Merge branch 'v1' of github.com:flavorjones/arel into v1

* 'v1' of github.com:flavorjones/arel:
  DeleteStatement deep copy
  cleaning up describe/it block names
  SelectCore deep copies attributes
  Statement nodes deep-copy AST nodes
  TreeManager classes deep-copy their statements.

1 files changed, 11 insertions, 0 deletions

diff --git a/spec/arel/select_manager_spec.rb b/spec/arel/select_manager_spec.rb
index 331d9714a7..bf4ce2e13f 100644
--- a/spec/arel/select_manager_spec.rb
+++ b/spec/arel/select_manager_spec.rb
@@ -208,5 +208,16 @@ module Arel
         manager.to_sql.should be_like 'SELECT "users"."id" FROM "users"'
       end
     end
+
+    describe "TreeManager" do
+      subject do
+        table   = Table.new :users
+        Arel::SelectManager.new(Table.engine).tap do |manager|
+          manager.from(table).project(table['id'])
+        end
+      end
+
+      it_should_behave_like "TreeManager"
+    end
   end
 end