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/test_base.py

@@ -0,0 +1,55 @@
+# -*- coding: utf-8 -*-
+
+from __future__ import unicode_literals
+
+import pytest
+import py_compile
+
+from glob import glob
+from os import path, environ
+from fbchat import Client
+from fbchat.models import FBchatUserError, Message
+
+
+@pytest.mark.offline
+def test_examples():
+    # Compiles the examples, to check for syntax errors
+    for name in glob(path.join(path.dirname(__file__), "../examples", "*.py")):
+        py_compile.compile(name)
+
+
+@pytest.mark.trylast
+@pytest.mark.expensive
+def test_login(client1):
+    assert client1.isLoggedIn()
+    email = client1.email
+    password = client1.password
+
+    client1.logout()
+
+    assert not client1.isLoggedIn()
+
+    with pytest.raises(FBchatUserError):
+        client1.login("<invalid email>", "<invalid password>", max_tries=1)
+
+    client1.login(email, password)
+
+    assert client1.isLoggedIn()
+
+
+@pytest.mark.trylast
+def test_sessions(client1):
+    session = client1.getSession()
+    Client("no email needed", "no password needed", session_cookies=session)
+    client1.setSession(session)
+    assert client1.isLoggedIn()
+
+
+@pytest.mark.tryfirst
+def test_default_thread(client1, thread):
+    client1.setDefaultThread(thread["id"], thread["type"])
+    assert client1.send(Message(text="Sent to the specified thread"))
+
+    client1.resetDefaultThread()
+    with pytest.raises(ValueError):
+        client1.send(Message(text="Should not be sent"))