Removed UTILITIES_UNIT_TESTING

Removed the use of the environment variable to test `config asymmetric
on`. Instead replaced the validation method with a direct check for the
expected CONFIG_DB entry. Also removed the unnecessary classmethods in
TestPfcBase.

pfc/main.py

@@ -1,24 +1,12 @@
 #!/usr/bin/env python3
 import click
-import os
-import sys
 from swsscommon.swsscommon import ConfigDBConnector
 from tabulate import tabulate
 from natsort import natsorted
 
 ALL_PRIORITIES = [str(x) for x in range(8)]
 PRIORITY_STATUS = ['on', 'off']
 
-# mock the redis for unit test purposes #
-try:
-    if os.environ["UTILITIES_UNIT_TESTING"] == "2":
-        modules_path = os.path.join(os.path.dirname(__file__), "..")
-        tests_path = os.path.join(modules_path, "tests")
-        sys.path.insert(0, modules_path)
-        sys.path.insert(0, tests_path)
-except KeyError:
-    pass
-
 
 class Pfc(object):
     def __init__(self, cfgdb=None):
@@ -33,9 +21,6 @@ def configPfcAsym(self, interface, pfc_asym):
 
         configdb.mod_entry("PORT", interface, {'pfc_asym': pfc_asym})
 
-        if "UTILITIES_UNIT_TESTING" in os.environ and os.environ["UTILITIES_UNIT_TESTING"] == "2":
-            self.showPfcAsym(interface)
-
     def showPfcAsym(self, interface):
         """
         PFC handler to display asymmetric PFC information.

tests/pfc_input/assert_show_output.py

@@ -73,14 +73,6 @@
 
 """
 
-pfc_config_asymmetric = """\
-
-Interface    Asymmetric
------------  ------------
-Ethernet0    on
-
-"""
-
 pfc_config_priority_on = """\
 
 Interface    Lossless priorities

tests/pfc_test.py

@@ -1,9 +1,9 @@
 import os
 import sys
 import pfc.main as pfc
-from pfc_input.assert_show_output import pfc_cannot_find_intf, pfc_show_asymmetric_all, \
+from .pfc_input.assert_show_output import pfc_cannot_find_intf, pfc_show_asymmetric_all, \
    pfc_show_asymmetric_intf, pfc_show_priority_all, pfc_show_priority_intf, \
-   pfc_config_asymmetric, pfc_config_priority_on, pfc_asym_cannot_find_intf
+   pfc_config_priority_on, pfc_asym_cannot_find_intf
 from utilities_common.db import Db
 
 from click.testing import CliRunner
@@ -18,37 +18,31 @@
 
 class TestPfcBase(object):
 
-    @classmethod
-    def setup_class(cls):
-        print("SETUP")
-        os.environ["PATH"] += os.pathsep + scripts_path
-        os.environ['UTILITIES_UNIT_TESTING'] = "2"
-
-    def executor(self, cliobj, command, expected_rc=0, expected_output=None, runner=CliRunner()):
+    def executor(self, cliobj, command, expected_rc=0, expected_output=None, expected_cfgdb_entry=None,
+                 runner=CliRunner()):
         db = Db()
         result = runner.invoke(cliobj, command, obj=db)
         print(result.exit_code)
         print(result.output)
 
         if result.exit_code != expected_rc:
             print(result.exception)
-
         assert result.exit_code == expected_rc
+
         if expected_output:
             assert result.output == expected_output
 
-    @classmethod
-    def teardown_class(cls):
-        os.environ["PATH"] = os.pathsep.join(os.environ["PATH"].split(os.pathsep)[:-1])
-        os.environ["UTILITIES_UNIT_TESTING"] = "0"
-        print("TEARDOWN")
+        if expected_cfgdb_entry:
+            (table, key, field, expected_val) = expected_cfgdb_entry
+            configdb = db.cfgdb
+            entry = configdb.get_entry(table, key)
+            assert entry.get(field) == expected_val
 
 
 class TestPfc(TestPfcBase):
 
     @classmethod
     def setup_class(cls):
-        super().setup_class()
         from mock_tables import dbconnector
         from mock_tables import mock_single_asic
         reload(mock_single_asic)
@@ -80,7 +74,7 @@ def test_pfc_show_priority_intf_fake(self):
 
     def test_pfc_config_asymmetric(self):
         self.executor(pfc.cli, ['config', 'asymmetric', 'on', 'Ethernet0'],
-                      expected_output=pfc_config_asymmetric)
+                      expected_cfgdb_entry=('PORT', 'Ethernet0', 'pfc_asym', 'on'))
 
     def test_pfc_config_priority(self):
         self.executor(pfc.cli, ['config', 'priority', 'on', 'Ethernet0', '5'],