Replace Flask-Sockets with aiohttp for testing (#1445)

Flask-Sockets is deprecated and it won't receive any fixes in the future,
so it seems reasonable to replace it with some up-to-date library.
aiohttp has been chosen since it was already presented as an optional requirement.

These changes also:
  * move format checking for tests from run_validation.sh to setup.py
  * remove duplicated dependency installations from setup.py
  * add a codegen step on CI
  * force colors on CI

.github/workflows/ci-build.yml

@@ -26,6 +26,7 @@ jobs:
     env:
       PYTHON_SLACK_SDK_MOCK_SERVER_MODE: 'threading'
       CI_LARGE_SOCKET_MODE_PAYLOAD_TESTING_DISABLED: '1'
+      FORCE_COLOR: '1'
     steps:
     - uses: actions/checkout@v3
     - name: Set up Python ${{ matrix.python-version }}
@@ -35,9 +36,12 @@ jobs:
         cache: pip
     - name: Install dependencies
       run: |
-        pip install -U pip wheel
+        pip install -U pip setuptools wheel
         pip install -r requirements/testing.txt
         pip install -r requirements/optional.txt
+    - name: Run codegen
+      run: |
+        python setup.py codegen
     - name: Run validation (black/flake8/pytest)
       run: |
         python setup.py validate

requirements/testing.txt

@@ -1,11 +1,7 @@
 # pip install -r requirements/testing.txt
+aiohttp<4  # used for a WebSocket server mock
 pytest>=7.0.1,<8
 pytest-asyncio<1  # for async
-Flask-Sockets>=0.2,<1
-Flask>=1,<2  # TODO: Flask-Sockets is not yet compatible with Flask 2.x
-Werkzeug<2  # TODO: Flask-Sockets is not yet compatible with Flask 2.x
-itsdangerous==1.1.0  # TODO: Flask-Sockets is not yet compatible with Flask 2.x
-Jinja2==3.0.3  # https://github.com/pallets/flask/issues/4494
 pytest-cov>=2,<3
 # while flake8 5.x have issues with Python 3.12, flake8 6.x requires Python >= 3.8.1,
 # so 5.x should be kept in order to stay compatible with Python 3.6/3.7

scripts/run_validation.sh

@@ -5,13 +5,10 @@ set -e
 
 script_dir=`dirname $0`
 cd ${script_dir}/..
-pip install -U pip
+
+pip install -U pip setuptools wheel
 pip install -r requirements/testing.txt \
   -r requirements/optional.txt
 
-black --check tests/ integration_tests/
-# TODO: resolve linting errors for tests
-# flake8 tests/ integration_tests/
-
 python setup.py codegen
 python setup.py validate

setup.py

@@ -11,11 +11,6 @@
 
 here = os.path.abspath(os.path.dirname(__file__))
 
-codegen_dependencies = [
-    # Don't change this version without running CI builds;
-    # The latest version may not be available for older Python runtime
-    "black==22.10.0",
-]
 
 class BaseCommand(Command):
     user_options = []
@@ -41,11 +36,6 @@ def _run(self, s, command):
 
 class CodegenCommand(BaseCommand):
     def run(self):
-        self._run(
-            "Installing required dependencies ...",
-            [sys.executable, "-m", "pip", "install"] + codegen_dependencies,
-        )
-
         header = (
             "# !!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!\n"
             "#\n"
@@ -149,16 +139,28 @@ def initialize_options(self):
         self.test_target = ""
 
     def run(self):
-        self._run(
-            "Installing test dependencies ...",
-            [sys.executable, "-m", "pip", "install", "-r", "requirements/testing.txt"],
-        )
+        def run_black(target, target_name=None):
+            self._run(
+                f"Running black for {target_name or target} ...",
+                [sys.executable, "-m", "black", "--check", f"{here}/{target}"],
+            )
 
-        self._run("Running black for legacy packages ...", [sys.executable, "-m", "black", f"{here}/slack"])
-        self._run("Running black for slack_sdk package ...", [sys.executable, "-m", "black", f"{here}/slack_sdk"])
+        run_black("slack", "legacy packages")
+        run_black("slack_sdk", "slack_sdk package")
+        run_black("tests")
+        run_black("integration_tests")
 
-        self._run("Running flake8 for legacy packages ...", [sys.executable, "-m", "flake8", f"{here}/slack"])
-        self._run("Running flake8 for slack_sdk package ...", [sys.executable, "-m", "flake8", f"{here}/slack_sdk"])
+        def run_flake8(target, target_name=None):
+            self._run(
+                f"Running flake8 for {target_name or target} ...",
+                [sys.executable, "-m", "flake8", f"{here}/{target}"],
+            )
+
+        run_flake8("slack", "legacy packages")
+        run_flake8("slack_sdk", "slack_sdk package")
+        # TODO: resolve linting errors for tests
+        # run_flake8("tests")
+        # run_flake8("integration_tests")
 
         target = self.test_target.replace("tests/", "", 1)
         self._run(
@@ -175,7 +177,7 @@ def run(self):
 
 
 class UnitTestsCommand(BaseCommand):
-    """Support setup.py validate."""
+    """Support setup.py unit_tests."""
 
     description = "Run unit tests (pytest)."
     user_options = [("test-target=", "i", "tests/{test-target}")]

tests/slack_sdk/socket_mode/mock_socket_mode_server.py

@@ -1,6 +1,10 @@
+import asyncio
 import logging
 import os
 
+from aiohttp import WSMsgType, web
+
+
 socket_mode_envelopes = [
     """{"envelope_id":"1d3c79ab-0ffb-41f3-a080-d19e85f53649","payload":{"token":"verification-token","team_id":"T111","team_domain":"xxx","channel_id":"C111","channel_name":"random","user_id":"U111","user_name":"testxyz","command":"/hello-socket-mode","text":"","api_app_id":"A111","response_url":"https://hooks.slack.com/commands/T111/111/xxx","trigger_id":"111.222.xxx"},"type":"slash_commands","accepts_response_payload":true}""",
     """{"envelope_id":"cda4159a-72a5-4744-aba3-4d66eb52682b","payload":{"token":"verification-token","team_id":"T111","api_app_id":"A111","event":{"client_msg_id":"f0582a78-72db-4feb-b2f3-1e47d66365c8","type":"app_mention","text":"<@U111>","user":"U222","ts":"1610241741.000200","team":"T111","blocks":[{"type":"rich_text","block_id":"Sesm","elements":[{"type":"rich_text_section","elements":[{"type":"user","user_id":"U111"}]}]}],"channel":"C111","event_ts":"1610241741.000200"},"type":"event_callback","event_id":"Ev111","event_time":1610241741,"authorizations":[{"enterprise_id":null,"team_id":"T111","user_id":"U222","is_bot":true,"is_enterprise_install":false}],"is_ext_shared_channel":false,"event_context":"1-app_mention-T111-C111"},"type":"events_api","accepts_response_payload":false,"retry_attempt":0,"retry_reason":""}""",
@@ -20,50 +24,61 @@
 
 socket_mode_hello_message = """{"type":"hello","num_connections":2,"debug_info":{"host":"applink-111-xxx","build_number":10,"approximate_connection_time":18060},"connection_info":{"app_id":"A111"}}"""
 
-from flask import Flask
-from flask_sockets import Sockets
-
 
 def start_socket_mode_server(self, port: int):
-    def _start_socket_mode_server():
-        logger = logging.getLogger(__name__)
-        app: Flask = Flask(__name__)
-        sockets: Sockets = Sockets(app)
+    logger = logging.getLogger(__name__)
+    state = {}
+
+    def reset_server_state():
+        state.update(
+            hello_sent=False,
+            envelopes_to_consume=list(socket_mode_envelopes),
+        )
+
+    self.reset_server_state = reset_server_state
+
+    async def link(request):
+        ws = web.WebSocketResponse()
+        await ws.prepare(request)
+
+        async for msg in ws:
+            if msg.type != WSMsgType.TEXT:
+                continue
+
+            message = msg.data
+            logger.debug(f"Server received a message: {message}")
 
-        state = {
-            "hello_sent": False,
-            "envelopes_to_consume": list(socket_mode_envelopes),
-        }
+            if not state["hello_sent"]:
+                state["hello_sent"] = True
+                await ws.send_str(socket_mode_hello_message)
 
-        @sockets.route("/link")
-        def link(ws):
-            while not ws.closed:
-                message = ws.read_message()
-                if message is not None:
-                    if not state["hello_sent"]:
-                        ws.send(socket_mode_hello_message)
-                        state["hello_sent"] = True
+            if state["envelopes_to_consume"]:
+                e = state["envelopes_to_consume"].pop(0)
+                logger.debug(f"Send an envelope: {e}")
+                await ws.send_str(e)
 
-                    if len(state.get("envelopes_to_consume")) > 0:
-                        e = state.get("envelopes_to_consume").pop(0)
-                        logger.debug(f"Send an envelope: {e}")
-                        ws.send(e)
+            await ws.send_str(message)
 
-                    logger.debug(f"Server received a message: {message}")
-                    ws.send(message)
+        return ws
 
-        from gevent import pywsgi
-        from geventwebsocket.handler import WebSocketHandler
+    app = web.Application()
+    app.add_routes([web.get("/link", link)])
+    runner = web.AppRunner(app)
 
-        server = pywsgi.WSGIServer(("", port), app, handler_class=WebSocketHandler)
-        self.server = server
+    def run_server():
+        reset_server_state()
 
-        def reset_sever_state():
-            state["hello_sent"] = False
-            state["envelopes_to_consume"] = list(socket_mode_envelopes)
+        self.loop = loop = asyncio.new_event_loop()
+        asyncio.set_event_loop(loop)
+        loop.run_until_complete(runner.setup())
+        site = web.TCPSite(runner, "127.0.0.1", port, reuse_port=True)
+        loop.run_until_complete(site.start())
 
-        self.reset_sever_state = reset_sever_state
+        # run until it's stopped from the main thread
+        loop.run_forever()
 
-        server.serve_forever(stop_timeout=1)
+        loop.run_until_complete(runner.cleanup())
+        loop.run_until_complete(asyncio.sleep(1))
+        loop.close()
 
-    return _start_socket_mode_server
+    return run_server

tests/slack_sdk/socket_mode/test_interactions_builtin.py

@@ -4,6 +4,8 @@
 from random import randint
 from threading import Thread
 
+import pytest
+
 from slack_sdk.errors import SlackClientConfigurationError, SlackClientNotConnectedError
 from slack_sdk.socket_mode.request import SocketModeRequest
 
@@ -66,7 +68,7 @@ def test_interactions(self):
         try:
             buffer_size_list = [1024, 9000, 35, 49] + list([randint(16, 128) for _ in range(10)])
             for buffer_size in buffer_size_list:
-                self.reset_sever_state()
+                self.reset_server_state()
 
                 received_messages = []
                 received_socket_mode_requests = []
@@ -127,8 +129,8 @@ def socket_mode_request_handler(client: BaseSocketModeClient, request: SocketMod
             # Restore the default value
             sys.setrecursionlimit(default_recursion_limit)
             client.close()
-            self.server.stop()
-            self.server.close()
+            self.loop.stop()
+            t.join(timeout=5)
 
         self.logger.info(f"Passed with buffer size: {buffer_size_list}")
 
@@ -141,7 +143,7 @@ def test_send_message_while_disconnection(self):
         time.sleep(2)  # wait for the server
 
         try:
-            self.reset_sever_state()
+            self.reset_server_state()
             client = SocketModeClient(
                 app_token="xapp-A111-222-xyz",
                 web_client=self.web_client,
@@ -155,16 +157,13 @@ def test_send_message_while_disconnection(self):
 
             client.disconnect()
             time.sleep(1)  # wait for the connection
-            try:
+            with pytest.raises(SlackClientNotConnectedError):
                 client.send_message("foo")
-                self.fail("SlackClientNotConnectedError is expected here")
-            except SlackClientNotConnectedError as _:
-                pass
 
             client.connect()
             time.sleep(1)  # wait for the connection
             client.send_message("foo")
         finally:
             client.close()
-            self.server.stop()
-            self.server.close()
+            self.loop.stop()
+            t.join(timeout=5)

tests/slack_sdk/socket_mode/test_interactions_websocket_client.py

@@ -83,7 +83,9 @@ def socket_mode_request_handler(client: BaseSocketModeClient, request: SocketMod
             expected.sort()
 
             count = 0
-            while count < 10 and len(received_messages) < len(expected):
+            while count < 10 and (
+                len(received_messages) < len(expected) or len(received_socket_mode_requests) < len(socket_mode_envelopes)
+            ):
                 time.sleep(0.2)
                 count += 0.2
 
@@ -93,8 +95,8 @@ def socket_mode_request_handler(client: BaseSocketModeClient, request: SocketMod
             self.assertEqual(len(socket_mode_envelopes), len(received_socket_mode_requests))
         finally:
             client.close()
-            self.server.stop()
-            self.server.close()
+            self.loop.stop()
+            t.join(timeout=5)
 
     def test_send_message_while_disconnection(self):
         if is_ci_unstable_test_skip_enabled():
@@ -105,7 +107,6 @@ def test_send_message_while_disconnection(self):
         time.sleep(2)  # wait for the server
 
         try:
-            self.reset_sever_state()
             client = SocketModeClient(
                 app_token="xapp-A111-222-xyz",
                 web_client=self.web_client,
@@ -131,5 +132,5 @@ def test_send_message_while_disconnection(self):
             client.send_message("foo")
         finally:
             client.close()
-            self.server.stop()
-            self.server.close()
+            self.loop.stop()
+            t.join(timeout=5)

tests/slack_sdk_async/socket_mode/test_interactions_aiohttp.py

@@ -5,7 +5,9 @@
 from random import randint
 from threading import Thread
 
+import pytest
 from aiohttp import WSMessage
+
 from slack_sdk.socket_mode.request import SocketModeRequest
 
 from slack_sdk.socket_mode.async_client import AsyncBaseSocketModeClient
@@ -87,7 +89,9 @@ async def socket_mode_listener(
             expected.sort()
 
             count = 0
-            while count < 10 and len(received_messages) < len(expected):
+            while count < 10 and (
+                len(received_messages) < len(expected) or len(received_socket_mode_requests) < len(socket_mode_envelopes)
+            ):
                 await asyncio.sleep(0.2)
                 count += 0.2
 
@@ -97,8 +101,8 @@ async def socket_mode_listener(
             self.assertEqual(len(socket_mode_envelopes), len(received_socket_mode_requests))
         finally:
             await client.close()
-            self.server.stop()
-            self.server.close()
+            self.loop.stop()
+            t.join(timeout=5)
 
     @async_test
     async def test_send_message_while_disconnection(self):
@@ -124,16 +128,13 @@ async def test_send_message_while_disconnection(self):
 
             await client.disconnect()
             await asyncio.sleep(1)  # wait for the message receiver
-            try:
+            with pytest.raises(ConnectionError):
                 await client.send_message("foo")
-                self.fail("ConnectionError is expected here")
-            except ConnectionError as _:
-                pass
 
             await client.connect()
             await asyncio.sleep(1)  # wait for the message receiver
             await client.send_message("foo")
         finally:
             await client.close()
-            self.server.stop()
-            self.server.close()
+            self.loop.stop()
+            t.join(timeout=5)