code: import unittest
  import numpy as np
  
  from megnet.utils.general import expand_1st, to_list, fast_label_binarize
  
  
  class TestGeneralUtils(unittest.TestCase):
      def test_expand_dim(self):
          x = np.array([1, 2, 3])
          self.assertListEqual(list(expand_1st(x).shape), [1, 3])
  
      def test_to_list(self):
          x = 1
          y = [1]
          z = tuple([1, 2, 3])
          v = np.array([1, 2, 3])
          k = np.array([[1, 2], [3, 4]])
          for k in [x, y, z, v, k]:
              self.assertTrue(type(to_list(k)), list)
  
      def test_fast_label_binarize(self):
          binaries = fast_label_binarize(1, [0, 1])
          self.assertListEqual(binaries, [0])
          binaries = fast_label_binarize(1, [0, 1, 2])
          self.assertListEqual(binaries, [0, 1, 0])
  
  
  if __name__ == "__main__":
      unittest.main()
  
apis: numpy.array