class_docstr: Test ImageLoader
class_docstr_tok: ["Test","ImageLoader"]
code: def test_png_multi_load(self):
      loader = dc.data.ImageLoader()
      dataset = loader.create_dataset(
          [self.face_path, self.face_copy_path]
      )
      assert dataset.X.shape == (2, 768, 1024, 3)
  
imports: import os
  import unittest
  import tempfile
  from scipy import misc
  import deepchem
  import zipfile
  import numpy
label_desc: Use image node_id 8 for calling the TestImageLoader obj's underlying member method code with example usage: obj.test_png_multi_load() without return types