tests/transport_tcp_server_test.py

# Copyright 2024 Google LLC
#
# 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
#
#      https://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 os
import pytest
import socket
import unittest
from unittest.mock import ANY, patch

from bumble.transport.tcp_server import (
    open_tcp_server_transport,
    open_tcp_server_transport_with_socket,
)


class OpenTcpServerTransportTests(unittest.TestCase):
    def setUp(self):
        self.patcher = patch('bumble.transport.tcp_server._create_server')
        self.mock_create_server = self.patcher.start()

    def tearDown(self):
        self.patcher.stop()

    def test_open_with_spec(self):
        asyncio.run(open_tcp_server_transport('localhost:32100'))
        self.mock_create_server.assert_awaited_once_with(
            ANY, host='localhost', port=32100
        )

    def test_open_with_port_only_spec(self):
        asyncio.run(open_tcp_server_transport('_:32100'))
        self.mock_create_server.assert_awaited_once_with(ANY, host=None, port=32100)

    def test_open_with_socket(self):
        with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
            asyncio.run(open_tcp_server_transport_with_socket(sock=sock))
        self.mock_create_server.assert_awaited_once_with(ANY, sock=sock)


@pytest.mark.skipif(
    not os.environ.get('PYTEST_NOSKIP', 0),
    reason='''\
Not hermetic. Should only run manually with
  $ PYTEST_NOSKIP=1 pytest tests
''',
)
def test_open_with_real_socket():
    with socket.socket(socket.AF_INET, socket.SOCK_STREAM) as sock:
        sock.bind(('localhost', 0))
        port = sock.getsockname()[1]
        assert port != 0
        asyncio.run(open_tcp_server_transport_with_socket(sock=sock))