Move ResolverError over to exceptions where it seems to be long.

connexion/exceptions.py

@@ -16,6 +16,10 @@ class ConnexionException(Exception):
     pass
 
 
+class ResolverError(LookupError):
+    pass
+
+
 class InvalidSpecification(ConnexionException):
     def __init__(self, reason='Unknown Reason'):
         """

connexion/resolver.py

@@ -15,14 +15,11 @@ import logging
 import re
 
 import connexion.utils as utils
+from connexion.exceptions import ResolverError
 
 logger = logging.getLogger('connexion.resolver')
 
 
-class ResolverError(LookupError):
-    pass
-
-
 class Resolution(object):
     def __init__(self, function, operation_id):
         """

tests/test_api.py

@@ -4,7 +4,7 @@ import pathlib
 import tempfile
 
 from connexion.api import Api
-from connexion.resolver import ResolverError
+from connexion.exceptions import ResolverError
 from swagger_spec_validator.common import SwaggerValidationError
 from yaml import YAMLError
 

tests/test_resolver.py

@@ -1,6 +1,7 @@
 import connexion.app
 from connexion.operation import Operation
-from connexion.resolver import Resolver, RestyResolver, ResolverError
+from connexion.exceptions import ResolverError
+from connexion.resolver import Resolver, RestyResolver
 
 import pytest