Migration spec for adding father_deceased to Orphan and populating it with opposite values of existing father_alive column

add_father_deceased_to_orphan_spec.rb

#TODO Remove this brittle spec after it proves that the migration works

require 'rails_helper'

migration_file_name = '20150307173710_add_father_deceased_to_orphans.rb'

migration_file_path = Rails.root.join 'db', 'migrate', migration_file_name
version = migration_file_name.split('_').first

require migration_file_path

describe AddFatherDeceasedToOrphans do

  let(:migration) { AddFatherDeceasedToOrphans.new }

  before(:each) do
    migration.down
  end

  describe '#up' do
    before(:each) do
      @father_alive_orphan = create :orphan, father_alive: true
      @father_deceased_orphan = create :orphan, father_alive: false,
        date_of_birth: 2.years.ago, father_date_of_death: 1.year.ago

      migration.up
      Orphan.reset_column_information
    end

    it 'sets father_deceased based on existing father_alive value' do
      expect(@father_alive_orphan.reload.father_deceased).to eq false
      expect(@father_deceased_orphan.reload.father_deceased).to eq true
    end
  end

  def migration_has_been_run?(version)
    query = "SELECT version FROM schema_migrations WHERE version = '#{version}'"
    ActiveRecord::Base.connection.execute(query).any?
  end
end