Provide a way to force it vs its for any argument

Signed-off-by: Alex Pop <apop@chef.io>

lib/inspec/objects/test.rb

@@ -53,7 +53,7 @@ module Inspec
           # this will go in its()
           xres = last_call
         else
-          res += '.' + ruby_qualifier(last)
+          res += '.' + ruby_qualifier(last) unless last_call.empty?
         end
       end
 

test/unit/dsl/objects_test.rb

@@ -8,7 +8,7 @@ require 'inspec/objects'
 describe 'Objects' do
   describe 'Inspec::Test' do
     let(:obj) { Inspec::Test.new }
-    it 'constructs a simple resource+argument' do
+    it 'constructs a simple resource + its("argument")' do
       obj.qualifier = [['resource'], ['version']]
       obj.matcher = 'cmp >='
       obj.expectation = '2.4.2'
@@ -19,6 +19,19 @@ end
 '.strip
     end
 
+    # same as the above test but with it
+    it 'constructs a simple resource.argument' do
+      # [''] forces an 'it' instead of 'its':
+      obj.qualifier = [['resource'], ['version'], ['']]
+      obj.matcher = 'cmp >='
+      obj.expectation = '2.4.2'
+      obj.to_ruby.must_equal '
+describe resource.version do
+  it { should cmp >= "2.4.2" }
+end
+'.strip
+    end
+
     it 'constructs a simple resource+argument with to_s' do
       obj.qualifier = [['resource'], ['to_s']]
       obj.matcher = 'cmp'