require 'spec_helper'

describe "OM::XML::Container" do
  
  before(:all) do
    class ContainerTest
      include OM::XML::Container
    end
  end
  
  subject {
    ContainerTest.from_xml("<foo><bar>1</bar></foo>")
  }

  it "should add .ng_xml accessor" do
    subject.should respond_to(:ng_xml)
    subject.should respond_to(:ng_xml=)    
  end

  it "should initialize" do
    ContainerTest.new.ng_xml.should be_a_kind_of Nokogiri::XML::Document
  end
  
  describe "new" do
    it "should populate ng_xml with an instance of Nokogiri::XML::Document" do
      subject.ng_xml.class.should == Nokogiri::XML::Document
    end
  end

  describe "#from_xml" do
    it "should accept a String, parse it and store it in .ng_xml" do
      Nokogiri::XML::Document.expects(:parse).returns("parsed xml")
      container1 = ContainerTest.from_xml("<foo><bar>1</bar></foo>")
      container1.ng_xml.should == "parsed xml"
    end
    it "should accept a File, parse it and store it in .ng_xml" do
      file = fixture(File.join("mods_articles", "hydrangea_article1.xml"))
      Nokogiri::XML::Document.expects(:parse).returns("parsed xml")
      container1 = ContainerTest.from_xml(file)
      container1.ng_xml.should == "parsed xml"
    end
    it "should accept Nokogiri nodes as input and leave them as-is" do
      parsed_xml = Nokogiri::XML::Document.parse("<foo><bar>1</bar></foo>")
      container1 = ContainerTest.from_xml(parsed_xml)
      container1.ng_xml.should == parsed_xml
    end
  end
  
  describe ".to_xml" do
    it  "should call .ng_xml.to_xml" do
      subject.ng_xml.expects(:to_xml).returns("ng xml")
      subject.to_xml.should == "ng xml"
    end
    
    it 'should accept an optional Nokogiri::XML Document as an argument and insert its fields into that (mocked test)' do
      doc = Nokogiri::XML::Document.parse("<test_xml/>")
      mock_new_node = mock("new node")
      doc.root.expects(:add_child).with(subject.ng_xml.root).returns(mock_new_node)
      result = subject.to_xml(doc)
    end
    
    it 'should accept an optional Nokogiri::XML Document as an argument and insert its fields into that (functional test)' do
      doc = Nokogiri::XML::Document.parse("<test_xml/>")
      subject.to_xml(doc).should == "<?xml version=\"1.0\"?>\n<test_xml>\n  <foo>\n    <bar>1</bar>\n  </foo>\n</test_xml>\n"
    end
    
    it 'should add to root of Nokogiri::XML::Documents, but add directly to the elements if a Nokogiri::XML::Node is passed in' do
      mock_new_node = mock("new node")
      mock_new_node.stubs(:to_xml).returns("foo")
      
      doc = Nokogiri::XML::Document.parse("<test_document/>")
      el = Nokogiri::XML::Node.new("test_element", Nokogiri::XML::Document.new)
      doc.root.expects(:add_child).with(subject.ng_xml.root).returns(mock_new_node)
      el.expects(:add_child).with(subject.ng_xml.root).returns(mock_new_node)
      subject.to_xml(doc).should 
      subject.to_xml(el)
    end
  end
  
end