Re-add a few online tests, to easily check when Facebook breaks stuff

tests/online/conftest.py

@@ -0,0 +1,28 @@
+import fbchat
+import pytest
+import logging
+import getpass
+
+
+@pytest.fixture(scope="session")
+def session(pytestconfig):
+    session_cookies = pytestconfig.cache.get("session_cookies", None)
+    try:
+        session = fbchat.Session.from_cookies(session_cookies)
+    except fbchat.FacebookError:
+        logging.exception("Error while logging in with cookies!")
+        session = fbchat.Session.login(input("Email: "), getpass.getpass("Password: "))
+
+    yield session
+
+    pytestconfig.cache.set("session_cookies", session.get_cookies())
+
+
+@pytest.fixture
+def client(session):
+    return fbchat.Client(session=session)
+
+
+@pytest.fixture
+def listener(session):
+    return fbchat.Listener(session=session, chat_on=False, foreground=False)