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