code: def test_assign(self):
      a = cupy.zeros(self.size, dtype=cupy.int8)
      a[-1] = 1.0
      assert a.sum() == 1
  
file_path: cupy/tests/cupy_tests/core_tests/test_carray.py
imports: import unittest
  import cupy
  from cupy import testing
label_desc: Use image node_id 3 for calling the TestCArray32BitBoundary obj's underlying member method code with example usage: obj.test_assign() without return types