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, 31 insertions, 21 deletions

diff --git a/test/test_tcp.py b/test/test_tcp.py
index f8e51057d38..de126362107 100644
--- a/test/test_tcp.py
+++ b/test/test_tcp.py
@@ -7,7 +7,7 @@ from vpp_ip_route import VppIpTable, VppIpRoute, VppRoutePath
 
 
 class TestTCP(VppTestCase):
-    """ TCP Test Case """
+    """TCP Test Case"""
 
     @classmethod
     def setUpClass(cls):
@@ -36,10 +36,12 @@ class TestTCP(VppTestCase):
             table_id += 1
 
         # Configure namespaces
-        self.vapi.app_namespace_add_del(namespace_id="0",
-                                        sw_if_index=self.loop0.sw_if_index)
-        self.vapi.app_namespace_add_del(namespace_id="1",
-                                        sw_if_index=self.loop1.sw_if_index)
+        self.vapi.app_namespace_add_del(
+            namespace_id="0", sw_if_index=self.loop0.sw_if_index
+        )
+        self.vapi.app_namespace_add_del(
+            namespace_id="1", sw_if_index=self.loop1.sw_if_index
+        )
 
     def tearDown(self):
         for i in self.lo_interfaces:
@@ -50,31 +52,38 @@ class TestTCP(VppTestCase):
         super(TestTCP, self).tearDown()
 
     def test_tcp_transfer(self):
-        """ TCP echo client/server transfer """
+        """TCP echo client/server transfer"""
 
         # Add inter-table routes
-        ip_t01 = VppIpRoute(self, self.loop1.local_ip4, 32,
-                            [VppRoutePath("0.0.0.0",
-                                          0xffffffff,
-                                          nh_table_id=1)])
-        ip_t10 = VppIpRoute(self, self.loop0.local_ip4, 32,
-                            [VppRoutePath("0.0.0.0",
-                                          0xffffffff,
-                                          nh_table_id=0)], table_id=1)
+        ip_t01 = VppIpRoute(
+            self,
+            self.loop1.local_ip4,
+            32,
+            [VppRoutePath("0.0.0.0", 0xFFFFFFFF, nh_table_id=1)],
+        )
+        ip_t10 = VppIpRoute(
+            self,
+            self.loop0.local_ip4,
+            32,
+            [VppRoutePath("0.0.0.0", 0xFFFFFFFF, nh_table_id=0)],
+            table_id=1,
+        )
         ip_t01.add_vpp_config()
         ip_t10.add_vpp_config()
 
         # Start builtin server and client
         uri = "tcp://" + self.loop0.local_ip4 + "/1234"
-        error = self.vapi.cli("test echo server appns 0 fifo-size 4 uri " +
-                              uri)
+        error = self.vapi.cli("test echo server appns 0 fifo-size 4 uri " + uri)
         if error:
             self.logger.critical(error)
             self.assertNotIn("failed", error)
 
-        error = self.vapi.cli("test echo client mbytes 10 appns 1 " +
-                              "fifo-size 4 no-output test-bytes " +
-                              "syn-timeout 2 uri " + uri)
+        error = self.vapi.cli(
+            "test echo client mbytes 10 appns 1 "
+            + "fifo-size 4 no-output test-bytes "
+            + "syn-timeout 2 uri "
+            + uri
+        )
         if error:
             self.logger.critical(error)
             self.assertNotIn("failed", error)
@@ -104,12 +113,13 @@ class TestTCPUnitTests(VppTestCase):
         self.vapi.session_enable_disable(is_enable=0)
 
     def test_tcp_unittest(self):
-        """ TCP Unit Tests """
+        """TCP Unit Tests"""
         error = self.vapi.cli("test tcp all")
 
         if error:
             self.logger.critical(error)
         self.assertNotIn("failed", error)
 
-if __name__ == '__main__':
+
+if __name__ == "__main__":
     unittest.main(testRunner=VppTestRunner)