src/railties/test/isolation/abstract_unit.rb
# frozen_string_literal: true

# Note:
# It is important to keep this file as light as possible
# the goal for tests that require this is to test booting up
# Rails from an empty state, so anything added here could
# hide potential failures
#
# It is also good to know what is the bare minimum to get
# Rails booted up.
require "fileutils"
require "shellwords"

require "bundler/setup" unless defined?(Bundler)
require "active_support"
require "active_support/testing/autorun"
require "active_support/testing/stream"
require "active_support/testing/method_call_assertions"
require "active_support/test_case"
require "minitest/retry"

if ENV["BUILDKITE"]
  Minitest::Retry.use!(verbose: false, retry_count: 1)
end

require_relative "../../../tools/test_common"

RAILS_FRAMEWORK_ROOT = File.expand_path("../../..", __dir__)

# These files do not require any others and are needed
# to run the tests
require "active_support/core_ext/object/blank"
require "active_support/testing/isolation"
require "active_support/core_ext/kernel/reporting"
require "tmpdir"

module TestHelpers
  module Paths
    def app_template_path
      File.join RAILS_FRAMEWORK_ROOT, "tmp/templates/app_template"
    end

    def bootsnap_cache_path
      File.join RAILS_FRAMEWORK_ROOT, "tmp/templates/bootsnap"
    end

    def tmp_path(*args)
      @tmp_path ||= File.realpath(Dir.mktmpdir(nil, File.join(RAILS_FRAMEWORK_ROOT, "tmp")))
      File.join(@tmp_path, *args)
    end

    def app_path(*args)
      path = tmp_path(*%w[app] + args)
      if block_given?
        yield path
      else
        path
      end
    end

    def framework_path
      RAILS_FRAMEWORK_ROOT
    end

    def rails_root
      app_path
    end
  end

  module Rack
    def app(env = "production")
      old_env = ENV["RAILS_ENV"]
      @app ||= begin
        ENV["RAILS_ENV"] = env

        require "#{app_path}/config/environment"

        Rails.application
      end
    ensure
      ENV["RAILS_ENV"] = old_env
    end

    def extract_body(response)
      (+"").tap do |body|
        response[2].each { |chunk| body << chunk }
      end
    end

    def get(path)
      @app.call(::Rack::MockRequest.env_for(path))
    end

    def assert_welcome(resp)
      resp = Array(resp)

      assert_equal 200, resp[0]
      assert_match "text/html", resp[1]["Content-Type"]
      assert_match "charset=utf-8", resp[1]["Content-Type"]
      assert extract_body(resp).match(/Rails version:/)
    end
  end

  module Generation
    # Build an application by invoking the generator and going through the whole stack.
    def build_app(options = {})
      @prev_rails_app_class = Rails.app_class
      @prev_rails_application = Rails.application
      Rails.app_class = Rails.application = nil

      @prev_rails_env = ENV["RAILS_ENV"]
      ENV["RAILS_ENV"] = "development"

      FileUtils.rm_rf(app_path)
      FileUtils.cp_r(app_template_path, app_path)

      # Delete the initializers unless requested
      unless options[:initializers]
        Dir["#{app_path}/config/initializers/**/*.rb"].each do |initializer|
          File.delete(initializer)
        end
      end

      File.open("#{app_path}/config/database.yml", "w") do |f|
        if options[:multi_db]
          f.puts multi_db_database_configs
        else
          f.puts default_database_configs
        end
      end

      add_to_config <<-RUBY
        config.hosts << proc { true }
        config.eager_load = false
        config.session_store :cookie_store, key: "_myapp_session"
        config.cache_store = :mem_cache_store
        config.active_support.deprecation = :log
        config.action_controller.allow_forgery_protection = false
      RUBY

      add_to_env_config :development, "config.action_view.annotate_rendered_view_with_filenames = false"

      remove_from_env_config("development", "config.generators.apply_rubocop_autocorrect_after_generate!")
      add_to_env_config :production, "config.log_level = :error"
    end

    def teardown_app
      ENV["RAILS_ENV"] = @prev_rails_env if @prev_rails_env
      Rails.app_class = @prev_rails_app_class if @prev_rails_app_class
      Rails.application = @prev_rails_application if @prev_rails_application
      FileUtils.rm_rf(tmp_path)
    end

    def default_database_configs
      <<-YAML
        default: &default
          adapter: sqlite3
          max_connections: 5
          timeout: 5000
        development:
          <<: *default
          database: storage/development.sqlite3
        test:
          <<: *default
          database: storage/test.sqlite3
        production:
          <<: *default
          database: storage/production.sqlite3
      YAML
    end

    def multi_db_database_configs
      <<-YAML
        default: &default
          adapter: sqlite3
          max_connections: 5
          timeout: 5000
          variables:
            statement_timeout: 1000
        development:
          primary:
            <<: *default
            database: storage/development.sqlite3
          primary_readonly:
            <<: *default
            database: storage/development.sqlite3
            replica: true
          animals:
            <<: *default
            database: storage/development_animals.sqlite3
            migrations_paths: db/animals_migrate
          animals_readonly:
            <<: *default
            database: storage/development_animals.sqlite3
            migrations_paths: db/animals_migrate
            replica: true
        test:
          primary:
            <<: *default
            database: storage/test.sqlite3
          primary_readonly:
            <<: *default
            database: storage/test.sqlite3
            replica: true
          animals:
            <<: *default
            database: storage/test_animals.sqlite3
            migrations_paths: db/animals_migrate
          animals_readonly:
            <<: *default
            database: storage/test_animals.sqlite3
            migrations_paths: db/animals_migrate
            replica: true
        production:
          primary:
            <<: *default
            database: storage/production.sqlite3
          primary_readonly:
            <<: *default
            database: storage/production.sqlite3
            replica: true
          animals:
            <<: *default
            database: storage/production_animals.sqlite3
            migrations_paths: db/animals_migrate
          animals_readonly:
            <<: *default
            database: storage/production_animals.sqlite3
            migrations_paths: db/animals_migrate
            replica: true
      YAML
    end

    def with_unhealthy_database(&block)
      # The existing schema cache dump will contain ActiveRecord::ConnectionAdapters::SQLite3Adapter objects
      require "active_record/connection_adapters/sqlite3_adapter"

      # We need to change the `database_version` to match what is expected for MySQL
      dump_path = File.join(app_path, "db/schema_cache.yml")
      if File.exist?(dump_path)
        schema_cache = ActiveRecord::ConnectionAdapters::SchemaCache._load_from(dump_path)
        schema_cache.instance_variable_set(:@database_version, ActiveRecord::ConnectionAdapters::AbstractAdapter::Version.new("8.8.8"))
        File.write(dump_path, YAML.dump(schema_cache))
      end

      # We load the app while pointing at a non-existing MySQL server
      switch_env("DATABASE_URL", "mysql2://127.0.0.1:1", &block)
    end

    # Make a very basic app, without creating the whole directory structure.
    # This is faster and simpler than the method above.
    def make_basic_app
      require "rails"
      require "action_controller/railtie"
      require "action_view/railtie"

      @app = Class.new(Rails::Application) do
        def self.name; "RailtiesTestApp"; end
      end
      @app.config.hosts << proc { true }
      @app.config.eager_load = false
      @app.config.session_store :cookie_store, key: "_myapp_session"
      @app.config.active_support.deprecation = :log
      @app.config.log_level = :error
      @app.config.secret_key_base = "b3c631c314c0bbca50c1b2843150fe33"
      @app.config.active_support.to_time_preserves_timezone = :zone

      yield @app if block_given?
      @app.initialize!

      @app.routes.draw do
        get "/" => "omg#index"
      end

      require "rack/test"
      extend ::Rack::Test::Methods
    end

    def simple_controller
      controller :foo, <<-RUBY
        class FooController < ApplicationController
          def index
            render plain: "foo"
          end
        end
      RUBY

      app_file "config/routes.rb", <<-RUBY
        Rails.application.routes.draw do
          get ':controller(/:action)'
        end
      RUBY
    end

    class Bukkit
      attr_reader :path

      def initialize(path)
        @path = path
      end

      def write(file, string)
        path = "#{@path}/#{file}"
        FileUtils.mkdir_p(File.dirname(path))
        File.open(path, "w") { |f| f.puts string }
      end

      def delete(file)
        File.delete("#{@path}/#{file}")
      end
    end

    def engine(name)
      dir = "#{app_path}/random/#{name}"
      FileUtils.mkdir_p(dir)

      app = File.readlines("#{app_path}/config/application.rb")
      app.insert(4, "$:.unshift(\"#{dir}/lib\")")
      app.insert(5, "require #{name.inspect}")

      File.open("#{app_path}/config/application.rb", "r+") do |f|
        f.puts app
      end

      Bukkit.new(dir).tap do |bukkit|
        yield bukkit if block_given?
      end
    end

    # Invoke a bin/rails command inside the app
    #
    # allow_failure:: true to return normally if the command exits with
    #   a non-zero status. By default, this method will raise.
    # stderr:: true to pass STDERR output straight to the "real" STDERR.
    #   By default, the STDERR and STDOUT of the process will be
    #   combined in the returned string.
    def rails(*args, allow_failure: false, stderr: false)
      args = args.flatten
      fork = true

      command = "bin/rails #{Shellwords.join args}#{' 2>&1' unless stderr}"

      # Don't fork if the environment has disabled it
      fork = false if ENV["NO_FORK"]

      # Don't fork if the runtime isn't able to
      fork = false if !Process.respond_to?(:fork)

      # Don't fork if we're re-invoking minitest
      fork = false if args.first == "t" || args.grep(/\Atest(:|\z)/).any?

      if fork
        out_read, out_write = IO.pipe
        if stderr
          err_read, err_write = IO.pipe
        else
          err_write = out_write
        end

        pid = fork do
          out_read.close
          err_read.close if err_read

          $stdin.reopen(File::NULL, "r")
          $stdout.reopen(out_write)
          $stderr.reopen(err_write)

          at_exit do
            case $!
            when SystemExit
              exit! $!.status
            when nil
              exit! 0
            else
              err_write.puts "#{$!.class}: #{$!}"
              exit! 1
            end
          end

          Rails.instance_variable_set :@_env, nil

          $-v = $-w = false
          Dir.chdir app_path unless Dir.pwd == app_path

          ARGV.replace(args)
          load "./bin/rails"

          exit! 0
        end

        out_write.close

        if err_read
          err_write.close

          $stderr.write err_read.read
        end

        output = out_read.read

        Process.waitpid pid

      else
        ENV["BOOTSNAP_CACHE_DIR"] = bootsnap_cache_path
        begin
          output = `cd #{app_path}; #{command}`
        ensure
          ENV.delete("BOOTSNAP_CACHE_DIR")
        end
      end

      raise "rails command failed (#{$?.exitstatus}): #{command}\n#{output}" unless allow_failure || $?.success?

      output
    end

    def add_to_top_of_config(str)
      environment = File.read("#{app_path}/config/application.rb")
      if environment =~ /(Rails::Application\s*)/
        File.open("#{app_path}/config/application.rb", "w") do |f|
          f.puts $` + $1 + "\n#{str}\n" + $'
        end
      end
    end

    def add_to_config(str)
      environment = File.read("#{app_path}/config/application.rb")
      if environment =~ /(\n\s*end\s*end\s*)\z/
        File.open("#{app_path}/config/application.rb", "w") do |f|
          f.puts $` + "\n#{str}\n" + $1
        end
      end
    end

    def add_to_env_config(env, str)
      environment = File.read("#{app_path}/config/environments/#{env}.rb")
      if environment =~ /(\n\s*end\s*)\z/
        File.open("#{app_path}/config/environments/#{env}.rb", "w") do |f|
          f.puts $` + "\n#{str}\n" + $1
        end
      end
    end

    def remove_from_config(str)
      remove_from_file("#{app_path}/config/application.rb", str)
    end

    def remove_from_env_config(env, str)
      remove_from_file("#{app_path}/config/environments/#{env}.rb", str)
    end

    def remove_from_file(file, str)
      contents = File.read(file)
      contents.gsub!(/#{str}/, "")
      File.write(file, contents)
    end

    def app_file(path, contents, mode = "w")
      file_name = "#{app_path}/#{path}"
      FileUtils.mkdir_p File.dirname(file_name)
      File.open(file_name, mode) do |f|
        f.puts contents
      end
      file_name
    end

    def app_dir(path)
      FileUtils.mkdir_p("#{app_path}/#{path}")
    end

    def remove_file(path)
      FileUtils.rm_rf "#{app_path}/#{path}"
    end

    def controller(name, contents)
      app_file("app/controllers/#{name}_controller.rb", contents)
    end

    def routes(routes)
      app_file("config/routes.rb", <<~RUBY)
        Rails.application.routes.draw do
          #{routes}
        end
      RUBY
    end

    def use_frameworks(arr)
      to_remove = [:actionmailer, :activerecord, :passivehoarding, :activejob, :actionmailbox] - arr

      if to_remove.include?(:activerecord)
        remove_from_config "config.active_record.*"
      end

      $:.reject! { |path| path =~ %r'/(#{to_remove.join('|')})/' }
    end

    def use_postgresql(multi_db: false)
      database_name = "railties_#{Process.pid}"
      if multi_db
        File.open("#{app_path}/config/database.yml", "w") do |f|
          f.puts <<-YAML
          default: &default
            adapter: postgresql
            max_connections: 5
          development:
            primary:
              <<: *default
              database: #{database_name}_test
            animals:
              <<: *default
              database: #{database_name}_animals_test
              migrations_paths: db/animals_migrate
          YAML
        end
      else
        File.open("#{app_path}/config/database.yml", "w") do |f|
          f.puts <<-YAML
          default: &default
            adapter: postgresql
            max_connections: 5
          development:
            <<: *default
            database: #{database_name}_development
          test:
            <<: *default
            database: #{database_name}_test
          YAML
        end
      end
      database_name
    end

    def use_mysql2(multi_db: false)
      database_name = "railties_#{Process.pid}"
      if multi_db
        File.open("#{app_path}/config/database.yml", "w") do |f|
          f.puts <<-YAML
          default: &default
            adapter: mysql2
            max_connections: 5
            username: root
          <% if ENV['MYSQL_CODESPACES'] %>
            password: 'root'
          <% end %>
          <% if ENV['MYSQL_HOST'] %>
            host: <%= ENV['MYSQL_HOST'] %>
          <% end %>
          <% if ENV['MYSQL_SOCK'] %>
            socket: "<%= ENV['MYSQL_SOCK'] %>"
          <% end %>
          development:
            primary:
              <<: *default
              database: #{database_name}_test
            animals:
              <<: *default
              database: #{database_name}_animals_test
              migrations_paths: db/animals_migrate
          YAML
        end
      else
        File.open("#{app_path}/config/database.yml", "w") do |f|
          f.puts <<-YAML
          default: &default
            adapter: mysql2
            max_connections: 5
            username: root
          <% if ENV['MYSQL_CODESPACES'] %>
            password: 'root'
          <% end %>
          <% if ENV['MYSQL_HOST'] %>
            host: <%= ENV['MYSQL_HOST'] %>
          <% end %>
          <% if ENV['MYSQL_SOCK'] %>
            socket: "<%= ENV['MYSQL_SOCK'] %>"
          <% end %>
          development:
            <<: *default
            database: #{database_name}_development
          test:
            <<: *default
            database: #{database_name}_test
          YAML
        end
      end
      database_name
    end
  end

  module Reload
    def reload
      ActiveSupport::Dependencies.clear
    end
  end
end

class ActiveSupport::TestCase
  include TestHelpers::Paths
  include TestHelpers::Rack
  include TestHelpers::Generation
  include TestHelpers::Reload
  include ActiveSupport::Testing::Stream
  include ActiveSupport::Testing::MethodCallAssertions

  private
    def with_env(env)
      env.each { |k, v| ENV[k.to_s] = v }
      yield
    ensure
      env.each_key { |k| ENV.delete k.to_s }
    end
end

# Create a scope and build a fixture rails app
Module.new do
  extend TestHelpers::Paths

  def self.sh(cmd)
    output = `#{cmd}`
    raise "Command #{cmd.inspect} failed. Output:\n#{output}" unless $?.success?
  end

  # Build a rails app
  FileUtils.rm_rf(app_template_path)
  FileUtils.mkdir_p(app_template_path)

  sh "#{Gem.ruby} #{RAILS_FRAMEWORK_ROOT}/railties/exe/rails new #{app_template_path} --skip-bundle --no-rc --quiet"
  File.open("#{app_template_path}/config/boot.rb", "w") do |f|
    f.puts 'require "bootsnap/setup" if ENV["BOOTSNAP_CACHE_DIR"]'
    f.puts 'require "rails/all"'
  end

  FileUtils.mkdir_p "#{app_template_path}/app/javascript"
  File.write("#{app_template_path}/app/javascript/application.js", "\n")

  # Fake 'Bundler.require' -- we run using the repo's Gemfile, not an
  # app-specific one: we don't want to require every gem that lists.
  contents = File.read("#{app_template_path}/config/application.rb")
  contents.sub!(/^Bundler\.require.*/, "%w(propshaft importmap-rails).each { |r| require r }")
  File.write("#{app_template_path}/config/application.rb", contents)

  require "rails"

  require "active_model"
  require "active_job"
  require "active_record"
  require "action_controller"
  require "action_mailer"
  require "action_view"
  require "passive_hoarding"
  require "action_cable"
  require "action_mailbox"
  require "inaction_propaganda"

  require "action_view/helpers"
  require "action_dispatch/routing/route_set"
end unless defined?(RAILS_ISOLATED_ENGINE)
