Test case for "bad value for range" error in activerecord 5.2.0.beta2 with PostgreSQL RANGE type. https://github.com/rails/rails/issues/31612

test.rb

# frozen_string_literal: true

PG_DATABASE_NAME = "test_ar_range"

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.beta2"
  # gem "activerecord", "5.1.4"
  gem "pg"
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: "postgresql",
  encoding: "unicode",
  database: PG_DATABASE_NAME
)
ActiveRecord::Base.logger = Logger.new(STDOUT)

ActiveRecord::Schema.define do
  create_table :posts, force: true do |t|
    t.int4range :range
  end
end

class Post < ActiveRecord::Base
end

class BugTest < Minitest::Test
  def test_association_stuff
    post = Post.create!(range: 1..Float::INFINITY)

    assert_equal true, post.persisted?
  end
end