Added timing test (simulate silly window syndrome)

Updated README

README.md

 # We want to break it!
 
 at least the smtp servers of the other groups..
+
+
+## Run Tests
+`python3 run.py testing.marschke.me 9001 smtp-server-group-a 6666
+python3 run.py testing.marschke.me 9001 smtp-server-group-b 8008
+python3 run.py testing.marschke.me 9001 smtp-server-group-c 5555
+python3 run.py testing.marschke.me 9001 smtp-server-group-d 25
+python3 run.py testing.marschke.me 9001 julianweise/simplesmtp 4431 --ssl --wait-up 2`

run.py

@@ -24,7 +24,7 @@ def main():
     test_server = None
     try:
         test_server = TestServer(args.domain, args.port, args.docker_template, args.docker_port, args.ssl, args.wait_up)
-        for clazz in [TestFuzzing, TestMail, TestSession]:
+        for clazz in [TestDrops, TestFuzzing, TestMail, TestSession]:
             for method in dir(clazz):
                 if method[:5] == 'test_':
                     suite.addTest(clazz(test_server, method))

tests/TestDrops.py

+import socket
+import random
+import time
+
+from util import BaseTest
+
+
+class TestDrops(BaseTest):
+    def assertResponse(self, expectedCode, message):  # pylint: disable=invalid-name
+        if isinstance(message, str):
+            message = message.encode('ASCII')
+        while len(message) > 0:
+            slice = random.randint(1, len(message))
+            self.client.send(message[0:slice])
+            message = message[slice:]
+            time.sleep(random.uniform(0.01, 0.1))
+        self.assertResponse(expectedCode)
+
+    def test_mail(self):
+        self.assertResponse(250, 'HELO marschke.me\r\n')
+        self.assertResponse(250, 'MAIL FROM:<leonard@marschke.me>\r\n')
+        self.assertResponse(250, 'RCPT TO:<firstAddress@{}>\r\n'.format(self.test_server.domain))
+        self.assertResponse(250, 'RCPT TO:<secondAddress@{}>\r\n'.format(self.test_server.domain))
+        self.assertResponse(354, 'DATA\r\n' + \
+                                 'Date: Thu, 10 May 2018 10:33:29 -0100\r\n' + \
+                                 'FROM: Leonard Marschke<leonard@marschke.me>\r\n' + \
+                                 'Subject: Testmail\r\n' + \
+                                 'To: firstaddress@{}\r\n'.format(self.test_server.domain) + \
+                                 '\r\n' + \
+                                 'Hi all, this is\r\n' + \
+                                 'a second line.\r\n' + \
+                                 'And a third.\r\n' + \
+                                 'Single point incoming.\r\n' + \
+                                 '..\r\n' + \
+                                 'BR\r\n')
+        self.assertResponse(250, '.\r\n')
+        self.assertResponse(221, 'QUIT\r\n')

tests/TestFuzzing.py

@@ -18,7 +18,6 @@ class TestFuzzing(BaseTest):
             'VRFY',
             ''
         ]
-        random.seed(42)
         for _ in range(0, 1337):
             command = random.choice(possible_commands)+' '
             command += ''.join(chr(random.randint(1, 127)) for x in range(random.randint(0, 127)))
@@ -33,8 +32,7 @@ class TestFuzzing(BaseTest):
 
         self.assertResponse(500, 'FAIL\r\n')
 
-    def test_fuzzing(self):
-        random.seed(42)
+    def test_unrecognized_command(self):
         self.assertResponse(500, 'FAIL\r\n')
 
     def test_sentry_issue_49(self):

util/BaseTest.py

 import socket
 import unittest
+import random
 
 
 class BaseTest(unittest.TestCase):
@@ -11,6 +12,7 @@ class BaseTest(unittest.TestCase):
     def setUp(self):
         self.client = self.test_server.create_client()
         self.assertResponse(220)
+        random.seed(42)
 
     def tearDown(self):
         self.client.close()
@@ -19,17 +21,14 @@ class BaseTest(unittest.TestCase):
         def format_message(message):
             if not message or isinstance(message, bytes):
                 return message
-
             if message[-2:] == '\r\n':
                 return message[:-2]
-
             return message
 
         if message:
             if isinstance(message, str):
-                self.client.send(message.encode('ASCII'))
-            else:
-                self.client.send(message)
+                message = message.encode('ASCII')
+            self.client.send(message)
         response = ''
         while not response.endswith('\r\n'):
             try: