code: def test_boxcox_underflow():
      x = 1 + 1e-15
      lmbda = 1e-306
      y = boxcox(x, lmbda)
      assert_allclose(y, np.log(x), rtol=1e-14)
  
file_path: scipy/scipy/special/tests/test_boxcox.py
imports: import numpy
  from numpy.testing import assert_equal, assert_almost_equal, assert_allclose
  from scipy.special import boxcox, boxcox1p, inv_boxcox, inv_boxcox1p
label_desc: Use image node_id 2 for calling a global function with example usage: test_boxcox_underflow() without return types