failing-test-rails-issue-20882

failing-test-rails-issue-20882.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', github: 'rails/rails'
  gem 'arel', github: 'rails/arel'
  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, force: true  do |t|
  end

  create_table :comments, force: true  do |t|
    t.integer :post_id
  end
end

class Post < ActiveRecord::Base
  has_many :comments
  # Note that if you use autosave, both tests pass:
  # has_many :comments, autosave: true
end

class Comment < ActiveRecord::Base
  belongs_to :post
  attr_accessor :string
  validates_presence_of :string
end

# Since the comment is marked for destruction, saving the post should not save the comment
class BugTest < Minitest::Test
  def post
    @post ||= Post.new
  end

  def when_i_build_a_valid_comment
    post.comments.build(string: "ABC").mark_for_destruction
  end

  def when_i_build_an_invalid_comment
    post.comments.build.mark_for_destruction
  end

  def expect_the_comment_not_to_be_persisted
    assert_equal 0, Comment.count
  end

  def test_valid_comment
    when_i_build_a_valid_comment
    post.save!
    expect_the_comment_not_to_be_persisted
  end

  def test_invalid_comment
    when_i_build_an_invalid_comment
    post.save!
    expect_the_comment_not_to_be_persisted
  end
end