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from nose import with_setup
from nose.tools import assert_equal, raises
import chat
import socket
TIMEOUT = 0.1
NULLNETSTRING = "0:,"
SIMPLESTRING = "Hello world!"
SIMPLENETSTRING = "12:Hello world!,"
class TestCases(object):
def setup(self):
"""Creates a socket pair for testing"""
self.s1, self.s2 = socket.socketpair()
self.s1.settimeout(TIMEOUT)
self.s2.settimeout(TIMEOUT)
def teardown(self):
"""Closes the socket pair"""
self.s1.close()
self.s2.close()
@with_setup(setup, teardown)
def test_send_null_netstring(self):
"""Check that we construct a empty Netstring correctly"""
chat.send_netstring(self.s1, "")
assert_equal(self.s2.recv(1024), NULLNETSTRING)
@with_setup(setup, teardown)
def test_send_simple_netstring(self):
"""Check that we construct a simple Netstring correctly"""
chat.send_netstring(self.s1, SIMPLESTRING)
assert_equal(self.s2.recv(1024), SIMPLENETSTRING)
@with_setup(setup, teardown)
def test_recv_null_netstring(self):
"""Check that we can decode a null Netstring"""
self.s1.sendall(NULLNETSTRING)
assert_equal(chat.recv_netstring(self.s2), "")
@with_setup(setup, teardown)
def test_recv_null_netstring(self):
"""Check that we can decode a simple Netstring"""
self.s1.sendall(SIMPLENETSTRING)
assert_equal(chat.recv_netstring(self.s2), SIMPLESTRING)
@with_setup(setup, teardown)
@raises(socket.timeout)
def test_short_netstring(self):
self.s1.sendall("1234:not that long!,")
assert chat.recv_netstring(self.s2) is None
@with_setup(setup, teardown)
@raises(chat.ProtocolError)
def test_long_netstring(self):
self.s1.sendall("5:not that short!,")
assert chat.recv_netstring(self.s2) is None
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