'Start testing with a progress bar.'

def start_test(self):

    self.ds.reset_state()
    with get_tqdm(total=self.test_size, leave=True, smoothing=0.2) as pbar:
        for (idx, dp) in enumerate(self.ds.get_data()):
            pbar.update()
            if (idx == (self.test_size - 1)):
                break
