require 'spec_helper'

module Datacite
  module Mapping
    describe Identifier do

      describe '#initialize' do
        it 'sets the value' do
          value = '10.14749/1407399495'
          id = Identifier.new(value: value)
          expect(id.value).to eq(value)
        end

        it 'sets the type' do
          id = Identifier.new(value: '10.14749/1407399495')
          expect(id.identifier_type).to eq('DOI')
        end

        it 'disallows bad DOIs' do
          bad_dois = %w(
            20.14749/1407399495
            11.14749/1407399495
            10./1407399495
            10.14749\1407399495
            10.14749/
          )
          bad_dois.each do |doi|
            expect { Identifier.new(value: doi) }.to raise_error(ArgumentError)
          end
        end
      end

      describe '#value=' do
        it 'sets the value' do
          id = Identifier.allocate
          id.value = '10.14749/1407399495'
          expect(id.value).to eq('10.14749/1407399495')
        end
        it 'disallows bad DOIs' do
          id = Identifier.allocate
          bad_dois = %w(
            20.14749/1407399495
            11.14749/1407399495
            10./1407399495
            10.14749\1407399495
            10.14749/
          )
          bad_dois.each do |doi|
            expect { id.value = doi }.to raise_error(ArgumentError)
            expect(id.value).to be_nil
          end
        end
      end

      describe '#load_from_xml' do
        it 'parses XML' do
          xml_text = "<identifier identifierType='DOI'>10.14749/1407399498</identifier>"
          xml = REXML::Document.new(xml_text).root
          id = Identifier.load_from_xml(xml)
          expect(id.identifier_type).to eq('DOI')
          expect(id.value).to eq('10.14749/1407399498')
        end
      end

      describe '#save_to_xml' do
        it 'writes XML' do
          id = Identifier.new(value: '10.14749/1407399498')
          xml = id.save_to_xml
          expect(xml).to be_xml("<identifier identifierType='DOI'>10.14749/1407399498</identifier>")
        end
      end

    end
  end
end