From 022d8e0ada4081b81835e929507ed826da880098 Mon Sep 17 00:00:00 2001
From: Yorick Peterse <yorickpeterse@gmail.com>
Date: Wed, 27 Aug 2014 23:07:38 +0200
Subject: [PATCH] Extra test for sum() for default return values.

---
 spec/oga/xpath/evaluator/calls/sum_spec.rb | 4 ++++
 1 file changed, 4 insertions(+)

diff --git a/spec/oga/xpath/evaluator/calls/sum_spec.rb b/spec/oga/xpath/evaluator/calls/sum_spec.rb
index dadaf43..467a134 100644
--- a/spec/oga/xpath/evaluator/calls/sum_spec.rb
+++ b/spec/oga/xpath/evaluator/calls/sum_spec.rb
@@ -15,5 +15,9 @@ describe Oga::XPath::Evaluator do
     example 'return the sum of the child nodes of the <root> node' do
       @evaluator.evaluate('sum(root/*)').should == 3.0
     end
+
+    example 'return zero by default' do
+      @evaluator.evaluate('sum(foo)').should be_zero
+    end
   end
 end