[RUBY-35] make sure host tokens are not nil

lib/cassandra/cluster/registry.rb

@@ -149,7 +149,7 @@ def host_lost(address)
       private
 
       def create_host(ip, data)
-        Host.new(ip, data['host_id'], data['rack'], data['data_center'], data['release_version'], data['tokens'].freeze, :up)
+        Host.new(ip, data['host_id'], data['rack'], data['data_center'], data['release_version'], Array(data['tokens']).freeze, :up)
       end
 
       def toggle_up(host)

spec/cassandra/cluster/registry_spec.rb

@@ -0,0 +1,55 @@
+# encoding: utf-8
+
+#--
+# Copyright 2013-2014 DataStax, Inc.
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+# http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+#++
+
+require 'spec_helper'
+
+module Cassandra
+  class Cluster
+    describe(Registry) do
+      let(:logger) { double('logger').as_null_object }
+
+      subject { Registry.new(logger) }
+
+      describe('#host_found') do
+        let(:listener) { double('listener') }
+
+        before do
+          subject.add_listener(listener)
+        end
+
+        context('when host is unknown') do
+          it 'notifies listeners' do
+            expect(listener).to receive(:host_found).once do |host|
+              expect(host.ip).to eq(IPAddr.new('127.0.0.1'))
+              expect(host.tokens).to eq([])
+              expect(host).to be_up
+            end
+
+            expect(listener).to receive(:host_up).once do |host|
+              expect(host.ip).to eq(IPAddr.new('127.0.0.1'))
+              expect(host.tokens).to eq([])
+              expect(host).to be_up
+            end
+
+            subject.host_found(IPAddr.new('127.0.0.1'), {})
+          end
+        end
+      end
+    end
+  end
+end