code: def test_translatex(self):
      # test assertion for invalid value of min_mag
      with self.assertRaises(AssertionError):
          transform = TranslateX(prob=0.5, level=2, min_mag=-1.0)
      # test assertion for invalid value of max_mag
      with self.assertRaises(AssertionError):
          transform = TranslateX(prob=0.5, level=2, max_mag=1.1)
  
      # test case when level=0 (without translate aug)
      transform = TranslateX(
          prob=1.0,
          level=0,
          img_border_value=self.img_border_value,
          seg_ignore_label=self.seg_ignore_label,
      )
      results_wo_translatex = transform(
          copy.deepcopy(self.results_mask)
      )
      check_result_same(
          self.results_mask, results_wo_translatex, self.check_keys
      )
  
      # test translate horizontally, magnitude=-1
      transform = TranslateX(
          prob=1.0,
          level=10,
          max_mag=0.3,
          reversal_prob=0.0,
          img_border_value=self.img_border_value,
          seg_ignore_label=self.seg_ignore_label,
      )
      results_translated = transform(copy.deepcopy(self.results_mask))
      img_gt = np.array(
          [[2, 3, 4, 0], [6, 7, 8, 0], [10, 11, 12, 0]]
      ).astype(np.uint8)
      img_gt = np.stack([img_gt, img_gt, img_gt], axis=-1)
      img_gt[:, 3, :] = np.array(self.img_border_value)
      results_gt = copy.deepcopy(self.results_mask)
      results_gt["img"] = img_gt
      results_gt["gt_bboxes"] = np.array(
          [[0, 0, 1, 2]], dtype=np.float32
      )
      gt_masks = np.array(
          [[1, 0, 0, 0], [1, 1, 0, 0], [1, 0, 0, 0]], dtype=np.uint8
      )[None, :, :]
      results_gt["gt_masks"] = BitmapMasks(gt_masks, 3, 4)
      results_gt["gt_ignore_flags"] = np.array(
          np.array([1], dtype=bool)
      )
      results_gt["gt_seg_map"] = np.array(
          [[13, 255, 255, 255], [13, 13, 255, 255], [13, 255, 255, 255]]
      ).astype(self.results_mask["gt_seg_map"].dtype)
      check_result_same(results_gt, results_translated, self.check_keys)
  
      # test PolygonMasks with translate horizontally.
      results_translated = transform(copy.deepcopy(self.results_poly))
      gt_masks = [[np.array([0, 2, 0, 0, 1, 1], dtype=np.float32)]]
      results_gt["gt_masks"] = PolygonMasks(gt_masks, 3, 4)
      check_result_same(results_gt, results_translated, self.check_keys)
  
imports: import copy
  import unittest
  import numpy
  from mmdet.datasets.transforms import GeomTransform, Rotate, ShearX, ShearY, TranslateX, TranslateY
  from mmdet.structures.bbox import HorizontalBoxes
  from mmdet.structures.mask import BitmapMasks, PolygonMasks
  from .utils import check_result_same, construct_toy_data
label_desc: Use image node_id 2 for calling the TestTranslateX obj's underlying member method code with example usage: obj.test_translatex() without return types