code: def test_block_docstring(self):
      expected = "bar : 'i'-array(2,3)\n"
      assert self.module.block.__doc__ == expected
  
imports: import sys
  import pytest
  from .None import util
  from numpy.testing import IS_PYPY
label_desc: Use image node_id 1 for calling the TestBlockDocString obj's underlying member method code with example usage: obj.test_block_docstring() without return types