Executable test for Rails issue #32940

activerecord_executable_test_32940.rb

# frozen_string_literal: true

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"

  git_source(:github) { |repo| "https://github.com/#{repo}.git" }

  # Activate the gem you are reporting the issue against.
  gem "activerecord", "5.2.0"
  gem "sqlite3"
end

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

# Ensure backward compatibility with Minitest 4
Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

# 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 :parents do |t|
  end

  create_table :children, force: true do |t|
    t.string :name
    t.references :parent, foreign_key: true
  end
end

class Parent < ApplicationRecord::Base
  has_many :children
end

class Child < ApplicationRecord::Base
  belongs_to :parent
  validates :name, uniqueness: true
end

class BugTest < Minitest::Test
  def test_save_with_duplicates_fails
    Child.delete_all
    parent = Parent.new(children: [Child.new(name: 'Wiske'), Child.new(name: 'Wiske')])
    parent.save

    assert parent.errors.any?
  end
end