Class: RailsResponseDumper::Runner

Inherits:
Object
  • Object
show all
Defined in:
lib/rails_response_dumper/runner.rb

Instance Attribute Summary collapse

Instance Method Summary collapse

Constructor Details

#initialize(options) ⇒ Runner

Returns a new instance of Runner.



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# File 'lib/rails_response_dumper/runner.rb', line 10

def initialize(options)
  @options = options
end

Instance Attribute Details

#options ⇒ Object (readonly)

Returns the value of attribute options.



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# File 'lib/rails_response_dumper/runner.rb', line 8

def options
  @options
end

Instance Method Details

#run_dumps ⇒ Object 



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# File 'lib/rails_response_dumper/runner.rb', line 14

def run_dumps
  dumps_dir = options['dumps-dir']

  if options[:filenames].present?
    globs = options[:filenames]
  else
    globs = ['dumpers/**/*_dumper.rb']
    FileUtils.rm_rf dumps_dir
  end

  FileUtils.mkdir_p dumps_dir

  globs.each do |glob|
    Dir[Rails.root.join(glob)].each { |f| require f }
  end

  errors = []

  dumper_blocks = RailsResponseDumper::Defined.dumpers.flat_map do |defined|
    if options[:filenames].present?
      # clear previous dumps for that file in case removed from updated dump file
      FileUtils.rm_rf "#{dumps_dir}/#{defined.name.underscore}/"
    end

    defined.blocks.map do |dump_block|
      [defined, dump_block]
    end
  end

  if options[:order].present?
    seed = if options[:order] == 'random'
             Random.new_seed
           else
             Integer(options[:order])
           end

    puts "Randomized with seed #{seed}"

    random = Random.new(seed)
    dumper_blocks.shuffle!(random: random)
  end

  profile = {}

  catch :fail_fast do
    dumper_blocks.each do |(defined, dump_block)|
      name = "#{defined.name}.#{dump_block.name}"

      print "#{name} " if options[:verbose]

      defined.reset_models!
      dumper = defined.klass.new
      dumper.mock_setup
      begin
        rollback_after do
          t0 = Time.now
          dumper.instance_eval(&defined.before_block) if defined.before_block
          begin
            dumper.instance_eval(&dump_block.block)
          ensure
            dumper.instance_eval(&defined.after_block) if defined.after_block
          end
          profile[name] = Time.now - t0
        end
      ensure
        dumper.mock_teardown
      end

      unless dumper.responses.count == dump_block.expected_status_codes.count
        raise <<~ERROR.squish
          #{dumper.responses.count} responses
          (expected #{dump_block.expected_status_codes.count})
        ERROR
      end

      klass_path = defined.name.underscore
      dumper_dir = "#{dumps_dir}/#{klass_path}/#{dump_block.name}"
      FileUtils.mkdir_p dumper_dir

      dumper.responses.each_with_index do |(response, timestamp), index|
        unless response.status == dump_block.expected_status_codes[index]
          raise <<~ERROR.squish
            unexpected status code #{response.status} #{response.status_message}
            (expected #{dump_block.expected_status_codes[index]})
          ERROR
        end

        request = response.request

        dump = {
          request: {
            url: request.url,
            env: request.headers.to_h
          },
          response: {
            status: response.status,
            statusText: response.status_message,
            headers: response.headers
          }
        }

        # request.headers includes nonstandard internal data, some of which also lacks default deterministic
        # serialization. Here we only want CGI standard and HTTP variables.
        dump[:request][:env].filter! do |key|
          key.in?(ActionDispatch::Http::Headers::CGI_VARIABLES) || key.start_with?('HTTP_')
        end

        dump[:response].delete(:headers) if options[:exclude_response_headers]

        dump[:timestamp] = timestamp.iso8601 unless options[:exclude_timestamp]

        File.write("#{dumper_dir}/#{index}.json", JSON.pretty_generate(dump))
        File.write("#{dumper_dir}/#{index}.request_body", request.body.string, mode: 'wb')
        File.write("#{dumper_dir}/#{index}.response_body", response.body, mode: 'wb')
      end

      RailsResponseDumper.print_color('.', :green)
      print("\n") if options[:verbose]
    rescue StandardError => e
      errors << {
        dumper_location: dump_block.block.source_location.join(':'),
        name: name,
        exception: e
      }

      RailsResponseDumper.print_color('F', :red)
      print("\n") if options[:verbose]

      throw :fail_fast if options[:fail_fast]
    end
  end

  puts

  unless errors.blank?
    puts

    errors.each do |error|
      RailsResponseDumper.print_color(
        "#{error[:dumper_location]} #{error[:name]} received #{error[:exception]}\n",
        :red
      )
      error[:exception].full_message(highlight: RailsResponseDumper::COLORIZE).lines do |line|
        RailsResponseDumper.print_color(line, :cyan)
      end
      puts
    end
  end

  if options.include?(:profile)
    puts

    # Sort in descending order to obtain the 10 slowest dumps.
    timings = profile.to_a.sort_by { |(_key, value)| -value }
    timings.first(10).each do |(dump, time)|
      formatted_time = format('%.2f', time)
      puts "#{dump} #{formatted_time} s"
    end

    puts
  end

  exit(errors.blank?)
end