minitest sample for medium article

minitest_sample.rb

def test_calls_remote_service                                                                                                                     
  remote_services = Minitest::Mock.new
  voice_service = VoiceService.new(remote_services)
  remote_services.expect :request_recognize, { result: 'ochenta y ocho' }.to_json, ['88.wav']
 
  result = voice_service.recognize('88.wav')

  assert_equal 'ochenta y ocho', result
  remote_services.verify
end