Fixing change printing when list properties are absent

They were throwing an exception when the 'is' value
was 'absent'.

Signed-off-by: Luke Kanies <luke@madstop.com>

2 files changed, 9 insertions, 1 deletions

diff --git a/lib/puppet/property/list.rb b/lib/puppet/property/list.rb
index 0c933f164..b7db8b42a 100644
--- a/lib/puppet/property/list.rb
+++ b/lib/puppet/property/list.rb
@@ -10,7 +10,11 @@ module Puppet
             end
 
             def is_to_s(currentvalue)
-                currentvalue.join(delimiter)
+                if currentvalue == :absent
+                    return "absent"
+                else
+                    return currentvalue.join(delimiter)
+                end
             end
 
             def membership
diff --git a/spec/unit/property/list.rb b/spec/unit/property/list.rb
index 2fab868db..854ab4874 100644
--- a/spec/unit/property/list.rb
+++ b/spec/unit/property/list.rb
@@ -36,6 +36,10 @@ describe list_class do
             @property.is_to_s(["foo","bar"]).should == "foo,bar"
         end
 
+        it "should be able to correctly convert ':absent' to a string" do
+            @property.is_to_s(:absent).should == "absent"
+        end
+
         describe "when adding should to current" do
             it "should add the arrays when current is an array" do
                 @property.add_should_with_current(["foo"], ["bar"]).should == ["foo", "bar"]