Merged with master

CHANGELOG.md

@@ -7,6 +7,8 @@
 * Fixed a problem where resource names were reported wrong in some failures. ([#171](https://github.com/eerkunt/terraform-compliance/issues/171))
 * Fixed a problem where in some cases `teraform-compliance` where giving `AttributeError: 'NoneType' object has no attribute 'get'` exception. ([#172](https://github.com/eerkunt/terraform-compliance/issues/172))
 * Supporting multiple provider or providers aliases. ([#173](https://github.com/eerkunt/terraform-compliance/issues/173))
+* Filtering steps are now performing case insensitive matching.
+* Improved error messaged on steps doing math operations.
 
 ## 1.0.52 (2019-10-29)
 * Fixed a problem where resource mounting were causing a issues on `resources that support tags`. ([#168](https://github.com/eerkunt/terraform-compliance/issues/168))

tests/mocks.py

@@ -305,7 +305,11 @@ def __init__(self):
         }
         self.configuration = {
             'providers' : {
-                'some_provider': 'some_provider_value'
+                'some_provider.some_provider_alias': {
+                    'name': 'some_provider',
+                    'alias': 'some_provider_alias',
+                    'some_provider': 'some_provider_value'
+                }
             }
         }
 
@@ -315,6 +319,9 @@ def find_resources_by_type(self, resource_type):
                 return [value]
 
     def get_providers_from_configuration(self, provider_type):
+        if provider_type == 'some_provider':
+            return ['some_provider']
+
         return []