add csv support

lib/resources/csv.rb

@@ -0,0 +1,26 @@
+# encoding: utf-8
+
+# Parses a csv document
+# Usage:
+# describe csv('example.csv') do
+#   its('name') { should eq(['John', 'Alice']) }
+# end
+#
+# This implementation was inspired by a blog post
+# @see http://technicalpickles.com/posts/parsing-csv-with-ruby
+class CsvConfig < JsonConfig
+  name 'csv'
+
+  # override file load and parse hash from csv
+  def parse(content)
+    require 'csv'
+    # convert empty field to nil
+    CSV::Converters[:blank_to_nil] = lambda do |field|
+      field && field.empty? ? nil : field
+    end
+    # implicit conversion of values
+    csv = CSV.new(content, headers: true, converters: [:all, :blank_to_nil])
+    # convert to hash
+    csv.to_a.map(&:to_hash)
+  end
+end

lib/resources/json.rb

@@ -1,7 +1,5 @@
 # encoding: utf-8
 
-require 'json'
-
 # Parses a json document
 # Usage:
 # describe yaml('policyfile.lock.json') do
@@ -20,6 +18,7 @@ class JsonConfig < Vulcano.resource(1)
   end
 
   def parse(content)
+    require 'json'
     JSON.parse(content, object_class: OpenStruct)
   end
 

lib/vulcano/resource.rb

@@ -56,5 +56,9 @@ require 'resources/security_policy'
 require 'resources/service'
 require 'resources/ssh_conf'
 require 'resources/windows_feature'
-require 'resources/yaml'
 require 'resources/yum'
+
+# file formats, depend on json implementation
+require 'resources/json'
+require 'resources/yaml'
+require 'resources/csv'

test/helper.rb

@@ -45,6 +45,7 @@ def loadResource (resource, *args)
     '/etc/mysql/my.cnf' => mockfile.('mysql.conf'),
     '/etc/mysql/mysql2.conf' => mockfile.('mysql2.conf'),
     'kitchen.yml' => mockfile.('kitchen.yml'),
+    'example.csv' => mockfile.('example.csv'),
     'policyfile.lock.json' => mockfile.('policyfile.lock.json'),
   }
 

test/unit/resource_csv_test.rb

@@ -0,0 +1,17 @@
+# encoding: utf-8
+
+require 'helper'
+require 'vulcano/resource'
+
+describe 'Vulcano:Resources::CSV' do
+  describe 'cars' do
+
+    let(:resource) { loadResource('csv', 'example.csv') }
+
+    it 'verify csv parsing' do
+      _(resource.params).wont_equal nil
+      _(resource.send('1.addressable')).must_equal 'astrolabe'
+      _(resource.send('addressable')).must_equal %w{ast astrolabe berkshelf}
+    end
+  end
+end