# Copyright (c) 2011 - 2013, SoundCloud Ltd., Rany Keddo, Tobias Bielohlawek, Tobias
# Schmidt

require File.expand_path(File.dirname(__FILE__)) + '/unit_helper'

require 'lhm/table'
require 'lhm/migrator'

describe Lhm::Intersection do
  include UnitHelper

  it 'should not have dropped changes' do
    origin = Lhm::Table.new('origin')
    origin.columns['dropped']  = varchar
    origin.columns['retained'] = varchar

    destination = Lhm::Table.new('destination')
    destination.columns['retained'] = varchar

    intersection = Lhm::Intersection.new(origin, destination)
    intersection.destination.include?('dropped').must_equal(false)
  end

  it 'should have unchanged columns' do
    origin = Lhm::Table.new('origin')
    origin.columns['dropped']  = varchar
    origin.columns['retained'] = varchar

    destination = Lhm::Table.new('destination')
    destination.columns['retained'] = varchar

    intersection = Lhm::Intersection.new(origin, destination)
    intersection.destination.must_equal(['retained'])
  end

  it 'should have renamed columns' do
    origin = Lhm::Table.new('origin')
    origin.columns['old_name']  = varchar

    destination = Lhm::Table.new('destination')
    destination.columns['new_name'] = varchar

    intersection = Lhm::Intersection.new(origin, destination, { 'old_name' => 'new_name' })
    intersection.origin.must_equal(['old_name'])
    intersection.destination.must_equal(['new_name'])
  end

  def varchar
    { :metadata => 'VARCHAR(255)' }
  end
end