Add 'without' method

Adds a method 'without' which accepts a list of
parameters that should not be defined in the resource.

Example:

  it { should contain_service('keystone').without(
    ['restart', 'status']
  )}

README.md

@@ -106,6 +106,15 @@ generic `without_<parameter>` chains.
 it { should contain_file('/foo/bar').without_mode }
 ```
 
+You can use the without method to verify that a list of parameters have not been
+defined
+
+```ruby
+it { should contain_service('keystone').without(
+  ['restart', 'status']
+)}
+```
+
 ### Writing tests
 
 #### Basic test structure

lib/rspec-puppet/matchers/create_generic.rb

@@ -14,6 +14,13 @@ module RSpec::Puppet
         @expected_params = (@expected_params || []) | params.to_a
         self
       end
+
+      def without(*args, &block)
+        params = args.shift
+        @expected_undef_params = (@expected_undef_params || []) | params.to_a
+        self
+      end
+
       def method_missing(method, *args, &block)
         if method.to_s =~ /^with_/
           param = method.to_s.gsub(/^with_/, '')

spec/classes/sysctl_common_spec.rb

@@ -17,6 +17,19 @@ describe 'sysctl::common' do
       )
     end
   end
+  describe 'when using without to specify parameter name(s)' do
+    it 'should pass if the parameter name is not contained in the resource' do
+      subject.should contain_exec('sysctl/reload').without('foo')
+    end
+    it 'should pass if the parameter names are not contained in the resource' do
+      subject.should contain_exec('sysctl/reload').without(['foo', 'bar'])
+    end
+    it 'should fail if any of the parameter names are contained in the resource' do
+      expect do
+        subject.should contain_exec('sysctl/reload').without(['foo', 'returns'])
+      end.should raise_error(RSpec::Expectations::ExpectationNotMetError)
+    end
+  end
 end
 
 describe 'sysctl::common' do