class_docstr: misc unittest
code: def setUp(self):
      super().setUp()
      """setup"""
      self.length = [3, 5, 2]
      self.mask_true = np.array(
          [
              [1, 1, 1, 0, 0],
              [1, 1, 1, 1, 1],
              [1, 1, 0, 0, 0],
          ]
      )
  
file_path: delta/delta/utils/misc_test.py
imports: import numpy
  import delta.compat
  from delta.utils import misc
label_desc: Use image node_id 1 for calling the MiscTest obj's underlying member method code with example usage: obj.setUp() without return types