code: def test_ExpandDim(self):
      inputdata = np.array([2, 1, 6])
      input = Parameter(shape=(3,), init_weight=inputdata)
      expand = ExpandDim(dim=0)(input)
      model = Model(input, expand)
      assert model.get_output_shape() == (1, 3)
      desired = inputdata.reshape(1, 3)
      outputdata = model.forward(inputdata)
      np.testing.assert_almost_equal(outputdata, desired, decimal=4)
  
imports: import keras.backend
  import keras.layers
  import numpy
  import pytest
  from test.zoo.pipeline.utils.test_utils import ZooTestCase
  from zoo.pipeline.api.autograd import *
  import zoo.pipeline.api.autograd
  from zoo.pipeline.api.keras.layers import *
  from zoo.pipeline.api.keras.models import Sequential, Model
  from zoo.pipeline.api.utils import remove_batch
label_desc: Use image node_id 47 for calling the TestOperator obj's underlying member method code with example usage: obj.test_ExpandDim() without return types