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New tests for smtpd module. Has full coverage for SMTPChannel and SMTPServer.
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Richard Jones
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1 changed files with 221 additions and 0 deletions
221
Lib/test/test_smtpd.py
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221
Lib/test/test_smtpd.py
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import asynchat
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from unittest import TestCase
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import socket
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from test import support
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import asyncore
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import io
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import smtpd
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# mock-ish socket to sit underneath asyncore
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class DummySocket:
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def __init__(self):
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self.output = []
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self.queue = []
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self.conn = None
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def queue_recv(self, line):
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self.queue.append(line)
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def recv(self, *args):
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data = self.queue.pop(0) + b'\r\n'
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return data
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def fileno(self):
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return 0
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def setsockopt(self, *args):
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pass
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def getsockopt(self, *args):
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return 0
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def bind(self, *args):
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pass
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def accept(self):
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self.conn = DummySocket()
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return self.conn, 'c'
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def listen(self, *args):
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pass
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def setblocking(self, *args):
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pass
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def send(self, data):
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self.last = data
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self.output.append(data)
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return len(data)
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def getpeername(self):
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return 'peer'
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def close(self):
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pass
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class DummyServer(smtpd.SMTPServer):
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messages = []
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def create_socket(self, family, type):
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self.family_and_type = (socket.AF_INET, socket.SOCK_STREAM)
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self.set_socket(DummySocket())
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def process_message(self, peer, mailfrom, rcpttos, data):
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self.messages.append((peer, mailfrom, rcpttos, data))
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if data == 'return status':
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return '250 Okish'
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class DummyDispatcherBroken(Exception):
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pass
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class BrokenDummyServer(DummyServer):
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def listen(self, num):
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raise DummyDispatcherBroken()
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class SMTPDChannelTest(TestCase):
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def setUp(self):
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self.debug = smtpd.DEBUGSTREAM = io.StringIO()
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self.server = DummyServer('a', 'b')
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conn, addr = self.server.accept()
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self.channel = smtpd.SMTPChannel(self.server, conn, addr)
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def write_line(self, line):
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self.channel.socket.queue_recv(line)
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self.channel.handle_read()
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def test_broken_connect(self):
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self.assertRaises(DummyDispatcherBroken, BrokenDummyServer, 'a', 'b')
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def test_server_accept(self):
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self.server.handle_accept()
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def test_missing_data(self):
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self.write_line(b'')
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self.assertEqual(self.channel.last,
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b'500 Error: bad syntax\r\n')
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def test_EHLO_not_implemented(self):
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self.write_line(b'EHLO test.example')
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self.assertEqual(self.channel.last,
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b'502 Error: command "EHLO" not implemented\r\n')
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def test_HELO(self):
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name = socket.getfqdn()
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self.write_line(b'HELO test.example')
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self.assertEqual(self.channel.last,
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'250 {}\r\n'.format(name).encode('ascii'))
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def test_HELO_bad_syntax(self):
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self.write_line(b'HELO')
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self.assertEqual(self.channel.last,
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b'501 Syntax: HELO hostname\r\n')
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def test_HELO_duplicate(self):
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self.write_line(b'HELO test.example')
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self.write_line(b'HELO test.example')
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self.assertEqual(self.channel.last,
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b'503 Duplicate HELO/EHLO\r\n')
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def test_NOOP(self):
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self.write_line(b'NOOP')
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self.assertEqual(self.channel.last, b'250 Ok\r\n')
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def test_NOOP_bad_syntax(self):
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self.write_line(b'NOOP hi')
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self.assertEqual(self.channel.last,
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b'501 Syntax: NOOP\r\n')
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def test_QUIT(self):
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self.write_line(b'QUIT')
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self.assertEqual(self.channel.last, b'221 Bye\r\n')
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def test_QUIT_arg_ignored(self):
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self.write_line(b'QUIT bye bye')
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self.assertEqual(self.channel.last, b'221 Bye\r\n')
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def test_bad_state(self):
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self.channel._SMTPChannel__state = 'BAD STATE'
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self.write_line(b'HELO')
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self.assertEqual(self.channel.last, b'451 Internal confusion\r\n')
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def test_need_MAIL(self):
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self.write_line(b'RCPT to:spam@example')
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self.assertEqual(self.channel.last,
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b'503 Error: need MAIL command\r\n')
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def test_MAIL_syntax(self):
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self.write_line(b'MAIL from eggs@example')
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self.assertEqual(self.channel.last,
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b'501 Syntax: MAIL FROM:<address>\r\n')
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def test_MAIL_missing_from(self):
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self.write_line(b'MAIL from:')
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self.assertEqual(self.channel.last,
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b'501 Syntax: MAIL FROM:<address>\r\n')
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def test_MAIL_chevrons(self):
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self.write_line(b'MAIL from:<eggs@example>')
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self.assertEqual(self.channel.last, b'250 Ok\r\n')
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def test_nested_MAIL(self):
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self.write_line(b'MAIL from:eggs@example')
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self.write_line(b'MAIL from:spam@example')
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self.assertEqual(self.channel.last,
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b'503 Error: nested MAIL command\r\n')
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def test_need_RCPT(self):
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self.write_line(b'MAIL From:eggs@example')
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self.write_line(b'DATA')
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self.assertEqual(self.channel.last,
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b'503 Error: need RCPT command\r\n')
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def test_RCPT_syntax(self):
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self.write_line(b'MAIL From:eggs@example')
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self.write_line(b'RCPT to eggs@example')
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self.assertEqual(self.channel.last,
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b'501 Syntax: RCPT TO: <address>\r\n')
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def test_data_dialog(self):
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self.write_line(b'MAIL From:eggs@example')
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self.assertEqual(self.channel.last, b'250 Ok\r\n')
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self.write_line(b'RCPT To:spam@example')
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self.assertEqual(self.channel.last, b'250 Ok\r\n')
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self.write_line(b'DATA')
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self.assertEqual(self.channel.last,
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b'354 End data with <CR><LF>.<CR><LF>\r\n')
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self.write_line(b'data\r\nmore\r\n.')
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self.assertEqual(self.channel.last, b'250 Ok\r\n')
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self.assertEqual(self.server.messages[-1],
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('peer', 'eggs@example', ['spam@example'], 'data\nmore'))
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def test_DATA_syntax(self):
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self.write_line(b'MAIL From:eggs@example')
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self.write_line(b'RCPT To:spam@example')
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self.write_line(b'DATA spam')
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self.assertEqual(self.channel.last, b'501 Syntax: DATA\r\n')
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def test_multiple_RCPT(self):
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self.write_line(b'MAIL From:eggs@example')
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self.write_line(b'RCPT To:spam@example')
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self.write_line(b'RCPT To:ham@example')
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self.write_line(b'DATA')
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self.write_line(b'data\r\n.')
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self.assertEqual(self.server.messages[-1],
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('peer', 'eggs@example', ['spam@example','ham@example'], 'data'))
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def test_manual_status(self):
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self.write_line(b'MAIL From:eggs@example')
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self.write_line(b'RCPT To:spam@example')
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self.write_line(b'DATA')
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self.write_line(b'return status\r\n.')
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self.assertEqual(self.channel.last, b'250 Okish\r\n')
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def test_RSET(self):
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self.write_line(b'MAIL From:eggs@example')
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self.write_line(b'RCPT To:spam@example')
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self.write_line(b'RSET')
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self.assertEqual(self.channel.last, b'250 Ok\r\n')
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self.write_line(b'MAIL From:foo@example')
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self.write_line(b'RCPT To:eggs@example')
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self.write_line(b'DATA')
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self.write_line(b'data\r\n.')
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self.assertEqual(self.server.messages[0],
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('peer', 'foo@example', ['eggs@example'], 'data'))
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def test_RSET_syntax(self):
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self.write_line(b'RSET hi')
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self.assertEqual(self.channel.last, b'501 Syntax: RSET\r\n')
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def test_main():
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support.run_unittest(SMTPDChannelTest)
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if __name__ == "__main__":
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test_main()
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