Merge branch 'fix-1773'

Author: jvshahid

CHANGELOG.md

@@ -8,6 +8,7 @@
 ## Bug fixes
 
 * [MRI] Fix regression in installation when building against system libraries, where some systems would not be able to find libxml2 or libxslt when present. (Regression introduced in v1.8.3.) [#1722]
+* [JRuby] Fix node reparenting when the destination doc is empty. [#1773]
 
 
 # 1.8.4 / 2018-07-03

ext/java/nokogiri/XmlNode.java

@@ -33,7 +33,16 @@
 package nokogiri;
 
 import static java.lang.Math.max;
-import static nokogiri.internals.NokogiriHelpers.*;
+import static nokogiri.internals.NokogiriHelpers.clearXpathContext;
+import static nokogiri.internals.NokogiriHelpers.convertEncoding;
+import static nokogiri.internals.NokogiriHelpers.convertString;
+import static nokogiri.internals.NokogiriHelpers.getCachedNodeOrCreate;
+import static nokogiri.internals.NokogiriHelpers.getNokogiriClass;
+import static nokogiri.internals.NokogiriHelpers.isBlank;
+import static nokogiri.internals.NokogiriHelpers.nodeArrayToRubyArray;
+import static nokogiri.internals.NokogiriHelpers.nonEmptyStringOrNil;
+import static nokogiri.internals.NokogiriHelpers.rubyStringToString;
+import static nokogiri.internals.NokogiriHelpers.stringOrNil;
 
 import java.io.ByteArrayInputStream;
 import java.io.InputStream;
@@ -43,18 +52,12 @@
 import java.util.Iterator;
 import java.util.List;
 
-import nokogiri.internals.HtmlDomParserContext;
-import nokogiri.internals.NokogiriHelpers;
-import nokogiri.internals.NokogiriNamespaceCache;
-import nokogiri.internals.SaveContextVisitor;
-import nokogiri.internals.XmlDomParserContext;
-
 import org.apache.xerces.dom.CoreDocumentImpl;
 import org.jruby.Ruby;
 import org.jruby.RubyArray;
 import org.jruby.RubyClass;
-import org.jruby.RubyInteger;
 import org.jruby.RubyFixnum;
+import org.jruby.RubyInteger;
 import org.jruby.RubyModule;
 import org.jruby.RubyObject;
 import org.jruby.RubyString;
@@ -76,6 +79,12 @@
 import org.w3c.dom.NodeList;
 import org.w3c.dom.Text;
 
+import nokogiri.internals.HtmlDomParserContext;
+import nokogiri.internals.NokogiriHelpers;
+import nokogiri.internals.NokogiriNamespaceCache;
+import nokogiri.internals.SaveContextVisitor;
+import nokogiri.internals.XmlDomParserContext;
+
 /**
  * Class for Nokogiri::XML::Node
  *
@@ -1542,6 +1551,10 @@ protected IRubyObject adoptAs(ThreadContext context, AdoptScheme scheme,
          try {
             Document prev = otherNode.getOwnerDocument();
             Document doc = thisNode.getOwnerDocument();
+            if (doc == null && thisNode instanceof Document) {
+              // we are adding the new node to a new empty document
+              doc = (Document) thisNode;
+            }
             clearXpathContext(prev);
             clearXpathContext(doc);
             if (doc != null && doc != otherNode.getOwnerDocument()) {

test/xml/test_node_reparenting.rb

@@ -197,6 +197,17 @@ class TestNodeReparenting < Nokogiri::TestCase
             end
           end
 
+          describe "given the new document is empty" do
+            it "adds the node to the new document" do
+              doc1 = Nokogiri::XML.parse("<value>3</value>")
+              doc2 = Nokogiri::XML::Document.new
+              node = doc1.at_xpath("//value")
+              node.remove
+              doc2.add_child(node)
+              assert_match /<value>3<\/value>/, doc2.to_xml
+            end
+          end
+
           describe "given a parent node with a default namespace" do
             before do
               @doc = Nokogiri::XML(<<-eoxml)