code: def test_value(self):
      X = np.linspace(0, 1, 10)[:, None]
      with pm.Model() as model:
          zero_mean = pm.gp.mean.Zero()
      M = zero_mean(X).eval()
      assert np.all(M == 0)
      assert M.shape == (10,)
  
file_path: pymc/tests/gp/test_mean.py
imports: import numpy
  import numpy.testing
  import pymc
label_desc: Use image node_id 1 for calling the TestZeroMean obj's underlying member method code with example usage: obj.test_value() without return types