werewolf_test.rb

gem 'minitest', '~> 5.2'
require 'minitest/autorun'
require 'minitest/pride'
require_relative 'werewolf'

class WerewolfTest < Minitest::Test
  def test_it_has_a_name
    werewolf = Werewolf.new("David")
    assert_equal "David", werewolf.name
  end

  def test_it_has_a_location
    werewolf = Werewolf.new("David","London")
    assert_equal "London", werewolf.location
  end

  def test_it_is_by_default_in_human_form
    werewolf = Werewolf.new("David","London")
    assert werewolf.human?
  end

  def test_it_can_change
    werewolf = Werewolf.new("David","London")
    assert werewolf.respond_to?(:change!)
  end

  def test_when_starting_as_a_human_changing_means_it_is_no_longer_human
    werewolf = Werewolf.new("David","London")
    werewolf.change!
    refute werewolf.human?
  end

  def test_when_starting_as_a_human_changing_turns_it_into_a_werewolf
    werewolf = Werewolf.new("David","London")
    werewolf.change!
    assert werewolf.werewolf?
  end

  def test_when_starting_as_a_human_changing_a_second_time_it_becomes_human_again
    werewolf = Werewolf.new("David","London")
    assert werewolf.human?
    werewolf.change!
    werewolf.change!
    assert werewolf.human?
  end

  def test_when_starting_as_a_werewolf_changing_a_second_time_it_becomes_werewolf_again
    werewolf = Werewolf.new("David","London")
    werewolf.change!
    assert werewolf.werewolf?
    werewolf.change!
    werewolf.change!
    assert werewolf.werewolf?
  end

end