code: def test_valid_pad_1d(self):
      actual = aggregated_pad(pad_type="valid", kernel_shape=[4])
  
      expected = [0]
      np.testing.assert_equal(actual, expected)
  
imports: import numpy
  from coremltools.converters.mil.mil.ops.defs._utils import aggregated_pad, effective_kernel, spatial_dimensions_out_shape
label_desc: Use image node_id 9 for calling the TestAggregatePadding obj's underlying member method code with example usage: obj.test_valid_pad_1d() without return types