TravisCI integration and updated test suite (#296)

* Make TravisCI setup

* Use pytest, move tests to seperate files

* Added system to check if `onX` events were successfully executed

tests/utils.py

@@ -0,0 +1,83 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import unicode_literals
+
+import threading
+import logging
+import six
+
+from os import environ
+from random import randrange
+from contextlib import contextmanager
+from six import viewitems
+from fbchat import Client
+from fbchat.models import ThreadType
+
+log = logging.getLogger("fbchat.tests").addHandler(logging.NullHandler())
+
+
+class ClientThread(threading.Thread):
+    def __init__(self, client, *args, **kwargs):
+        self.client = client
+        self.should_stop = threading.Event()
+        super(ClientThread, self).__init__(*args, **kwargs)
+
+    def start(self):
+        self.client.startListening()
+        self.client.doOneListen()  # QPrimer, Facebook now knows we're about to start pulling
+        super(ClientThread, self).start()
+
+    def run(self):
+        while not self.should_stop.is_set() and self.client.doOneListen():
+            pass
+
+        self.client.stopListening()
+
+
+if six.PY2:
+    event_class = threading._Event
+else:
+    event_class = threading.Event
+
+
+class CaughtValue(event_class):
+    def set(self, res):
+        self.res = res
+        super(CaughtValue, self).set()
+
+    def wait(self, timeout=3):
+        super(CaughtValue, self).wait(timeout=timeout)
+
+
+def random_hex(length=20):
+    return "{:X}".format(randrange(16 ** length))
+
+
+def subset(a, **b):
+    print(a)
+    print(b)
+    return viewitems(b) <= viewitems(a)
+
+
+def load_variable(name, cache):
+    var = environ.get(name, None)
+    if var is not None:
+        if cache.get(name, None) != var:
+            cache.set(name, var)
+        return var
+
+    var = cache.get(name, None)
+    if var is None:
+        raise ValueError("Variable {!r} neither in environment nor cache".format(name))
+    return var
+
+
+@contextmanager
+def load_client(n, cache):
+    client = Client(
+        load_variable("client{}_email".format(n), cache),
+        load_variable("client{}_password".format(n), cache),
+        session_cookies=cache.get("client{}_session".format(n), None),
+    )
+    yield client
+    cache.set("client{}_session".format(n), client.getSession())