code: def test_transform_log(shape):
      point = Tensor(randn(shape))
      x = Variable("x", Reals[shape])
      actual = Delta("y", point)(y=ops.log(x))
      expected = Delta("x", point.exp(), -point.sum())
      assert_close(actual, expected)
  
file_path: funsor/test/test_delta.py
imports: import pytest
  import funsor.ops
  from funsor.delta import Delta
  from funsor.domains import Real, Reals
  from funsor.tensor import Tensor, numeric_array
  from funsor.terms import Number, Variable
  from funsor.testing import assert_close, check_funsor, randn
label_desc: Use image node_id 7 for calling a global function with example usage: test_transform_log(shape) without return types