add testing dependencies

Gemfile

@@ -0,0 +1,13 @@
+source "http://rubygems.org"
+
+if ENV.key?('PUPPET_VERSION')
+  puppetversion = "= #{ENV['PUPPET_VERSION']}"
+else
+  puppetversion = ['~> 2.7']
+end
+
+gem "rake"
+gem "puppet", puppetversion
+gem "puppet-lint"
+gem "rspec-puppet"
+gem "puppetlabs_spec_helper"

Gemfile.lock

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+GEM
+  remote: http://rubygems.org/
+  specs:
+    diff-lcs (1.2.2)
+    facter (1.6.18)
+    metaclass (0.0.1)
+    mocha (0.13.3)
+      metaclass (~> 0.0.1)
+    puppet (2.7.21)
+      facter (~> 1.5)
+    puppet-lint (0.3.2)
+    puppetlabs_spec_helper (0.4.1)
+      mocha (>= 0.10.5)
+      rake
+      rspec (>= 2.9.0)
+      rspec-puppet (>= 0.1.1)
+    rake (10.0.4)
+    rspec (2.13.0)
+      rspec-core (~> 2.13.0)
+      rspec-expectations (~> 2.13.0)
+      rspec-mocks (~> 2.13.0)
+    rspec-core (2.13.1)
+    rspec-expectations (2.13.0)
+      diff-lcs (>= 1.1.3, < 2.0)
+    rspec-mocks (2.13.0)
+    rspec-puppet (0.1.6)
+      rspec
+
+PLATFORMS
+  ruby
+
+DEPENDENCIES
+  puppet (~> 2.7)
+  puppet-lint
+  puppetlabs_spec_helper
+  rake
+  rspec-puppet