require 'rails_helper'
class TestUser
  def speak
    :speak
  end
  def eat
    :eat
  end
end

RSpec.describe 'Partial test doubles' do
  let(:user) { TestUser.new }

  context 'when stubs are applied' do
    it 'applies test behavior for stubbed methods' do
      allow(user).to receive(:speak).and_return(:yell)

      expect(user.speak).to eq(:yell)
    end

    it 'skips test behavior for non stubbed methods' do
      allow(user).to receive(:speak).and_return(:yell)

      expect(user.eat).to eq(:eat)
    end
  end

  context 'when mocks are applied' do
    it 'applies test behavior for mocked methods' do
      expect(user).to receive(:speak).and_return(:yell)

      expect(user.speak).to eq(:yell)
    end

    it 'skips test behavior for non mocked methods' do
      expect(user).not_to receive(:speak)

      expect(user.eat).to eq(:eat)
    end
  end
end