Chore: write nameable class unit test

spec/nameable_spec.rb

@@ -0,0 +1,18 @@
+require_relative 'spec_helper'
+require_relative '../nameable.rb'
+
+describe Nameable do
+  describe '#correct_name' do
+    it 'should raise Error upon exception' do
+      expect { Nameable.new.correct_name }.to raise_error('Error')
+    end 
+  end  
+end
+
+# end  
+
+# class Nameable
+#   def correct_name
+#     raise NotImplementedError, 'Error'
+#   end
+# end