[testing] Add most testing via tox.ini

Consolidate testing, so that things can be run from CLI, CI and
various other means in a consistent way by using tox.

* Updated all the flake8 tests in the tests folder.
* Added pylint as a neutral test so that we can work on this in stages
  and have some collaboration on what we test and don't
* The tox tests for unit, stageone, stagetwo testing makes is easier
  for users to know how to run tests, and not have to do things
  manually
* Using tox for CI doesn't make sense, as that will create virtual
  envs and will disregard system/snap based python modules so may not
  work

Signed-off-by: Arif Ali <arif.ali@canonical.com>

1 files changed, 6 insertions, 2 deletions

diff --git a/tests/report_tests/plugin_tests/teamd.py b/tests/report_tests/plugin_tests/teamd.py
index 1c64e457..6b1b9337 100644
--- a/tests/report_tests/plugin_tests/teamd.py
+++ b/tests/report_tests/plugin_tests/teamd.py
@@ -32,11 +32,15 @@ class TeamdPluginTest(StageTwoReportTest):
         # create the team device
         res = process.run('nmcli con add type team ifname sostesting',
                           timeout=30)
-        assert res.exit_status == 0, "Failed creating team device: %s" % res.stdout_text
+        assert \
+            res.exit_status == 0, \
+            f"Failed creating team device: {res.stdout_text}"
 
     def post_test_tear_down(self):
         res = process.run('nmcli con delete team-sostesting', timeout=30)
-        assert res.exit_status == 0, "Failed to delete temp team device: %s" % res.stdout_text
+        assert \
+            res.exit_status == 0, \
+            f"Failed to delete temp team device: {res.stdout_text}"
 
     def test_teamd_plugin_executed(self):
         self.assertPluginIncluded('teamd')