fixes bug in resourcetaggingapi/get_kms_tags

tests/test_resourcegroupstaggingapi/test_resourcegroupstaggingapi.py

@@ -248,3 +248,26 @@ def test_get_many_resources():
     )
 
     # TODO test pagenation
+
+
+@mock_kms
+def test_get_kms_tags():
+    kms = boto3.client("kms", region_name="us-east-1")
+    key = kms.create_key(
+        KeyUsage="ENCRYPT_DECRYPT",
+        Tags=[
+            {"TagKey": "key_name", "TagValue": "a_value"},
+            {"TagKey": "key_2", "TagValue": "val2"},
+        ],
+    )
+    key_id = key["KeyMetadata"]["KeyId"]
+
+    rtapi = boto3.client("resourcegroupstaggingapi", region_name="us-east-1")
+    resp = rtapi.get_resources(
+        ResourceTypeFilters=["kms"],
+        TagFilters=[{"Key": "key_name"}],
+    )
+    resp["ResourceTagMappingList"].should.have.length_of(1)
+    resp["ResourceTagMappingList"][0]["Tags"].should.contain(
+        {"Key": "key_name", "Value": "a_value"}
+    )