# File lib/fog/aws/requests/compute/replace_network_acl_association.rb, line 31
        def replace_network_acl_association(association_id, network_acl_id)
          response = Excon::Response.new
          if self.data[:network_acls][network_acl_id]
            # find the old assoc
            old_nacl = self.data[:network_acls].values.find do |n|
              n['associationSet'].find { |assoc| assoc['networkAclAssociationId'] == association_id }
            end

            unless old_nacl
              raise Fog::Compute::AWS::Error.new("Invalid association_id #{association_id}")
            end

            subnet_id = old_nacl['associationSet'].find { |assoc| assoc['networkAclAssociationId'] == association_id }['subnetId']
            old_nacl['associationSet'].delete_if { |assoc| assoc['networkAclAssociationId'] == association_id }

            id = Fog::AWS::Mock.network_acl_association_id
            self.data[:network_acls][network_acl_id]['associationSet'] << {
              'networkAclAssociationId' => id,
              'networkAclId'            => network_acl_id,
              'subnetId'                => subnet_id,
            }

            response.status = 200
            response.body = {
              'requestId'        => Fog::AWS::Mock.request_id,
              'newAssociationId' => id
            }
            response
          else
            raise Fog::Compute::AWS::NotFound.new("The network ACL '#{network_acl_id}' does not exist")
          end
        end