From 4909ff339efefe2bdb6d9b6213aa4e80ad867a55 Mon Sep 17 00:00:00 2001
From: MatzFan <bruce.steedman@gmail.com>
Date: Fri, 14 Dec 2018 11:20:27 +0000
Subject: [PATCH] add #value?, plus test

---
 lib/nokogiri/xml/node.rb | 6 ++++++
 test/xml/test_node.rb    | 5 +++++
 2 files changed, 11 insertions(+)

diff --git a/lib/nokogiri/xml/node.rb b/lib/nokogiri/xml/node.rb
index a8a262747f..70da57066d 100644
--- a/lib/nokogiri/xml/node.rb
+++ b/lib/nokogiri/xml/node.rb
@@ -349,6 +349,12 @@ def values
         attribute_nodes.map(&:value)
       end
 
+      ###
+      # Does this Node's attributes include <value>
+      def value?(value)
+        values.include? value
+      end
+
       ###
       # Get the attribute names for this Node.
       def keys
diff --git a/test/xml/test_node.rb b/test/xml/test_node.rb
index 3be93bb003..b9dabe43ec 100644
--- a/test/xml/test_node.rb
+++ b/test/xml/test_node.rb
@@ -644,6 +644,11 @@ def test_values
         assert_equal %w{ Yes Yes }, @xml.xpath('//address')[1].values
       end
 
+      def test_value?
+        refute @xml.xpath('//address')[1].value?('no_such_value')
+        assert @xml.xpath('//address')[1].value?('Yes')
+      end
+
       def test_keys
         assert_equal %w{ domestic street }, @xml.xpath('//address')[1].keys
       end