code: def test_distributed_image_set_from_rdds(self):
      image_rdd = self.sc.parallelize(np.zeros((4, 32, 32, 3)))
      label_rdd = self.sc.parallelize(
          np.random.randint(0, 4, size=(4, 1))
      )
      image_set = ImageSet.from_rdds(image_rdd, label_rdd)
  
      for image in image_set.get_image().collect():
          assert image.sum() == 0.0
  
      for label in image_set.get_label().collect():
          assert label >= 0.0 and label < 4.0
  
imports: import pytest
  import cv2
  from bigdl.dllib.nncontext import *
  from bigdl.dllib.feature.image import *
label_desc: Use image node_id 19 for calling the Test_Image_Set obj's underlying member method code with example usage: obj.test_distributed_image_set_from_rdds() without return types