Add tests for new bottling hooks.
user
```ruby
require 'testing_env'
require 'formula_installer'
require 'hooks/bottles'

class BottleHookTests < Test::Unit::TestCase
  class FormulaDouble
    def bottle; end
    def local_bottle_path; end
    def some_random_method; true; end
  end

  def setup
    @fi = FormulaInstaller.new FormulaDouble.new
  end

  def test_has_bottle
    Homebrew::Hooks::Bottles.setup_formula_has_bottle do |f|
      f.some_random_method
    end
    assert_equal true, @fi.pour_bottle?
  end

  def test_has_no_bottle
    Homebrew::Hooks::Bottles.setup_formula_has_bottle do |f|
      !f.some_random_method
    end
    assert_equal false, @fi.pour_bottle?
  end

  def test_pour_formula_bottle
    Homebrew::Hooks::Bottles.setup_formula_has_bottle do |f|
      true
    end

    Homebrew::Hooks::Bottles.setup_pour_formula_bottle do |f|
      f.some_random_method
    end
    @fi.pour
  end
end
```
assistant