require_relative '../../../spec_helper'

ruby_version_is ''...'2.8' do
  require 'rexml/document'

  # This spec defines Document#add and Document#<<

  describe :rexml_document_add, shared: true do
    before :each do
      @doc  = REXML::Document.new("<root/>")
      @decl = REXML::XMLDecl.new("1.0")
    end

    it "sets document's XML declaration" do
      @doc.send(@method, @decl)
      @doc.xml_decl.should == @decl
    end

    it "inserts XML declaration as first node" do
      @doc.send(@method, @decl)
      @doc.children[0].version.should == "1.0"
    end

    it "overwrites existing XML declaration" do
      @doc.send(@method, @decl)
      @doc.send(@method, REXML::XMLDecl.new("2.0"))
      @doc.xml_decl.version.should == "2.0"
    end

    it "sets document DocType" do
      @doc.send(@method, REXML::DocType.new("transitional"))
      @doc.doctype.name.should == "transitional"
    end

    it "overwrites existing DocType" do
      @doc.send(@method, REXML::DocType.new("transitional"))
      @doc.send(@method, REXML::DocType.new("strict"))
      @doc.doctype.name.should == "strict"
    end

    it "adds root node unless it exists" do
      d = REXML::Document.new("")
      elem = REXML::Element.new "root"
      d.send(@method, elem)
      d.root.should == elem
    end

    it "refuses to add second root" do
      -> { @doc.send(@method, REXML::Element.new("foo")) }.should raise_error(RuntimeError)
    end
  end

  describe "REXML::Document#add" do
    it_behaves_like :rexml_document_add, :add
  end

  describe "REXML::Document#<<" do
    it_behaves_like :rexml_document_add, :<<
  end
end
