),
initial_rerun_data=RerunData(),
user_info={"email": "test@test.com"},
)
# Accumulates uncaught exceptions thrown by our run thread.
self.script_thread_exceptions: list[BaseException] = []
# Accumulates all ScriptRunnerEvents emitted by us.
self.events: list[ScriptRunnerEvent] = []
self.event_data: list[Any] = []
def record_event(
sender: ScriptRunner | None, event: ScriptRunnerEvent, **kwargs
) -> None:
# Assert that we're not getting unexpected `sender` params
# from ScriptRunner.on_event
assert (
sender is None or sender == self
), "Unexpected ScriptRunnerEvent sender!"
self.events.append(event)
self.event_data.append(kwargs)
# Send ENQUEUE_FORWARD_MSGs to our queue
if event == ScriptRunnerEvent.ENQUEUE_FORWARD_MSG:
forward_msg = kwargs["forward_msg"]
self.forward_msg_queue.enqueue(forward_msg)
self.on_event.connect(record_event, weak=False)
def join(self) -> None:
"""Wait for the script thread to finish, if it is running."""
if self._script_thread is not None:
self._script_thread.join()
def forward_msgs(self) -> list[ForwardMsg]:
"""Return all messages in our ForwardMsgQueue."""
return self.forward_msg_queue._queue
def run(
self,
widget_state: WidgetStates | None = None,
timeout: float = 3,
) -> ElementTree:
"""Run the script, and parse the output messages for querying
and interaction."""
rerun_data = RerunData(widget_states=widget_state)
self.request_rerun(rerun_data)
if not self._script_thread:
self.start()
require_widgets_deltas(self, timeout)
tree = parse_tree_from_messages(self.forward_msgs())
tree.script_path = self.script_path
tree._session_state = self.session_state
return tree
def script_stopped(self) -> bool:
for e in self.events:
if e in (
ScriptRunnerEvent.SCRIPT_STOPPED_FOR_RERUN,
ScriptRunnerEvent.SCRIPT_STOPPED_WITH_COMPILE_ERROR,
ScriptRunnerEvent.SCRIPT_STOPPED_WITH_SUCCESS,
):
return True
return False
def require_widgets_deltas(runner: LocalScriptRunner, timeout: float = 3) -> None:
"""Wait for the given ScriptRunner to emit a completion event. If the timeout
is reached, the runner will be shutdown and an error will be thrown.
"""
t0 = time.time()
while time.time() - t0 < timeout:
time.sleep(0.1)
if runner.script_stopped():
return
# If we get here, the runner hasn't yet completed before our
# timeout. Create an error string for debugging.
err_string = f"require_widgets_deltas() timed out after {timeout}s)"
# Shutdown the runner before throwing an error, so that the script
# doesn't hang forever.
runner.request_stop()
runner.join()
raise RuntimeError(err_string)