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import math
from unittest import TestCase
from cmaes import _stats
# Test Cases in this file is generated by SciPy v1.9.3
class TestNormCDF(TestCase):
def test_standard_normal_distribution(self):
self.assertAlmostEqual(_stats.norm_cdf(-30), 4.906713927147907e-198, places=205)
self.assertAlmostEqual(_stats.norm_cdf(-10), 7.619853024160469e-24, places=30)
self.assertAlmostEqual(_stats.norm_cdf(-1), 0.15865525393145707)
self.assertAlmostEqual(_stats.norm_cdf(0), 0.5)
self.assertAlmostEqual(_stats.norm_cdf(1), 0.8413447460685429)
self.assertAlmostEqual(
_stats.norm_cdf(8),
0.9999999999999993338661852249060757458209991455078125,
places=30,
)
self.assertAlmostEqual(_stats.norm_cdf(10), 1.0)
def test_mu_and_sigma(self):
self.assertAlmostEqual(_stats.norm_cdf(1, loc=2, scale=3), 0.36944134018176367)
class TestChi2PPF(TestCase):
def test(self):
self.assertAlmostEqual(_stats.chi2_ppf(0.0), 0.0)
self.assertAlmostEqual(
_stats.chi2_ppf(0.00000001), 1.5707963267948962e-16, places=25
)
self.assertAlmostEqual(_stats.chi2_ppf(0.5), 0.454936423119572)
self.assertAlmostEqual(_stats.chi2_ppf(0.99999999), 32.84125335146885)
self.assertAlmostEqual(
_stats.chi2_ppf(0.999999999999999777955395074969), 67.39648382445012
)
self.assertAlmostEqual(_stats.chi2_ppf(1.0), math.inf)
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