Class: Flaky::Commands::Stress

Inherits:
Object
  • Object
show all
Defined in:
lib/flaky/commands/stress.rb

Instance Method Summary collapse

Constructor Details

#initialize(spec_location:, iterations: 20, seed: nil, ci_simulate: false, timeout: 600) ⇒ Stress

Returns a new instance of Stress.



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# File 'lib/flaky/commands/stress.rb', line 8

def initialize(spec_location:, iterations: 20, seed: nil, ci_simulate: false, timeout: 600)
  @spec_location = spec_location
  @iterations = iterations
  @seed = seed
  @ci_simulate = ci_simulate
  @timeout = timeout
  @repo = Repository.new
end

Instance Method Details

#execute ⇒ Object 



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# File 'lib/flaky/commands/stress.rb', line 17

def execute
  env = {}
  env["FLAKY_CI_SIMULATE"] = "1" if @ci_simulate

  seeds = resolve_seeds
  passes = 0
  failures = 0
  failed_seeds = []
  start_time = Time.now

  puts "Stress testing: #{@spec_location}"
  puts "  Iterations: #{@iterations}, Seeds: #{seed_description(seeds)}, CI simulation: #{@ci_simulate}"
  puts ""

  @iterations.times do |i|
    elapsed = Time.now - start_time
    if elapsed > @timeout
      puts "\n\nTimeout reached (#{@timeout}s) after #{i} iterations."
      break
    end

    run_seed = seeds ? seeds[i % seeds.length] : rand(100_000)
    cmd = "bundle exec rspec #{@spec_location} --seed #{run_seed} --format progress 2>&1"

    output = nil
    success = nil
    IO.popen(env, cmd) do |io|
      output = io.read
      io.close
      success = $?.success?
    end

    if success
      passes += 1
      print "\e[32m.\e[0m"
    else
      failures += 1
      failed_seeds << run_seed
      print "\e[31mF\e[0m"
    end
  end

  total = passes + failures
  rate = total > 0 ? (failures.to_f / total * 100).round(1) : 0

  puts "\n\n#{total} runs: #{passes} passed, #{failures} failed"
  puts "Failure rate: #{rate}%"

  if failed_seeds.any?
    puts "Failed seeds: #{failed_seeds.join(', ')}"
    puts "\nTo reproduce a specific failure:"
    puts "  FLAKY_CI_SIMULATE=#{@ci_simulate ? '1' : '0'} bundle exec rspec #{@spec_location} --seed #{failed_seeds.first}"
  end

  @repo.insert_stress_run(
    spec_location: @spec_location, seed: @seed.is_a?(Integer) ? @seed : nil,
    iterations: @iterations, passes: passes, failures: failures,
    ci_simulation: @ci_simulate ? 1 : 0
  )

  exit(failures > 0 ? 1 : 0)
ensure
  @repo.close
end