test: fix lint reworks

Follows #270

Author: DifferentialOrange

test/suites/lib/skip.py

@@ -96,10 +96,10 @@ def wrapper(self, *args, **kwargs):
 
         srv = None
 
-        if hasattr(self, 'servers'):
+        if hasattr(self, 'servers') and self.servers:
             srv = self.servers[0]
 
-        if hasattr(self, 'srv'):
+        if hasattr(self, 'srv') and self.srv:
             srv = self.srv
 
         assert srv is not None

test/suites/test_connection.py

@@ -157,7 +157,7 @@ def my_unpacker_factory(_):
         self.assertIsInstance(resp[0], tuple)
 
     def tearDown(self):
-        if hasattr(self, 'con'):
+        if self.con:
             self.con.close()
 
     @classmethod

test/suites/test_pool.py

@@ -566,7 +566,7 @@ def test_16_is_closed(self):
         self.assertEqual(self.pool.is_closed(), True)
 
     def tearDown(self):
-        if hasattr(self, 'pool'):
+        if self.pool:
             self.pool.close()
 
         for srv in self.servers:

test/suites/test_schema.py

@@ -44,6 +44,7 @@ def call_count(self):
 
 class TestSuiteSchemaAbstract(unittest.TestCase):
     # Define 'encoding' field in a concrete class.
+    encoding = None
 
     @classmethod
     def setUpClass(cls):
@@ -136,7 +137,6 @@ def setUpClass(cls):
             box.space.constr_tester_2:create_index('I1', { parts = {'id'} })
             box.space.constr_tester_2:create_index('I2', { parts = {'table1_id'} })
             """)
-        cls.encoding = None
 
     def setUp(self):
         # prevent a remote tarantool from clean our session