code: def test_zero_padding_3d_with_dynamic_spatial_dim(self):
      if backend.config.image_data_format() == "channels_last":
          input_layer = layers.Input(batch_shape=(1, 2, None, 4, 5))
      else:
          input_layer = layers.Input(batch_shape=(1, 5, 2, None, 4))
      padded = layers.ZeroPadding3D(((1, 2), (3, 4), (5, 6)))(
          input_layer
      )
      if backend.config.image_data_format() == "channels_last":
          self.assertEqual(padded.shape, (1, 5, None, 15, 5))
      else:
          self.assertEqual(padded.shape, (1, 5, 5, None, 15))
  
file_path: keras/keras/layers/reshaping/zero_padding3d_test.py
imports: import numpy
  from absl.testing import parameterized
  from keras import backend
  from keras import layers
  from keras import testing
label_desc: Use image node_id 3 for calling the ZeroPadding3DTest obj's underlying member method code with example usage: obj.test_zero_padding_3d_with_dynamic_spatial_dim() without return types