Move packages installation to default

Use attribute node['nodejs']['npm_packages']
Use Hash to provision resource
Rubocop fixes

.kitchen.yml

@@ -71,3 +71,14 @@ suites:
     nodejs:
       npm:
         install_method: source
+- name: npm_packages
+  run_list: recipe[nodejs]
+  attributes:
+    nodejs:
+      npm_packages:
+        - name: express
+        - name: socket.io
+          version: 1.0.4
+        - name: express
+          action: uninstall
+

recipes/default.rb

@@ -20,3 +20,14 @@
 
 include_recipe 'nodejs::nodejs'
 include_recipe 'nodejs::npm'
+
+node['nodejs']['npm_packages'].each do |pkg|
+  f = nodejs_npm pkg['name'] do
+    action :nothing
+  end
+  pkg.reject { |k, _v| k == 'name' || k == 'action' }.each do |key, value|
+    f.send(key, value)
+  end
+  action = pkg.key?('action') ? pkg['action'] : :install
+  f.action(action)
+end if node['nodejs'].key?('npm_packages')

recipes/packages.rb

@@ -1,16 +0,0 @@
-#
-# Author:: Paul Bonaud (paul@bonaud.fr)
-# Cookbook Name:: nodejs
-# Recipe:: packages
-#
-# This recipe gives you the ability to install node packages
-# via chef configuration
-#
-
-if node['nodejs'].has_key?('node_packages')
-  node['nodejs']['node_packages'].each do |node_pkg|
-    nodejs_npm node_pkg['name'] do
-      version node_pkg['version'] if node_pkg.has_key?('version')
-    end if node_pkg.has_key?('name')
-  end
-end