update: add None parameter to impression events in decision tests

Author: FarhanAnjum-opti

tests/test_user_context.py

@@ -401,7 +401,8 @@ def test_decide_feature_rollout(self):
             'rollout',
             expected.enabled,
             'test_user',
-            user_attributes
+            user_attributes,
+            None
         )
 
         # assert notification count
@@ -564,7 +565,8 @@ def test_decide_feature_null_variation(self):
             'rollout',
             expected.enabled,
             'test_user',
-            {'browser': 'chrome'}
+            {'browser': 'chrome'},
+            None
         )
 
     def test_decide_feature_null_variation__send_flag_decision_false(self):
@@ -841,7 +843,8 @@ def test_decide__option__exclude_variables(self):
             'feature-test',
             expected.enabled,
             'test_user',
-            {'browser': 'chrome'}
+            {'browser': 'chrome'},
+            None
         )
 
     def test_decide__option__include_reasons__feature_test(self):
@@ -953,7 +956,8 @@ def test_decide__option__enabled_flags_only(self):
             'rollout',
             expected.enabled,
             'test_user',
-            user_attributes
+            user_attributes,
+            None
         )
 
     def test_decide__default_options__with__options(self):
@@ -1512,7 +1516,8 @@ def test_should_return_valid_decision_after_setting_and_removing_forced_decision
             'feature-test',
             expected.enabled,
             'test_user',
-            {}
+            {},
+            None
         )
 
         self.assertTrue('User "test_user" is in variation "control" of experiment test_experiment.'