Test unitário em Rails

Rspec unitario

RSpec.describe Rental, type: :model do
  context 'create a user new' do
    it 'User is valid?' do
      user = User.new(name: 'Roberson', email: 'roberson@gmail")

      expect(user.valid?).to be_truthy
    end
    
    it 'User is invalid?' do
      user = User.new(name: 'Roberson', email: nil)

      expect(user.valid?).to be_falsey
    end
  end