Bug report for ActiveModel 5.2.1 and ActiveAttr

bug.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" }

  gem "activemodel", "5.2.1"
  gem "active_attr"
  gem "shoulda-matchers", github: 'thoughtbot/shoulda-matchers' 
  gem 'minitest-matchers_vaccine'
end

require 'active_support'
require "active_attr"
require 'shoulda-matchers'
require "minitest/autorun"
require "logger"

Shoulda::Matchers.configure do |config|
  config.integrate do |with|
    with.test_framework :minitest
    with.library :active_model
  end
end

class User
  include ActiveAttr::Model

  attribute :account_crn, type: Integer
  attribute :total, type: Integer, default: 0

  validates :account_crn, presence: true, numericality: {only_integer: true}
  validates :total, presence: true, numericality: {greater_than: 0}
end

class BugTest < Minitest::Test
  def test_shoulda_numericality
    user = User.new account_crn: 1, total: 10

    assert_must validate_numericality_of(:account_crn), user
  end

  def test_shoulda_numericality_greater_than
    user = User.new account_crn: 1, total: 10

    assert_must validate_numericality_of(:total).is_greater_than(0), user
  end

  def test_validate_numericality
    user = User.new  account_crn: 1.1, total: 10

    user.validate

    assert_equal ['must be an integer'], user.errors[:account_crn] 
  end
end