code: def test_zero_padding_2d_with_dynamic_spatial_dim(self):
      if backend.config.image_data_format() == "channels_last":
          input_layer = layers.Input(batch_shape=(1, 2, None, 4))
      else:
          input_layer = layers.Input(batch_shape=(1, 4, 2, None))
      padded = layers.ZeroPadding2D(((1, 2), (3, 4)))(input_layer)
      if backend.config.image_data_format() == "channels_last":
          self.assertEqual(padded.shape, (1, 5, None, 4))
      else:
          self.assertEqual(padded.shape, (1, 4, 5, None))
  
file_path: keras/keras/layers/reshaping/zero_padding2d_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 ZeroPadding2DTest obj's underlying member method code with example usage: obj.test_zero_padding_2d_with_dynamic_spatial_dim() without return types