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require "cases/helper"
class CallbacksTest < ActiveModel::TestCase
class CallbackValidator
def around_create(model)
model.callbacks << :before_around_create
yield
model.callbacks << :after_around_create
end
end
class ModelCallbacks
attr_reader :callbacks
extend ActiveModel::Callbacks
define_model_callbacks :create
define_model_callbacks :initialize, :only => :after
before_create :before_create
around_create CallbackValidator.new
after_create do |model|
model.callbacks << :after_create
end
after_create "@callbacks << :final_callback"
def initialize(valid=true)
@callbacks, @valid = [], valid
end
def before_create
@callbacks << :before_create
end
def create
_run_create_callbacks do
@callbacks << :create
@valid
end
end
end
test "complete callback chain" do
model = ModelCallbacks.new
model.create
assert_equal model.callbacks, [ :before_create, :before_around_create, :create,
:after_around_create, :after_create, :final_callback]
end
test "after callbacks are always appended" do
model = ModelCallbacks.new
model.create
assert_equal model.callbacks.last, :final_callback
end
test "after callbacks are not executed if the block returns false" do
model = ModelCallbacks.new(false)
model.create
assert_equal model.callbacks, [ :before_create, :before_around_create,
:create, :after_around_create]
end
test "only selects which types of callbacks should be created" do
assert !ModelCallbacks.respond_to?(:before_initialize)
assert !ModelCallbacks.respond_to?(:around_initialize)
assert ModelCallbacks.respond_to?(:after_initialize)
end
end
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