41 lines
1.1 KiB
Python
41 lines
1.1 KiB
Python
"""Regression tests for optimize.
|
|
|
|
"""
|
|
import numpy as np
|
|
from numpy.testing import assert_almost_equal
|
|
from pytest import raises as assert_raises
|
|
|
|
import scipy.optimize
|
|
|
|
|
|
class TestRegression(object):
|
|
|
|
def test_newton_x0_is_0(self):
|
|
# Regression test for gh-1601
|
|
tgt = 1
|
|
res = scipy.optimize.newton(lambda x: x - 1, 0)
|
|
assert_almost_equal(res, tgt)
|
|
|
|
def test_newton_integers(self):
|
|
# Regression test for gh-1741
|
|
root = scipy.optimize.newton(lambda x: x**2 - 1, x0=2,
|
|
fprime=lambda x: 2*x)
|
|
assert_almost_equal(root, 1.0)
|
|
|
|
def test_lmdif_errmsg(self):
|
|
# This shouldn't cause a crash on Python 3
|
|
class SomeError(Exception):
|
|
pass
|
|
counter = [0]
|
|
|
|
def func(x):
|
|
counter[0] += 1
|
|
if counter[0] < 3:
|
|
return x**2 - np.array([9, 10, 11])
|
|
else:
|
|
raise SomeError()
|
|
assert_raises(SomeError,
|
|
scipy.optimize.leastsq,
|
|
func, [1, 2, 3])
|
|
|