tests: replace pycodestyle with black

Drop pycodestyle for code style checking in favor of black. Black is
much faster, stable PEP8 compliant code style checker offering also
automatic formatting. It aims to be very stable and produce smallest
diffs. It's used by many small and big projects.

Running checkstyle with black takes a few seconds with a terse output.
Thus, test-checkstyle-diff is no longer necessary.

Expand scope of checkstyle to all python files in the repo, replacing
test-checkstyle with checkstyle-python.

Also, fixstyle-python is now available for automatic style formatting.

Note: python virtualenv has been consolidated in test/Makefile,
test/requirements*.txt which will eventually be moved to a central
location.  This is required to simply the automated generation of
docker executor images in the CI.

Type: improvement
Change-Id: I022a326603485f58585e879ac0f697fceefbc9c8
Signed-off-by: Klement Sekera <klement.sekera@gmail.com>
Signed-off-by: Dave Wallace <dwallacelf@gmail.com>

1 files changed, 6 insertions, 4 deletions

diff --git a/test/test_vppinfra.py b/test/test_vppinfra.py
index 36cd55b3550..3a8f8e96fee 100644
--- a/test/test_vppinfra.py
+++ b/test/test_vppinfra.py
@@ -6,7 +6,8 @@ from framework import VppTestCase, VppTestRunner
 
 
 class TestVppinfra(VppTestCase):
-    """ Vppinfra Unit Test Cases """
+    """Vppinfra Unit Test Cases"""
+
     vpp_worker_count = 1
 
     @classmethod
@@ -24,16 +25,17 @@ class TestVppinfra(VppTestCase):
         super(TestVppinfra, self).tearDown()
 
     def test_bitmap_unittest(self):
-        """ Bitmap Code Coverage Test """
+        """Bitmap Code Coverage Test"""
         cmds = ["test bitmap"]
 
         for cmd in cmds:
             r = self.vapi.cli_return_response(cmd)
             if r.retval != 0:
-                if hasattr(r, 'reply'):
+                if hasattr(r, "reply"):
                     self.logger.info(cmd + " FAIL reply " + r.reply)
                 else:
                     self.logger.info(cmd + " FAIL retval " + str(r.retval))
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     unittest.main(testRunner=VppTestRunner)