Verify that vocabulary terms defined in snake_case are not automatically converted to camelCase.

For #385.

Author: gkellogg

spec/vocabulary_spec.rb

@@ -260,6 +260,7 @@
         property :Class
         property :prop
         property :prop2, label: "Test property label", comment: " Test property comment"
+        property :snake_case
       end
     end
 
@@ -272,6 +273,11 @@
         .to eq (test_vocab.to_uri / 'aMissingMethod')
     end
 
+    it "does not camelize if snake-case term found" do
+      expect(test_vocab.snake_case).to be_a(RDF::Vocabulary::Term)
+      expect(test_vocab.snake_case).to eq (test_vocab.to_uri / 'snake_case')
+    end
+
     it "should respond to [] with properties that have been defined" do
       expect(test_vocab[:prop]).to be_a(RDF::URI)
       expect(test_vocab["prop2"]).to be_a(RDF::URI)