text: import pytest
  import mock
  
  
  def test_pibrella_output_a_on(GPIO, atexit):
      import pibrella
  
      pibrella.output.e.on()
      pibrella.output.e.off()
  
      assert GPIO.output.has_calls((
          mock.call(pibrella.PB_PIN_OUTPUT_A, True),
          mock.call(pibrella.PB_PIN_OUTPUT_A, False)
      ))