Make an empty document parse okay rather than error out.

Author: gkellogg

lib/rdf/rdfxml/reader.rb

@@ -158,8 +158,11 @@ def initialize(input = $stdin, **options, &block)
         input.rewind if input.respond_to?(:rewind)
         initialize_xml(input, **options) rescue log_fatal($!.message)
 
-        log_error("Empty document") if root.nil?
-        log_error("Synax errors") {doc_errors} if !doc_errors.empty?
+        if root.nil?
+          log_info("Empty document")
+        elsif !doc_errors.empty?
+          log_error("Synax errors") {doc_errors}
+        end
 
         block.call(self) if block_given?
       end

spec/reader_spec.rb

@@ -14,6 +14,11 @@
     let(:reader_input) {File.read(doap)}
     let(:reader) {RDF::RDFXML::Reader.new(reader_input)}
     let(:reader_count) {File.open(doap_nt).each_line.to_a.length}
+    let(:reader_invalid_input) {%(
+      <rdf:RDF xmlns:rdf="http://www.w3.org/1999/02/22-rdf-syntax-ns#">
+       <rdf:Description rdf:ID='333-555-666' />
+      </rdf:RDF>
+    )}
   end
 
   context "discovery" do