





"""simple docstring"""




from __future__ import annotations


class        __UpperCamelCase				:






							def __init__(   self      ,					lowerCAmelCase__      )	-> None:
								a      :		str	=				order

								# a_{0} ... a_{k}
								a      :		int	=				[1.0] + [0.0] * order
								# b_{0} ... b_{k}
								a      :		Union[str, Any]	=				[1.0] + [0.0] * order

								# x[n-1] ... x[n-k]
								a      :		Any	=				[0.0] * self.order
								# y[n-1] ... y[n-k]
								a      :		Tuple	=				[0.0] * self.order






							def     __a   (   self      ,					lowerCAmelCase__      ,					lowerCAmelCase__      )	-> None:
								if len(lowerCAmelCase__      ) < self.order:
									a      :		Dict	=				[1.0, *a_coeffs]

								if len(lowerCAmelCase__      ) != self.order + 1:
									a      :		Optional[int]	=				(
									    f"""Expected a_coeffs to have {self.order + 1} elements """
									    f"""for {self.order}-order filter, got {len(lowerCAmelCase__      )}"""
									)
									raise ValueError(lowerCAmelCase__      )

								if len(lowerCAmelCase__      ) != self.order + 1:
									a      :		Optional[Any]	=				(
									    f"""Expected b_coeffs to have {self.order + 1} elements """
									    f"""for {self.order}-order filter, got {len(lowerCAmelCase__      )}"""
									)
									raise ValueError(lowerCAmelCase__      )

								a      :		Any	=				a_coeffs
								a      :		int	=				b_coeffs






							def     __a   (   self      ,					lowerCAmelCase__      )	-> float:
								a      :		List[str]	=				0.0

								# Start at index 1 and do index 0 at the end.
								for i in range(1      ,					self.order + 1      ):
									result += (
									    self.b_coeffs[i] * self.input_history[i - 1]
									    - self.a_coeffs[i] * self.output_history[i - 1]
									)

								a      :		Optional[int]	=				(result + self.b_coeffs[0] * sample) / self.a_coeffs[0]

								a      :		Optional[Any]	=				self.input_history[:-1]
								a      :		str	=				self.output_history[:-1]

								a      :		int	=				sample
								a      :		List[Any]	=				result

								return result









"""simple docstring"""




from unittest.mock import Mock, patch

from file_transfer.send_file import send_file






@patch("socket.socket"					)
@patch("builtins.open"					)
def       _SCREAMING_SNAKE_CASE		(	_lowercase						:    List[Any]    ,       _lowercase						:    int					) ->str:






	'''simple docstring'''






	a      :		Optional[Any]	=				Mock()
	a      :		Dict	=				conn, Mock()
	a      :		Union[str, Any]	=				iter([1, None]					)
	a      :		Optional[int]	=				lambda _lowercase					: next(_lowercase					)

	# ===== invoke =====
	send_file(filename="mytext.txt"    ,       testing=_lowercase					)

	# ===== ensurance =====
	sock.assert_called_once()
	sock.return_value.bind.assert_called_once()
	sock.return_value.listen.assert_called_once()
	sock.return_value.accept.assert_called_once()
	conn.recv.assert_called_once()

	file.return_value.__enter__.assert_called_once()
	file.return_value.__enter__.return_value.read.assert_called()

	conn.send.assert_called_once()
	conn.close.assert_called_once()
	sock.return_value.shutdown.assert_called_once()
	sock.return_value.close.assert_called_once()


