fix error in UT test_adapter.py

Author: AmosChenYQ

.travis.yml

@@ -4,6 +4,7 @@ python:
 - '3.5'
 - '3.6'
 - '3.7'
+- '3.8'
 install:
 - pip install -r requirements.txt
 - pip install coveralls

test_results

@@ -0,0 +1,36 @@
+E.E.E.
+======================================================================
+ERROR: test_add_policy (test_adapter.TestConfig)
+test add_policy
+----------------------------------------------------------------------
+Traceback (most recent call last):
+  File "/home/ubuntu/pymongo-adapter/tests/test_adapter.py", line 65, in test_add_policy
+    e = casbin.Enforcer(get_fixture('rbac_model.conf'), adapter, True)
+TypeError: __init__() takes from 1 to 3 positional arguments but 4 were given
+
+======================================================================
+ERROR: test_enforcer_basic (test_adapter.TestConfig)
+test policy
+----------------------------------------------------------------------
+Traceback (most recent call last):
+  File "/home/ubuntu/pymongo-adapter/tests/test_adapter.py", line 53, in test_enforcer_basic
+    e = get_enforcer()
+  File "/home/ubuntu/pymongo-adapter/tests/test_adapter.py", line 19, in get_enforcer
+    e = casbin.Enforcer(get_fixture('rbac_model.conf'), adapter, True)
+TypeError: __init__() takes from 1 to 3 positional arguments but 4 were given
+
+======================================================================
+ERROR: test_save_policy (test_adapter.TestConfig)
+test save_policy
+----------------------------------------------------------------------
+Traceback (most recent call last):
+  File "/home/ubuntu/pymongo-adapter/tests/test_adapter.py", line 87, in test_save_policy
+    e = get_enforcer()
+  File "/home/ubuntu/pymongo-adapter/tests/test_adapter.py", line 19, in get_enforcer
+    e = casbin.Enforcer(get_fixture('rbac_model.conf'), adapter, True)
+TypeError: __init__() takes from 1 to 3 positional arguments but 4 were given
+
+----------------------------------------------------------------------
+Ran 6 tests in 0.023s
+
+FAILED (errors=3)

tests/test_adapter.py

@@ -16,7 +16,7 @@ def get_fixture(path):
 def get_enforcer():
     adapter = Adapter('mongodb://localhost:27017', 'casbin_test')
 
-    e = casbin.Enforcer(get_fixture('rbac_model.conf'), adapter, True)
+    e = casbin.Enforcer(get_fixture('rbac_model.conf'), adapter)
     model = e.get_model()
     model.clear_policy()
     model.add_policy('p', 'p', ['alice', 'data1', 'read'])
@@ -38,7 +38,7 @@ def get_enforcer():
     model.add_policy('g', 'g', ['alice', 'data2_admin'])
     adapter.save_policy(model)
 
-    return casbin.Enforcer(get_fixture('rbac_model.conf'), adapter, True)
+    return casbin.Enforcer(get_fixture('rbac_model.conf'), adapter)
 
 
 class TestConfig(TestCase):
@@ -62,7 +62,7 @@ def test_add_policy(self):
         test add_policy
         '''
         adapter = Adapter('mongodb://localhost:27017', 'casbin_rule')
-        e = casbin.Enforcer(get_fixture('rbac_model.conf'), adapter, True)
+        e = casbin.Enforcer(get_fixture('rbac_model.conf'), adapter)
 
         adapter.add_policy(sec=None, ptype='p', rule=['alice', 'data1', 'read'])
         adapter.add_policy(sec=None, ptype='p', rule=['bob', 'data2', 'write'])