In memory Data Mapper example spec

dm_spec.rb

require 'dm-mapper'
require 'data_mapper/support/veritas/adapter/in_memory'

class Person
  attr_reader :id, :name

  def initialize(attributes)
    @id, @name = attributes.values_at(:id, :name)
  end
end

describe "PersonMapper" do
  before(:all) do
    env = DataMapper::Environment.coerce({in_memory: "in_memory://test"})
    env.build(Person, :in_memory) do
      map :id, Integer, key: true
      map :name, String
    end
    env.finalize
    @mapper = env[Person]
  end

  it "adds a person" do
    # taken from example /data_mapper/relation/mapper.rb:518
    # fails with undefined method `id' for [#<Person:0x00000002812048 @id=1, @name="Jane">]:Array
    # exception occurs in /data_mapper/attribute_set.rb:248
    # @mapper.insert([Person.new(id: 1, name: 'Jane')])

    # no errors if written like this
    @mapper.insert(Person.new(id: 1, name: 'Jane'))

    # but is not inserted
    expect(@mapper.all.size).to eq(1)
  end
end

Need to replace veritas with axiom as it was renamed.