def test_close():
"""WHEN the function 'close' is called, the connection to the server
shall be closed in a timely fashion.
"""
client = SocketClient("test_close")
mock_socket = mock.Mock()
client.sock = mock_socket
client.close()
mock_socket.close.assert_called()
def test_connect():
"""WHEN the function function 'connect' is called, and the host name
(string) and port number (integer) are given, an attempt to connect with
the respective server (socket) shall be made.
"""
client = SocketClient("test_connect")
with mock.patch('socket.socket'):
client.connect(host, port)
client.sock.connect.assert_called_with((host, port))
def test_get_config_and_connect():
"""WHEN the function 'get_config_and_connect' is called, and a config entry
containing the host name (string) and port number (integer) to the
specified client (client_name) is available and is of the correct format,
an attempt to connect with the respective server shall be made.
"""
client = SocketClient("test_socket")
data = {"socket": {"test_socket": {"host": host, "port": port}}}
mock_connect = mock.MagicMock()
client.connect = mock_connect
with mock.patch.object(config.var, 'data', data):
client.get_config_and_connect()
mock_connect.assert_called_with(host, port)
def test_get_config_and_connect_fail(config_data):
"""WHEN the function 'get_config_and_connect' is called, IF the config
entry containing the host name and port number to the specified client
(client_name) is of the wrong format or does not exist, THEN no attempt
to connect with the respective server shall be made and the boolean values
[False, False] shall be returned.
"""
client = SocketClient("test_socket")
mock_connect = mock.MagicMock()
client.connect = mock_connect
with mock.patch.object(config.var, 'data', config_data):
ok = client.get_config_and_connect()
mock_connect.assert_not_called()
assert ok == [False, False]
def server_client():
# Setup: create socket.
server = SocketServer()
thread = threading.Thread(target=server.create)
thread.start()
client = SocketClient("test_recv")
client.connect(host, port)
yield server, client
# Teardown: close socket and thread.
server.close()
thread.join()
def test_connect_fail():
"""WHEN the function function 'connect' is called, IF the server
belonging to the given host name (string) and port number (integer) is
not available, THEN the boolean value False shall be returned and the
instance attribute "sock" shall be set to None.
"""
client = SocketClient("test_connect_fail")
with mock.patch('socket.socket') as mock_socket:
mock_sock = mock.Mock()
mock_socket.return_value = mock_sock
mock_sock.connect.side_effect = socket.error
ok = client.connect(host, port)
assert client.sock is None
assert ok is False
def test_init():
"""The instance attributes 'client_name' and 'sock' shall be changeable."""
# Test changeability of 'client_name'.
client = SocketClient("test_init")
tmp = client.name
client.name = "test_init"
assert client.name == "test_init"
client.name = tmp
assert client.name == tmp
# Test changeability of 'sock'.
tmp = client.sock
client.sock = "test_init"
assert client.sock == "test_init"
client.sock = tmp
assert client.sock == tmp
def test_send():
"""The function 'send' shall transmit data to the socket in two steps:
1. Send the length of the data to transmit in bytes followed by
the delimiter '\n', 2. Send the data; and shall return the boolean
value True if no error occurred during this operation.
"""
client = SocketClient("test_send")
mock_socket = mock.Mock()
client.sock = mock_socket
data = 123
ok = client.send(data)
expected = [
call.sendall(b'a%d\n' % len(str(data))),
call.sendall(str(data).encode())
]
assert mock_socket.mock_calls == expected
assert ok is True
def test_send_fail():
"""WHEN the function 'send' is called, IF the server is not available,
THEN the boolean value False shall be returned and the instance variable
'sock' shall be set to None if its value differ from None.
"""
# Test 1: Socket error occurs; the variable 'sock' differs from None.
client = SocketClient("test_send_fail")
mock_socket = mock.Mock()
client.sock = mock_socket
mock_socket.sendall.side_effect = socket.error
ok = client.send(123)
assert client.sock is None
assert ok is False
# Test 2: Variable 'sock' equals already None.
client.sock = None
ok = client.send(123)
assert ok is False
def __init__(self):
self.client = SocketClient("abb")