adding unit tests for util/conditions.py is_condition_key_match method (

#250)

* fix exception handling in get_action_for_service

* adding unit tests

* rename unit test file

test/util/test_conditions.py

@@ -0,0 +1,27 @@
+import unittest
+from policy_sentry.util.conditions import is_condition_key_match
+
+class ConditionsTestCase(unittest.TestCase):
+    def test_is_condition_key_match_case_1(self):
+        """exact match. return True"""
+        document_key = "s3:prefix"
+        str_to_match = "s3:prefix"
+        self.assertTrue(is_condition_key_match(document_key, str_to_match))
+
+    def test_is_condition_key_match_case_2(self):
+        """no match. return False"""
+        document_key = "s3:prefix"
+        str_to_match = "secretsmanager:SecretId"
+        self.assertFalse(is_condition_key_match(document_key, str_to_match))
+
+    def test_is_condition_key_match_case_3(self):
+        """match with string before $"""
+        document_key = "aws:ResourceTag/${TagKey}"
+        str_to_match = "aws:Resourcetag/${TagKey1}"
+        self.assertTrue(is_condition_key_match(document_key, str_to_match))
+
+    def test_is_condition_key_match_case_4(self):
+        """match with string before <"""
+        document_key = "s3:ExistingObjectTag/<key>"
+        str_to_match = "s3:ExistingObjectTag/<sample-key>"
+        self.assertTrue(is_condition_key_match(document_key, str_to_match))