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# -*- coding: utf-8 -*-
from io import StringIO, BytesIO
try:
from unittest import mock
except ImportError:
import mock
class MockProjSocket(object):
"""A context manager that mocks socket creation inside projector module
Read from the mock returns response string passed in constructor.
Write into the mock appends data in .written string attribute, besides
calling .write mock method
"""
mock_target = 'pypjlink.projector.socket.socket'
def __init__(self, response):
self._response = response
self._mock_sock = None
def __enter__(self):
mock_socket_func = mock.patch(self.mock_target).__enter__()
self._mock_sock = mock_socket_func.return_value
stream = self._mock_sock.makefile.return_value
import sys
if sys.version_info.major == 2:
buf = BytesIO(self._response.encode('utf-8'))
else:
buf = StringIO(self._response)
stream.read = buf.read
stream.written = ''
def _write(data):
stream.written += data
stream.write.side_effect = _write
return stream
def __exit__ (self, exc_type, exc_value, traceback):
self._mock_sock.__exit__()
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