old_contents: """
  Tests for scalar maximization.
  
  """
  import numpy as np
  from numpy.testing import assert_almost_equal
  from nose.tools import raises
  from numba import njit
  
  from quantecon.optimize import brent_max
  
  
  @njit
  def f(x):
      """
      A function for testing on.
      """
      return -(x + 2.0)**2 + 1.0
  
  
  def test_brent_max():
      """
      Uses the function f defined above to test the scalar maximization
      routine.
      """
      true_fval = 1.0
      true_xf = -2.0
      xf, fval, info = brent_max(f, -2, 2)
      assert_almost_equal(true_fval, fval, decimal=4)
      assert_almost_equal(true_xf, xf, decimal=4)
  
  
  @njit
  def g(x, y):
      """
      A multivariate function for testing on.
      """
      return -x**2 + y
  
  
  def test_brent_max():
      """
      Uses the function f defined above to test the scalar maximization
      routine.
      """
      y = 5
      true_fval = 5.0
      true_xf = -0.0
      xf, fval, info = brent_max(g, -10, 10, args=(y,))
      assert_almost_equal(true_fval, fval, decimal=4)
      assert_almost_equal(true_xf, xf, decimal=4)
  
  
  @raises(ValueError)
  def test_invalid_a_brent_max():
      brent_max(f, -np.inf, 2)
  
  
  @raises(ValueError)
  def test_invalid_b_brent_max():
      brent_max(f, -2, np.inf)
  
  
  @raises(ValueError)
  def test_invalid_a_b_brent_max():
      brent_max(f, 1, 0)
  
  
  if __name__ == '__main__':
      import sys
      import nose
  
      argv = sys.argv[:]
      argv.append('--verbose')
      argv.append('--nocapture')
      nose.main(argv=argv, defaultTest=__file__)
  
new_contents: """
  Tests for scalar maximization.
  
  """
  import numpy as np
  from numpy.testing import assert_almost_equal
  from nose.tools import raises
  from numba import njit
  
  from quantecon.optimize import brent_max
  
  
  @njit
  def f(x):
      """
      A function for testing on.
      """
      return -(x + 2.0)**2 + 1.0
  
  
  def test_f():
      """
      Uses the function f defined above to test the scalar maximization
      routine.
      """
      true_fval = 1.0
      true_xf = -2.0
      xf, fval, info = brent_max(f, -2, 2)
      assert_almost_equal(true_fval, fval, decimal=4)
      assert_almost_equal(true_xf, xf, decimal=4)
  
  
  @njit
  def g(x, y):
      """
      A multivariate function for testing on.
      """
      return -x**2 + y
  
  
  def test_g():
      """
      Uses the function g defined above to test the scalar maximization
      routine.
      """
      y = 5
      true_fval = 5.0
      true_xf = -0.0
      xf, fval, info = brent_max(g, -10, 10, args=(y,))
      assert_almost_equal(true_fval, fval, decimal=4)
      assert_almost_equal(true_xf, xf, decimal=4)
  
  
  @raises(ValueError)
  def test_invalid_a_brent_max():
      brent_max(f, -np.inf, 2)
  
  
  @raises(ValueError)
  def test_invalid_b_brent_max():
      brent_max(f, -2, np.inf)
  
  
  @raises(ValueError)
  def test_invalid_a_b_brent_max():
      brent_max(f, 1, 0)
  
  
  if __name__ == '__main__':
      import sys
      import nose
  
      argv = sys.argv[:]
      argv.append('--verbose')
      argv.append('--nocapture')
      nose.main(argv=argv, defaultTest=__file__)
  
subject: Fix the names of tests for `brent_max`