In the AR test suite require_dependency does not make much sense. Just
call vanilla require/load.
Note that in the test that made explicit use of it, there are no
autoload paths, and no constants have been autoloaded. In reality, the
code ended up calling Kernel#load.
It was causing error when using `with_options` passing a lambda as its
last argument.
class User < ActiveRecord::Base
with_options dependent: :destroy do |assoc|
assoc.has_many :profiles, -> { where(active: true) }
end
end
It was happening because the `option_merger` was taking the last
argument and checking if it was a Hash. This breaks the HasMany usage,
because its last argument can be a Hash or a Proc.
As the behavior described in this test:
https://github.com/rails/rails/blob/master/activesupport/test/option_merger_test.rb#L69
the method will only accept the lambda, this way it will keep the expected behavior. See 9eaa0a34
