code: def test_trivial_case(self):
      trivial = np.zeros((25, 25))
      peak_indices = peak.peak_local_max(trivial, min_distance=1)
      assert type(peak_indices) is np.ndarray
      assert peak_indices.size == 0
  
imports: import itertools
  import numpy
  import pytest
  from numpy.testing import assert_array_almost_equal, assert_array_equal, assert_equal
  from scipy import ndimage
  from skimage._shared._warnings import expected_warnings
  from skimage.feature import peak
label_desc: Use image node_id 1 for calling the TestPeakLocalMax obj's underlying member method code with example usage: obj.test_trivial_case() without return types