Update Reader.each and Writer.each to depend on Format, not instantialed subclasses, as these may have not been loaded when called.

Author: gkellogg

lib/rdf/reader.rb

@@ -50,7 +50,7 @@ class Reader
     # @yieldparam [Class] klass
     # @return [Enumerator]
     def self.each(&block)
-      @@subclasses.each(&block)
+      RDF::Format.map(&:reader).reject(&:nil?).each(&block)
     end
 
     ##
@@ -195,7 +195,7 @@ def self.open(filename, format: nil, **options, &block)
         if reader
           reader.new(file, options, &block)
         else
-          raise FormatError, "unknown RDF format: #{format_options.inspect}\nThis may be resolved with a require of the 'linkeddata' gem."
+          raise FormatError, "unknown RDF format: #{format_options.inspect}" + ("\nThis may be resolved with a require of the 'linkeddata' gem." unless Object.const_defined?(:LinkedData))
         end
       end
     end

lib/rdf/writer.rb

@@ -61,7 +61,7 @@ class Writer
     # @yieldreturn [void] ignored
     # @return [Enumerator]
     def self.each(&block)
-      @@subclasses.each(&block)
+      RDF::Format.map(&:writer).reject(&:nil?).each(&block)
     end
 
     ##

spec/vocabulary_spec.rb

@@ -4,7 +4,7 @@
   VOCABS = %w(owl rdf rdfs xsd)
   STRICT_VOCABS = %w(owl rdf rdfs)
 
-  context "#new" do
+  context "#initialize" do
     it "should require one argument" do
       expect { RDF::Vocabulary.new }.to raise_error(ArgumentError)
       expect { RDF::Vocabulary.new("http://example.org/") }.not_to raise_error
@@ -34,7 +34,7 @@
     end
   end
 
-  describe "#each" do
+  describe ".each" do
     it "inumerates pre-defined vocabularies" do
       expect {|b| RDF::Vocabulary.each(&b)}.to yield_control.at_least(3).times
       expect(RDF::Vocabulary.each.to_a).to include(RDF, RDF::RDFS, RDF::OWL)