Merge pull request johnbintz#28 from zspencer/master

Fixed defect with using the Rake Task without having Rails installed

lib/jasmine/headless/task.rb

@@ -42,15 +42,18 @@ def initialize(name = 'jasmine:headless')
             :jasmine_config => @jasmine_config
           )
         end
-
-        if Rails.version >= "3.1.0"
-          desc 'Force generate static assets without an MD5 hash, all assets end with -test.<ext>'
-          task 'assets:precompile:for_testing' => :environment do
-            Rails.application.assets.digest_class = Digest::JasmineTest
-
-            Rake::Task['assets:precompile'].invoke
+        create_rails_compliant_task if defined?(Rails) 
+      end
+      private
+      def create_rails_compliant_task
+          if Rails.version >= "3.1.0"
+            desc 'Force generate static assets without an MD5 hash, all assets end with -test.<ext>'
+            task 'assets:precompile:for_testing' => :environment do
+              Rails.application.assets.digest_class = Digest::JasmineTest
+
+              Rake::Task['assets:precompile'].invoke
+            end
           end
-        end
       end
     end
   end

spec/lib/jasmine/headless/task_spec.rb

@@ -0,0 +1,30 @@
+require 'spec_helper'
+require 'fakefs/spec_helpers'
+require 'jasmine/headless/task'
+
+module Jasmine
+  module Headless
+    class Task
+      def desc(block)
+      end
+      def task(block)
+      end
+    end
+  end
+end
+describe Jasmine::Headless::Task do
+  it 'should not explode when Rails is undefined' do
+    Object.send(:remove_const, :Rails) if defined?(Rails)
+    Jasmine::Headless::Task.new('jasmine:headless') do |t|
+    end
+  end
+  it 'should be OK if rails is defined' do
+    module Rails
+      def self.version
+        return "0"
+      end
+    end
+    Jasmine::Headless::Task.new('jasmine:headless') do |t|
+    end
+  end
+end