inject_or_stack_level_too_deep.rb

# frozen_string_literal: true

require "bundler/inline"

gemfile(true) do
  source "https://rubygems.org"

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

  gem "rails", github: "rails/rails"
  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
end

class Post < ActiveRecord::Base
end

class BugTest < Minitest::Test
  def test_ok
    posts = (0..10).to_a.map { |i| Post.where(id: i) }.inject { |res, scope| res.or(scope) }

    assert_equal posts.count, 0
  end

  def test_parser_stack_overflow
    posts = (0..100).to_a.map { |i| Post.where(id: i) }.inject { |res, scope| res.or(scope) }

    assert_equal posts.count, 0
  end

  def test_stack_level_too_deep
    posts = (0..1000).to_a.map { |i| Post.where(id: i) }.inject { |res, scope| res.or(scope) }

    assert_equal posts.count, 0
  end
end