Refactor names tests

conftest.py

@@ -105,6 +105,11 @@ def Script(environment):
     return partial(jedi.Script, environment=environment)
 
 
+@pytest.fixture(scope='session')
+def names(environment):
+    return partial(jedi.names, environment=environment)
+
+
 @pytest.fixture(scope='session')
 def has_typing(environment):
     if environment.version_info >= (3, 5, 0):