[ Ruby / Minitest ] Example of mocking + stubbing in minitest

minitest_mock_and_stub_combo.rb

require 'minitest/autorun'

class Origin
  attr_accessor :name

  def set_name name
    self.name = name
  end

end

class Character
  attr_accessor :name, :origin

  def initialize name
    self.origin  = Origin.new
    self.name    = name
  end

  def name_origin
    origin.set_name name
  end

  def self.make name
    new(name).name_origin
  end

end

describe Character do
  let(:name) { "Bob" }
  let(:mock_arguments) { [name] }
  let(:mock) { MiniTest::Mock.new }
  let(:origin_instance) { Origin.new }

  it "creates a new origin for itself" do
    mock.expect :set_name, origin_instance, mock_arguments
    Origin.stub(:new, mock) { Character.make name }
    mock.verify
  end
end