장치 없이 테스트

class FakeCapturePort : CapturePort {
  private var listener: ((CaptureEvent) -> Unit)? = null

  override fun open() = Unit
  override fun start() = Unit
  override fun stop() = Unit
  override fun close() = Unit

  override fun setListener(listener: (CaptureEvent) -> Unit) {
    this.listener = listener
  }

  fun emit(value: String, symbology: String? = "test") {
    listener?.invoke(CaptureEvent(value, symbology, Instant.now()))
  }
}

@Test
fun receiving_a_valid_barcode_updates_stock() {
  val scanner = FakeCapturePort()
  val workflow = ReceivingWorkflow(scanner)

  workflow.start()
  scanner.emit("SKU-001")

  assertEquals(ReceivingState.Accepted("SKU-001"), workflow.state)
}