from unittest import TestCase from test import support, mock_socket import socket import io import smtpd import asyncore class DummyServer(smtpd.SMTPServer): def __init__(self, localaddr, remoteaddr): smtpd.SMTPServer.__init__(self, localaddr, remoteaddr) self.messages = [] def process_message(self, peer, mailfrom, rcpttos, data): self.messages.append((peer, mailfrom, rcpttos, data)) if data == 'return status': return '250 Okish' class DummyDispatcherBroken(Exception): pass class BrokenDummyServer(DummyServer): def listen(self, num): raise DummyDispatcherBroken() class SMTPDServerTest(TestCase): def setUp(self): smtpd.socket = asyncore.socket = mock_socket def test_process_message_unimplemented(self): server = smtpd.SMTPServer('a', 'b') conn, addr = server.accept() channel = smtpd.SMTPChannel(server, conn, addr) def write_line(line): channel.socket.queue_recv(line) channel.handle_read() write_line(b'MAIL From:eggs@example') write_line(b'RCPT To:spam@example') write_line(b'DATA') self.assertRaises(NotImplementedError, write_line, b'spam\r\n.\r\n') def tearDown(self): asyncore.close_all() asyncore.socket = smtpd.socket = socket class SMTPDChannelTest(TestCase): def setUp(self): smtpd.socket = asyncore.socket = mock_socket self.old_debugstream = smtpd.DEBUGSTREAM self.debug = smtpd.DEBUGSTREAM = io.StringIO() self.server = DummyServer('a', 'b') conn, addr = self.server.accept() self.channel = smtpd.SMTPChannel(self.server, conn, addr) def tearDown(self): asyncore.close_all() asyncore.socket = smtpd.socket = socket smtpd.DEBUGSTREAM = self.old_debugstream def write_line(self, line): self.channel.socket.queue_recv(line) self.channel.handle_read() def test_broken_connect(self): self.assertRaises(DummyDispatcherBroken, BrokenDummyServer, 'a', 'b') def test_server_accept(self): self.server.handle_accept() def test_missing_data(self): self.write_line(b'') self.assertEqual(self.channel.socket.last, b'500 Error: bad syntax\r\n') def test_EHLO_not_implemented(self): self.write_line(b'EHLO test.example') self.assertEqual(self.channel.socket.last, b'502 Error: command "EHLO" not implemented\r\n') def test_HELO(self): name = smtpd.socket.getfqdn() self.write_line(b'HELO test.example') self.assertEqual(self.channel.socket.last, '250 {}\r\n'.format(name).encode('ascii')) def test_HELO_bad_syntax(self): self.write_line(b'HELO') self.assertEqual(self.channel.socket.last, b'501 Syntax: HELO hostname\r\n') def test_HELO_duplicate(self): self.write_line(b'HELO test.example') self.write_line(b'HELO test.example') self.assertEqual(self.channel.socket.last, b'503 Duplicate HELO/EHLO\r\n') def test_NOOP(self): self.write_line(b'NOOP') self.assertEqual(self.channel.socket.last, b'250 Ok\r\n') def test_NOOP_bad_syntax(self): self.write_line(b'NOOP hi') self.assertEqual(self.channel.socket.last, b'501 Syntax: NOOP\r\n') def test_QUIT(self): self.write_line(b'QUIT') self.assertEqual(self.channel.socket.last, b'221 Bye\r\n') def test_QUIT_arg_ignored(self): self.write_line(b'QUIT bye bye') self.assertEqual(self.channel.socket.last, b'221 Bye\r\n') def test_bad_state(self): self.channel.smtp_state = 'BAD STATE' self.write_line(b'HELO') self.assertEqual(self.channel.socket.last, b'451 Internal confusion\r\n') def test_command_too_long(self): self.write_line(b'MAIL from ' + b'a' * self.channel.command_size_limit + b'@example') self.assertEqual(self.channel.socket.last, b'500 Error: line too long\r\n') def test_data_too_long(self): # Small hack. Setting limit to 2K octets here will save us some time. self.channel.data_size_limit = 2048 self.write_line(b'MAIL From:eggs@example') self.write_line(b'RCPT To:spam@example') self.write_line(b'DATA') self.write_line(b'A' * self.channel.data_size_limit + b'A\r\n.') self.assertEqual(self.channel.socket.last, b'552 Error: Too much mail data\r\n') def test_need_MAIL(self): self.write_line(b'RCPT to:spam@example') self.assertEqual(self.channel.socket.last, b'503 Error: need MAIL command\r\n') def test_MAIL_syntax(self): self.write_line(b'MAIL from eggs@example') self.assertEqual(self.channel.socket.last, b'501 Syntax: MAIL FROM:
\r\n') def test_MAIL_missing_from(self): self.write_line(b'MAIL from:') self.assertEqual(self.channel.socket.last, b'501 Syntax: MAIL FROM:
\r\n') def test_MAIL_chevrons(self): self.write_line(b'MAIL from:') self.assertEqual(self.channel.socket.last, b'250 Ok\r\n') def test_nested_MAIL(self): self.write_line(b'MAIL from:eggs@example') self.write_line(b'MAIL from:spam@example') self.assertEqual(self.channel.socket.last, b'503 Error: nested MAIL command\r\n') def test_need_RCPT(self): self.write_line(b'MAIL From:eggs@example') self.write_line(b'DATA') self.assertEqual(self.channel.socket.last, b'503 Error: need RCPT command\r\n') def test_RCPT_syntax(self): self.write_line(b'MAIL From:eggs@example') self.write_line(b'RCPT to eggs@example') self.assertEqual(self.channel.socket.last, b'501 Syntax: RCPT TO:
\r\n') def test_data_dialog(self): self.write_line(b'MAIL From:eggs@example') self.assertEqual(self.channel.socket.last, b'250 Ok\r\n') self.write_line(b'RCPT To:spam@example') self.assertEqual(self.channel.socket.last, b'250 Ok\r\n') self.write_line(b'DATA') self.assertEqual(self.channel.socket.last, b'354 End data with .\r\n') self.write_line(b'data\r\nmore\r\n.') self.assertEqual(self.channel.socket.last, b'250 Ok\r\n') self.assertEqual(self.server.messages, [('peer', 'eggs@example', ['spam@example'], 'data\nmore')]) def test_DATA_syntax(self): self.write_line(b'MAIL From:eggs@example') self.write_line(b'RCPT To:spam@example') self.write_line(b'DATA spam') self.assertEqual(self.channel.socket.last, b'501 Syntax: DATA\r\n') def test_data_transparency_section_4_5_2(self): self.write_line(b'MAIL From:eggs@example') self.write_line(b'RCPT To:spam@example') self.write_line(b'DATA') self.write_line(b'..\r\n.\r\n') self.assertEqual(self.channel.received_data, '.') def test_multiple_RCPT(self): self.write_line(b'MAIL From:eggs@example') self.write_line(b'RCPT To:spam@example') self.write_line(b'RCPT To:ham@example') self.write_line(b'DATA') self.write_line(b'data\r\n.') self.assertEqual(self.server.messages, [('peer', 'eggs@example', ['spam@example','ham@example'], 'data')]) def test_manual_status(self): # checks that the Channel is able to return a custom status message self.write_line(b'MAIL From:eggs@example') self.write_line(b'RCPT To:spam@example') self.write_line(b'DATA') self.write_line(b'return status\r\n.') self.assertEqual(self.channel.socket.last, b'250 Okish\r\n') def test_RSET(self): self.write_line(b'MAIL From:eggs@example') self.write_line(b'RCPT To:spam@example') self.write_line(b'RSET') self.assertEqual(self.channel.socket.last, b'250 Ok\r\n') self.write_line(b'MAIL From:foo@example') self.write_line(b'RCPT To:eggs@example') self.write_line(b'DATA') self.write_line(b'data\r\n.') self.assertEqual(self.server.messages, [('peer', 'foo@example', ['eggs@example'], 'data')]) def test_RSET_syntax(self): self.write_line(b'RSET hi') self.assertEqual(self.channel.socket.last, b'501 Syntax: RSET\r\n') def test_attribute_deprecations(self): with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__server with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__server = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__line with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__line = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__state with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__state = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__greeting with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__greeting = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__mailfrom with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__mailfrom = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__rcpttos with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__rcpttos = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__data with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__data = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__fqdn with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__fqdn = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__peer with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__peer = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__conn with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__conn = 'spam' with support.check_warnings(('', DeprecationWarning)): spam = self.channel._SMTPChannel__addr with support.check_warnings(('', DeprecationWarning)): self.channel._SMTPChannel__addr = 'spam' def test_main(): support.run_unittest(SMTPDServerTest, SMTPDChannelTest) if __name__ == "__main__": test_main()