require 'spec_helper'
require 'fileutils'
require 'tmpdir'

module RevealCK
  module Changers
    describe Splicer do

      describe '.insert!' do

        let :before_insert do
          spec_data 'changers', 'splicer', 'before_insert'
        end

        let :abcd do
          spec_data 'changers', 'splicer', 'abcd'
        end

        let :after_insert do
          spec_data 'changers', 'splicer', 'after_insert'
        end

        it 'inserts one file into another' do
          Dir.mktmpdir do |tmp_dir|
            FileUtils.cp before_insert, tmp_dir
            test_file = File.join tmp_dir, 'before_insert'
            Splicer.insert! abcd, into: test_file, after: '3'
            test_file_contents = File.open(test_file).read
            after_insert_contents = File.open(after_insert).read
            test_file_contents.should == after_insert_contents
          end
        end
      end

      describe '#insert' do
        it 'inserts lines after a match' do
          original = ['0', '1', '2', '3']
          splicer = Splicer.new original
          result = splicer.insert ['a', 'b', 'c'], after: '2'
          result.should == ['0', '1', '2', 'a', 'b', 'c', '3']
        end
      end
    end
  end
end