Structure of unit tests

game_spec.rb

describe Game do
  it 'should let players to be created' do
    game = Game.new
    game.start

    player = game.createPlayer('Player 1')
    expect(player).to_not be_nil

    game.stop
  end
end

game_spec_assertion.rb

player = game.createPlayer('Player 1')  # invokes the method
expect(player).to_not be_nil            # asserts the result

game_spec_setup.rb

game = Game.new # creates the variable
game.start      # sets up the object state

game_spec_teardown.rb

game.stop # reverts the object to the state before test

test_fixture.rb

describe Game do
  it ‘should let palyers to be created’
  it ‘should keep track of live players’
  it ‘should end the game when a player wins’
end

test_suite.rb

spec/
  - unit/
    - controller/
    - model/
      - game_spec.rb
      - player_spec.rb
      - etc.,
    - service/
  - integration/
    - controller/
    - repository/
    - etc.,