accept any case of boolean strings

  * previously the str2bool function did not accept 'TRUE' as a bool
    this causes the function to know accept TRUE | FALSE strings
    as a boolean type in order to be converted to a proper boolean.
  * This would also cause Y|N, YES, NO to be accepted as boolean types
    as well.

Author: logicminds

lib/puppet/parser/functions/str2bool.rb

@@ -32,8 +32,8 @@ module Puppet::Parser::Functions
       # We yield false in this case.
       #
       when /^$/, '' then false # Empty string will be false ...
-      when /^(1|t|y|true|yes)$/  then true
-      when /^(0|f|n|false|no)$/  then false
+      when /^(1|t|y|true|yes)$/i  then true
+      when /^(0|f|n|false|no)$/i  then false
       when /^(undef|undefined)$/ then false # This is not likely to happen ...
       else
         raise(Puppet::ParseError, 'str2bool(): Unknown type of boolean given')

spec/functions/str2bool_spec.rb

@@ -10,13 +10,13 @@
   it { is_expected.to run.with_params('one').and_raise_error(Puppet::ParseError, /Unknown type of boolean given/) }
 
   describe 'when testing values that mean "true"' do
-    [ '1', 't', 'y', 'true', 'yes', true ].each do |value|
+    [ 'TRUE','1', 't', 'y', 'true', 'yes', true ].each do |value|
       it { is_expected.to run.with_params(value).and_return(true) }
     end
   end
 
   describe 'when testing values that mean "false"' do
-    [ '', '0', 'f', 'n', 'false', 'no', false, 'undef', 'undefined' ].each do |value|
+    [ 'FALSE','', '0', 'f', 'n', 'false', 'no', false, 'undef', 'undefined' ].each do |value|
       it { is_expected.to run.with_params(value).and_return(false) }
     end
   end