   alias Baumeister.Observer.NoopPlugin
   alias Baumeister.Test.TestListener
   alias Baumeister.EventCenter
+  alias Baumeister.EventLogger
 
   alias Baumeister.Test.Utils
 

    NoopPlugin.make_coordinate(tmp_dir)
  end

  @tag timeout: 1_000
  test "Start a worker", _env do
    {:ok, worker} = Worker.start_link()
    Logger.debug "Worker is started"
    assert is_pid(worker)
    assert Process.alive?(worker)
    all_workers = Coordinator.all_workers()
    Logger.debug "all workers: #{inspect all_workers}"
    assert Enum.any?(all_workers, fn(w) -> w.pid == worker end)
    Process.exit(worker, :normal)
    remaining_workers = Coordinator.all_workers()
    assert not Enum.member?(remaining_workers, worker)
  end

  @tag timeout: 120_000
  property "run many worker executions", [:verbose] do
    {:ok, worker} = Worker.start_link()
    wait_for_worker()
    Logger.debug "Worker is started"
    # use size to achieve smaller lists
    forall delays <- vector(10, float(0.0,0.1))  do
