code: def test_left_shift(self):
      self.check_binary_int("left_shift")
  
file_path: cupy/tests/cupy_tests/binary_tests/test_elementwise.py
imports: import unittest
  from cupy import testing
label_desc: Use image node_id 7 for calling the TestElementwise obj's underlying member method code with example usage: obj.test_left_shift() without return types