Test after_destroy is not called on has_many through #27099 on 4.7.2

issue_27099.rb

begin
  require "bundler/inline"
rescue LoadError => e
  $stderr.puts "Bundler version 1.10 or later is required. Please update your Bundler"
  raise e
end

gemfile(true) do
  source "https://rubygems.org"
  gem "rails", "4.7.2" #github: "rails/rails"
  gem "sqlite3"
end

require "active_record"
require "minitest/autorun"
require "logger"

# This connection will do for database-independent bug reports.
ActiveRecord::Base.establish_connection(adapter: "sqlite3", database: ":memory:")
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :posts do |t|
  end

  create_table :posts_tags do |t|
    t.integer :post_id
    t.integer :tag_id
  end

  create_table :tags do |t|
  end

  create_table :signs do |t|
  end
end

class Sign < ActiveRecord::Base
end

class Post < ActiveRecord::Base
  has_many :posts_tags
  has_many :tags, through: :posts_tags
end

class PostsTag < ActiveRecord::Base
  belongs_to :post
  belongs_to :tag

  after_destroy :create_sign
  after_create :create_sign

  private

  def create_sign
    Sign.create
  end
end

class Tag < ActiveRecord::Base
  has_many :posts_tags
  has_many :posts, through: :posts_tags
end

class BugTest < Minitest::Test
  def test_after_destroy_on_has_many_through
    post = Post.create!
    post.tags << Tag.create!
    post.tags << Tag.create!

    assert_equal 2, Post.first.tags.count
    assert_equal 2, PostsTag.count
    assert_equal 2, Tag.count
    assert_equal 2, Sign.count
    assert_equal post.id, Tag.first.posts.first.id

    post.tags.destroy(Tag.first)
    assert_equal 1, Post.first.tags.count
    assert_equal 1, PostsTag.count
    assert_equal 3, Sign.count
  end
end