Added acceptance test and updated readme

README.markdown

@@ -224,7 +224,7 @@ Converts the case of a string or of all strings in an array to lowercase. *Type*
 
 #### `empty`
 
-Returns true if the argument is an array or hash that contains no elements, or an empty string. *Type*: rvalue.
+Returns true if the argument is an array or hash that contains no elements, or an empty string. Returns false when the argument is a numerical value. *Type*: rvalue.
 
 #### `ensure_packages`
 

spec/acceptance/empty_spec.rb

@@ -27,6 +27,20 @@ describe 'empty function', :unless => UNSUPPORTED_PLATFORMS.include?(fact('opera
       }
       EOS
 
+      apply_manifest(pp, :catch_failures => true) do |r|
+        expect(r.stdout).to match(/Notice: output correct/)
+      end
+    end
+    it 'handles numerical values' do
+      pp = <<-EOS
+      $a = 7
+      $b = false
+      $o = empty($a)
+      if $o == $b {
+        notify { 'output correct': }
+      }
+      EOS
+
       apply_manifest(pp, :catch_failures => true) do |r|
         expect(r.stdout).to match(/Notice: output correct/)
       end