discourse/bin/qunit

#!/usr/bin/env ruby
# frozen_string_literal: true
require "optparse"
require "shellwords"
require "json"
require "fileutils"
require "socket"
require "uri"
require "net/http"
require "securerandom"
require_relative "../lib/chrome_installed_checker"

class QunitRunner
  def initialize(args)
    @file_paths = []
    @verbose = ENV["ACTIONS_STEP_DEBUG"] == "true"
    @dry_run = false
    @rails_port = ENV["UNICORN_PORT"]&.to_i || 3000

    @standalone_mode = false

    @parallel = ENV["QUNIT_PARALLEL"]
    @seed = ENV["QUNIT_SEED"]
    @theme_name = ENV["THEME_NAME"]
    @theme_url = ENV["THEME_URL"]
    @theme_id = ENV["THEME_ID"]
    @qunit_path = nil
    @rails_env = ENV["QUNIT_RAILS_ENV"] || "test"
    @plugin_targets = []

    @headless = true

    parse_options(args)
  end

  def run
    if @standalone_mode
      with_standalone_rails { run_tests }
    else
      run_tests
    end
  end

  private

  def parse_options(args)
    parser =
      OptionParser.new do |opts|
        opts.banner = <<~BANNER
          Usage: bin/qunit [options] [files|directories]

          Runs the Discourse QUnit suite. By default, tests will be run against the running Rails server and existing JS assets.
          Add --standalone to spin up an isolated Rails server and run a standalone asset build.
        BANNER

        opts.separator ""
        opts.separator "Options:"

        opts.on("-f", "--filter FILTER", "Run tests matching this filter") do |filter|
          @filter = filter
        end

        opts.on("--dry-run", "Show what would run without executing") { @dry_run = true }

        opts.on(
          "--rails-port PORT",
          Integer,
          "Rails server port (default: 3000) (env: UNICORN_PORT)",
        ) { |port| @rails_port = port }

        opts.on("--standalone", "Use standalone mode (spins up own test server)") do
          @standalone_mode = true
        end

        opts.on(
          "--parallel N",
          Integer,
          "Run tests in parallel (N workers) (env: QUNIT_PARALLEL)",
        ) { |n| @parallel = n.to_s }

        opts.on("--seed SEED", "Random seed for test order (env: QUNIT_SEED)") do |seed|
          @seed = seed
        end

        opts.on(
          "--target TARGET",
          "Target: 'core', 'plugins' (all plugins), or comma separated plugin names",
        ) { |target| @target = target }

        opts.on("--module MODULE", "Run specific module") { |mod| @module = mod }

        opts.on("--theme-name NAME", "Theme name for theme tests (env: THEME_NAME)") do |name|
          @theme_name = name
        end
        opts.on("--theme-url URL", "Theme URL for theme tests (env: THEME_URL)") do
          @theme_url = url
        end
        opts.on("--theme-id ID", "Theme ID for theme tests (env: THEME_ID)") { |id| @theme_id = id }
        opts.on("--qunit-path PATH", "QUnit path (e.g., /theme-qunit)") do |path|
          @qunit_path = path
        end

        opts.on("--rails-env ENV", "Rails environment (default: test) (env: RAILS_ENV)") do |env|
          @rails_env = env
        end

        opts.on("--report-requests", "Report HTTP requests during tests") do
          @report_requests = true
        end

        opts.on("--[no-]headless", "Run tests in headless mode (env: QUNIT_HEADLESS)") do |h|
          @headless = h
        end

        opts.on("-v", "--verbose", "Verbose output") { @verbose = true }

        opts.on("-h", "--help", "Show this help message") do
          puts opts
          exit 0
        end

        opts.separator <<~NOTES
          \nExamples:
            bin/qunit frontend/discourse/tests/unit/models/user-test.js
            bin/qunit frontend/discourse/tests/unit/  # Run all tests in directory
            bin/qunit --standalone --target plugins  # Run all plugin tests
            bin/qunit --standalone --target chat     # Run single plugin tests
            bin/qunit --standalone plugins/chat/test/javascripts/unit/lib/chat-audio-test.js
            bin/qunit --standalone --filter "Acceptance: Emoji"
        NOTES
      end

    begin
      parser.parse!(args)
    rescue OptionParser::InvalidOption => e
      warn "Error: #{e.message}"
      puts ""
      puts parser
      exit 1
    end

    ensure_supported_target!

    @file_paths = args

    detect_plugin_targets!
    expand_directory_paths!
  end

  def detect_plugin_targets!
    if resolved_target.include?(",")
      @plugin_targets = resolved_target.split(",").map(&:strip)
      puts "Running tests for #{@plugin_targets.join(", ")}" if @verbose
    elsif resolved_target == "plugins"
      @plugin_targets = find_all_plugins_with_tests
      puts "Discovered #{@plugin_targets.length} plugins with tests" if @verbose
    end
  end

  def find_all_plugins_with_tests
    plugins_dir = File.expand_path("../plugins", __dir__)
    return [] unless Dir.exist?(plugins_dir)

    Dir
      .children(plugins_dir)
      .sort
      .select do |plugin_dir_name|
        plugin_path = File.join(plugins_dir, plugin_dir_name)
        next false unless File.directory?(plugin_path)

        # Check if plugin has tests
        test_dirs = %w[test/javascripts test].map { |subdir| File.join(plugin_path, subdir) }
        test_dirs.any? do |test_dir|
          Dir.exist?(test_dir) && Dir.glob(File.join(test_dir, "**", "*-test.{js,gjs}")).any?
        end
      end
      .map { |plugin_dir_name| resolve_plugin_namespace(plugin_dir_name) }
  end

  def expand_directory_paths!
    expanded = []

    @file_paths.each do |path|
      if File.directory?(path)
        test_files = Dir.glob(File.join(path, "**", "*-test.{js,gjs}"))
        if test_files.empty?
          abort "Error: No test files found in directory: #{path}"
        else
          expanded.concat(test_files)
        end
      elsif File.file?(path)
        expanded << path
      else
        abort "Error: Path not found: #{path}"
      end
    end

    @file_paths = expanded.uniq
  end

  def run_tests
    ensure_file_paths_exist!

    if @file_paths && @verbose
      puts "Files to test: #{@file_paths.length}"
      puts "  #{@file_paths.join("\n  ")}"
    end

    target = resolved_target
    puts "Target: #{target}" if @verbose

    file_path_filter = build_file_path_filter(@file_paths)

    run_ember_exam(file_path_filter: file_path_filter, filter: @filter)
  end

  def run_ember_exam(filter: nil, file_path_filter: nil)
    check_dev_environment!

    puts "\nRunning tests against Rails on localhost:#{@rails_port}"
    puts "  Using existing build in frontend/discourse/dist" unless @standalone_mode

    if @plugin_targets.any?
      puts "  Plugins: #{@plugin_targets.join(", ")}"
    elsif file_path_filter
      puts "  Filtered by file path" if file_path_filter
    end
    puts "  Filter: #{filter}" if filter
    puts "  Load plugins: #{should_load_plugins?}"
    puts ""

    dir = frontend_dir

    unless Dir.exist?(dir)
      puts "Error: frontend/discourse directory not found at #{dir}"
      exit 1
    end

    env = {}
    env["LOAD_PLUGINS"] = should_load_plugins? ? "1" : "0"
    env["REPORT_REQUESTS"] = "1" if @report_requests
    env["UNICORN_PORT"] = @rails_port.to_s
    env["TESTEM_DEFAULT_BROWSER"] = ENV["TESTEM_DEFAULT_BROWSER"] || detect_browser
    env["PLUGIN_TARGETS"] = @plugin_targets.join(",") if @plugin_targets.any?
    env["QUNIT_HEADLESS"] = "0" if !@headless

    parallel = !@plugin_targets.any? && present_string(@parallel)
    reuse_build = ENV["QUNIT_REUSE_BUILD"] == "1" || !@standalone_mode

    query = build_query

    args = []

    run_ember_build unless reuse_build
    if @qunit_path
      env["THEME_TEST_PAGES"] = build_theme_test_pages(query)
      args += %w[pnpm testem ci -f testem.js]
      args += ["--parallel", parallel.to_s] if parallel
    else
      args = %w[pnpm ember exam]
      args += ["--query", query] if query && !query.empty?
      args += ["--filter", filter] if filter
      args += ["--file-path", file_path_filter] if file_path_filter
      args += ["--load-balance", "--parallel", parallel.to_s] if parallel
      args += ["--random", resolved_seed]
      args += %w[--path dist]
      args << "--write-execution-file" if ENV["QUNIT_WRITE_EXECUTION_FILE"]
    end

    puts <<~MESSAGE if @verbose || @dry_run
      Executing: #{JSON.pretty_generate(args)}
      with env: #{JSON.pretty_generate(env)}
    MESSAGE

    if @dry_run
      puts "[dry-run] tests not executed"
      exit 0
    end

    system(env, *args, chdir: dir)
    exit $?.exitstatus
  end

  def convert_to_ember_relative_path(file_path)
    path = File.expand_path(file_path)

    if path.match?(%r{(?:^|/)plugins/})
      relative = path.split("/plugins/").last
      plugin_dir, remainder = relative.split("/", 2)
      plugin_dir ||= relative
      namespaced_plugin = resolve_plugin_namespace(plugin_dir)
      remainder_path = normalize_plugin_test_path(remainder)

      parts = ["discourse", "plugins", namespaced_plugin]
      parts << remainder_path unless remainder_path.empty?
      return parts.join("/")
    end

    if path.include?("/frontend/discourse/tests/")
      return path.split("/frontend/discourse/").last
    elsif path.include?("/tests/")
      return path.split("/tests/").last.prepend("tests/")
    end

    parts = path.split("/")
    if idx = parts.index("tests")
      return parts[idx..-1].join("/")
    end

    file_path
  end

  def ensure_file_paths_exist!
    @file_paths.each do |file_path|
      next if File.exist?(file_path)

      puts "Error: File not found: #{file_path}"
      exit 1
    end
  end

  def check_dev_environment!
    if @dry_run
      puts "[dry-run] skipping dev environment check"
      return
    end

    rails_ok = check_server(@rails_port, "Rails")

    unless rails_ok
      puts "\n? Dev environment not ready!\n"
      puts "Expected Rails to be running on #{@rails_port}, but it is not responding."
      puts
      puts "Start with: bin/rails server, or use --standalone mode to spin up automatically"
      puts ""
      exit 1
    end
  end

  def check_server(port, name)
    uri = URI("http://localhost:#{port}")
    http = Net::HTTP.new(uri.host, uri.port)
    http.open_timeout = 5
    http.read_timeout = 5

    begin
      response = http.get("/")
      if response.is_a?(Net::HTTPSuccess) || response.is_a?(Net::HTTPRedirection)
        puts "? #{name} server responding on :#{port}" if @verbose
        true
      else
        puts "? #{name} server on :#{port} returned #{response.code}"
        false
      end
    rescue Errno::ECONNREFUSED
      puts "? #{name} server not responding on :#{port} (connection refused)"
      false
    rescue => e
      puts "? #{name} server on :#{port}: #{e.message}" if @verbose
      false
    end
  end

  def with_standalone_rails(&block)
    puts "Running in standalone mode (spinning up test server)..." if @verbose

    ensure_pnpm_installed!
    install_node_dependencies!

    @rails_port = next_available_port(60_098)
    server_env = build_server_environment(@rails_port)
    server_pid = nil

    begin
      if @dry_run
        puts "[dry-run] skipping server startup"
      else
        server_pid =
          Process.spawn(server_env, File.join(rails_root, "bin", "pitchfork"), pgroup: true)
      end
      wait_for_rails_server(@rails_port)
      yield
    ensure
      stop_server(server_pid, server_env["UNICORN_PID_PATH"]) if server_pid
    end
  end

  def ensure_pnpm_installed!
    return if system("command -v pnpm >/dev/null")
    abort "pnpm is not installed. See https://pnpm.io/installation"
  end

  def install_node_dependencies!
    if @dry_run
      puts "[dry-run] skipping pnpm install"
      return
    end

    node_modules_outdated =
      begin
        File.read("node_modules/.pnpm/lock.yaml") != File.read("pnpm-lock.yaml")
      rescue Errno::ENOENT
        true
      end

    system("pnpm", "install", exception: true) if node_modules_outdated
  end

  def detect_browser
    ChromeInstalledChecker.run
  rescue ChromeInstalledChecker::ChromeError => err
    abort err.message
  end

  def next_available_port(start_port)
    port = (ENV["TEST_SERVER_PORT"] || start_port).to_i
    port += 1 while !port_available?(port)
    port
  end

  def port_available?(port)
    server = TCPServer.open(port)
    server.close
    true
  rescue Errno::EADDRINUSE
    false
  end

  def build_server_environment(server_port)
    pid_path = File.join(rails_root, "tmp/pids", "test_server_#{server_port}.pid")
    env = {
      "RAILS_ENV" => @rails_env || "test",
      "SKIP_ENFORCE_HOSTNAME" => "1",
      "UNICORN_PID_PATH" => pid_path,
      "UNICORN_PORT" => server_port.to_s,
      "UNICORN_SIDEKIQS" => "0",
      "DISCOURSE_SKIP_CSS_WATCHER" => "1",
      "UNICORN_LISTENER" => "127.0.0.1:#{server_port}",
      "LOGSTASH_UNICORN_URI" => nil,
      "UNICORN_WORKERS" => "1",
      "UNICORN_TIMEOUT" => "90",
    }

    env["LOAD_PLUGINS"] = "1" if should_load_plugins?

    env
  end

  def wait_for_rails_server(port)
    if @dry_run
      puts "[dry-run] skipping Rails server warm-up"
      return
    end
    uri = URI("http://localhost:#{port}/srv/status")
    puts "Warming up Rails server"

    deadline = Time.now + 60
    begin
      Net::HTTP.get(uri)
    rescue Errno::ECONNREFUSED,
           Errno::EADDRNOTAVAIL,
           Net::ReadTimeout,
           Net::HTTPBadResponse,
           EOFError
      if Time.now <= deadline
        sleep 1
        retry
      end

      puts "Timed out. Cannot connect to forked server!"
      exit 1
    end

    puts "Rails server is warmed up"
  end

  def run_ember_build
    if @dry_run
      puts "[dry-run] skipping ember build"
      return
    end

    system(
      { "LOAD_PLUGINS" => should_load_plugins? ? "1" : "0" },
      "script/assemble_ember_build.rb",
      chdir: rails_root,
      exception: true,
    )
  end

  def build_theme_test_pages(query)
    pages =
      if ENV["THEME_IDS"] && !ENV["THEME_IDS"].empty?
        ENV["THEME_IDS"]
          .split("|")
          .map { |theme_id| "#{@qunit_path}?#{query}&testem=1&id=#{theme_id}" }
      else
        ["#{@qunit_path}?#{query}&testem=1"]
      end

    pages.shuffle.join(",")
  end

  def build_file_path_filter(paths)
    return nil if paths.empty?

    relative_paths = paths.map { |path| convert_to_ember_relative_path(path) }
    relative_paths.join(",")
  end

  def build_query
    params = {}
    if @qunit_path
      # Only include seed manually if we're running without ember exam
      params["seed"] = resolved_seed
    end
    params["module"] = @module if @module
    params["theme_name"] = @theme_name if @theme_name
    params["theme_url"] = @theme_url if @theme_url
    params["theme_id"] = @theme_id if @theme_id
    params["target"] = resolved_target if resolved_target && !@plugin_targets.any?
    params["report_requests"] = "1" if @report_requests

    encode_query_string(params)
  end

  def stop_server(pid, pid_path)
    if @dry_run
      puts "[dry-run] skipping server shutdown"
      return
    end
    Process.kill("-KILL", pid)
  rescue Errno::ESRCH
  ensure
    FileUtils.rm_f(pid_path) if pid_path
  end

  def rails_root
    @rails_root ||= File.expand_path("..", __dir__)
  end

  def frontend_dir
    @frontend_dir ||= File.expand_path("../frontend/discourse", __dir__)
  end

  def resolved_target
    @resolved_target ||=
      begin
        implicit_target = (target_from_paths(@file_paths) if @file_paths.any?)

        if @target && implicit_target && @target != implicit_target
          puts "Files are for '#{implicit_target}', but target was configured as '#{@target}'"
          exit 1
        end

        implicit_target || @target || "core"
      end
  end

  def resolved_seed
    @resolved_seed ||= present_string(@seed) || SecureRandom.alphanumeric(8)
  end

  def should_load_plugins?
    resolved_target != "core"
  end

  def target_from_paths(paths)
    targets = paths.map { |path| target_from_path(path) }.uniq
    if targets.length > 1
      puts "Error: Cannot mix multiple plugin/core targets when running specific files"
      exit 1
    end
    targets.first
  end

  def target_from_path(path)
    match = path.match(%r{(?:^|/)plugins/([^/]+)/})
    return "core" unless match

    resolve_plugin_namespace(match[1])
  end

  def plugin_path?(path)
    path.match?(%r{(?:^|/)plugins/})
  end

  def encode_query_string(params = {})
    cleaned = params.compact
    return nil if cleaned.empty?

    URI.encode_www_form(cleaned)
  end

  def present_string(value)
    return nil if value.nil?

    str = value.to_s
    str.empty? ? nil : str
  end

  def resolve_plugin_namespace(directory_name)
    @plugin_namespace_cache ||= {}
    return @plugin_namespace_cache[directory_name] if @plugin_namespace_cache.key?(directory_name)

    plugin_rb = File.expand_path("../plugins/#{directory_name}/plugin.rb", __dir__)

    if File.exist?(plugin_rb)
      File.foreach(plugin_rb) do |line|
        next unless line.start_with?("#")
        attribute, value = line[1..].split(":", 2)
        next unless attribute&.strip == "name"

        plugin_name = value&.strip
        if plugin_name && !plugin_name.empty?
          @plugin_namespace_cache[directory_name] = plugin_name
          return plugin_name
        end
      end
    end

    @plugin_namespace_cache[directory_name] = directory_name
  end

  def normalize_plugin_test_path(path)
    path.sub(%r{\Atests?/javascripts/}, "")
  end

  def plugin_names_from_filter(filter)
    return [] unless filter

    filter.scan(%r{plugins/([^/]+)/}).flatten.uniq.map { |dir| resolve_plugin_namespace(dir) }
  end

  def ensure_supported_target!
    value = present_string(@target)
    return unless value

    normalized = value.downcase
    if normalized == "all"
      abort "Error: Target 'all' is no longer supported. Use 'core' or 'plugins'."
    end
  end
end

QunitRunner.new(ARGV).run