test.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 'sqlite3'
end

require 'active_record'
require 'active_support'
require 'active_support/core_ext/object/blank'
require 'minitest/autorun'

Minitest::Test = MiniTest::Unit::TestCase unless defined?(Minitest::Test)

ActiveRecord::Base.establish_connection(adapter: 'sqlite3', database: ':memory:')
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :authors, force: true do |t|
    t.string  :name
    t.integer :age
  end
end

class Author < ActiveRecord::Base
  attribute :does_not_exist, ActiveRecord::Type::String.new
end

class BugTest < ActiveSupport::TestCase
  def test_raises_an_exception_when_partial_write_is_disabled
    ActiveRecord::Base.partial_writes = false

    assert_raises_with_message(ActiveRecord::StatementInvalid, /table authors has no column named does_not_exist/) do
      Author.create!(name: 'john', age: 18)
    end
  end

  def test_doesnt_raise_when_partial_write_is_enabled
    assert_nothing_raised do
      Author.create!(name: 'john', age: 18)
    end
  end

  private

  def assert_raises_with_message(exception_class, message, &block)
    err = assert_raises(exception_class) { block.call }
    assert_match message, err.message
  end
end