code: def test_backprop_given_input_grad(method):
      shape = (1,)
      dtype = chainerx.float32
  
      xs = (chainerx.full(shape, 1, dtype).require_grad(),)
      expected_gx_value = 2 if method == "backward" else 1
      expected_gxs = (chainerx.full(shape, expected_gx_value, dtype),)
  
      def fprop(x):
          x.set_grad(chainerx.full(shape, 1, dtype))
          return (x.copy(),)
  
      _check_backprop(method, fprop, xs, expected_gxs)
  
imports: import chainerx
  import pytest
label_desc: Use image node_id 17 for calling a global function with example usage: test_backprop_given_input_grad(method) and returns: x