code: def test_load_uvs(self):
      io = IO()
      mesh = io.load_mesh(DATA_DIR / "uvs.ply")
      self.assertEqual(
          mesh.textures.verts_uvs_padded().shape, (1, 8, 2)
      )
      self.assertClose(
          mesh.textures.verts_uvs_padded()[0],
          torch.tensor([[0, 0]] + [[0.2, 0.3]] * 6 + [[0.4, 0.5]]),
      )
      self.assertEqual(
          mesh.textures.faces_uvs_padded().shape,
          mesh.faces_padded().shape,
      )
      self.assertEqual(
          mesh.textures.maps_padded().shape, (1, 512, 512, 3)
      )
  
imports: import itertools
  import struct
  import unittest
  from io import BytesIO, StringIO
  from tempfile import NamedTemporaryFile, TemporaryFile
  import numpy
  import pytorch3d.io.ply_io
  import torch
  from iopath.common.file_io import PathManager
  from pytorch3d.io import IO
  from pytorch3d.io.ply_io import load_ply, save_ply
  from pytorch3d.renderer.mesh import TexturesVertex
  from pytorch3d.structures import Meshes, Pointclouds
  from pytorch3d.utils import torus
  from .common_testing import get_tests_dir, TestCaseMixin
label_desc: Use image node_id 21 for calling the TestMeshPlyIO obj's underlying member method code with example usage: obj.test_load_uvs() without return types