Test fails when upgrading from 2.17.8 to 2.17.9

[shamanime]

Environment

• Oban Version: 2.17.9
• PostgreSQL Version: 13
• Elixir & Erlang/OTP Versions (elixir --version): 1.16 OTP 26

Current Behavior

Given the following GenServer:

defmodule SyncSchedulerWorker do
  use GenServer

  def start_link(_) do
    GenServer.start_link(__MODULE__, [], name: __MODULE__)
  end

  @impl true
  def init(state) do
    schedule_work()
    {:ok, state}
  end

  @impl true
  def handle_info(:work, _state) do
    schedule_work()
    {:noreply, start_background_jobs()}
  end

  defp schedule_work, do: Process.send_after(self(), :work, :timer.hours(1))

  defp start_background_jobs() do
    for org <- Orgs.list_syncable_organizations() do
      {:ok, _job} = Oban.insert(SyncWorker.new(%{organization_id: org.id}))
    end
  end
end

And the following test:

defmodule SyncSchedulerWorkerTest do
  use App.DataCase

  test "without syncable organizations" do
    # PASSES
    pid = Process.whereis(SyncSchedulerWorker)
    send(pid, :work)
    refute_enqueued(worker: SyncWorker)
  end

  test "with syncable organizations" do
    # FAILS
    %{id: id} = Fixtures.organization()

    pid = Process.whereis(SyncSchedulerWorker)
    send(pid, :work)
    assert_enqueued([worker: SyncWorker, args: %{organization_id: id}], 5_000)
  end
end

The second test fails with the error:

     11:48:36.727 [error] GenServer SyncSchedulerWorker terminating
     ** (ArgumentError) errors were found at the given arguments:

       * 1st argument: not a pid

         (erts 14.2.1) :erlang.process_info(Pulse.Supervisor, :dictionary)
         (elixir 1.16.0) lib/process.ex:860: Process.info/2
         (oban 2.17.9) lib/oban/config.ex:167: Oban.Config.inline_testing?/2
         (elixir 1.16.0) lib/enum.ex:4202: Enum.predicate_list/3
         (oban 2.17.9) lib/oban/config.ex:159: Oban.Config.get_engine/1
         (oban 2.17.9) lib/oban/engine.ex:317: anonymous fn/3 in Oban.Engine.with_span/4
         (telemetry 1.2.1) /xxx/deps/telemetry/src/telemetry.erl:321: :telemetry.span/3
         (pulse 1.0.0) lib/app/sync_scheduler_worker.ex:25: anonymous fn/1 in SyncSchedulerWorker.start_background_jobs/0
         (elixir 1.16.0) lib/enum.ex:1700: Enum."-map/2-lists^map/1-1-"/2
         (pulse 1.0.0) lib/app/sync_scheduler_worker.ex:18: SyncSchedulerWorker.handle_info/2
         (stdlib 5.2) gen_server.erl:1095: :gen_server.try_handle_info/3
         (stdlib 5.2) gen_server.erl:1183: :gen_server.handle_msg/6
         (stdlib 5.2) proc_lib.erl:241: :proc_lib.init_p_do_apply/3
     Last message: :work

Oban is configured as follows in test.exs:

config :app, Oban, testing: :manual

Expected Behavior

The test passes on versions prior to 2.17.9. It should pass with 2.17.9 as well.

Other

Could be related to changes for https://github.com/sorentwo/oban/issues/1067?

[sorentwo]

This is fixed on main and will be released in a patch within the next day or so.