tox: Update dependencies and fix new lints and warnings

Signed-off-by: Jonathas-Conceicao <[email protected]>

Author: Jonathas-Conceicao

pytest.ini

@@ -0,0 +1,3 @@
+[pytest]
+junit_family=xunit1
+filterwarnings = ignore:.*pep8.*

tox.ini

@@ -1,12 +1,12 @@
 [tox]
-envlist = py35, py36
+envlist = py35, py36, py37, py38
 
 [testenv]
 deps =
-    pylint==1.7.*
-    pytest==2.9.1
-    pytest-cov==2.2.1
-    pytest-pep8==1.0.6
+    pylint==2.*
+    pytest==5.*
+    pytest-cov==2.*
+    pytest-pep8==1.*
 commands =
     py.test \
         --cov={envsitepackagesdir}/updatehub \

updatehub/api.py

@@ -18,7 +18,7 @@
 import json
 
 
-class Api(object):
+class Api:
     """
     Api class used to access the agent API. Must be executed on the host that
     is running the agent.

updatehub/listener.py

@@ -7,10 +7,10 @@
 
 import io
 import os
+import sys
 import socket
 import threading
 
-
 from enum import Enum
 from enum import unique
 
@@ -57,7 +57,7 @@ class State(Enum):
     ERROR = "error"
 
 
-class StateCommand(object):
+class StateCommand:
     """
     A command class whose objects can be used to send commands back to the
     agent.
@@ -107,17 +107,15 @@ class MalformedState(Exception):
     Exception class raised on errors of the communication protocol on the
     socket.
     """
-    pass
 
 
 class StateError(Exception):
     """
     Exception class raised when receiving errors from the agent execution.
     """
-    pass
 
 
-class StateChangeListener(object):
+class StateChangeListener:
     """
     Listener class for the agent. Objects from this class monitor a Unix socket
     that will receive data from the agent, and triggers registered callbacks
@@ -210,7 +208,7 @@ def start(self):
         """
         if not os.path.isfile(StateChangeListener.SDK_TRIGGER_FILENAME):
             print("updatehub-sdk-statechange-trigger not found!")
-            exit(1)
+            sys.exit()
 
         self.running = True
         self.thread.start()