58 lines
1.8 KiB
Python
58 lines
1.8 KiB
Python
from numpy.testing import TestCase, run_module_suite, assert_,\
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assert_array_equal
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from numpy import random
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import numpy as np
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class TestRegression(TestCase):
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def test_VonMises_range(self):
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"""Make sure generated random variables are in [-pi, pi].
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Regression test for ticket #986.
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"""
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for mu in np.linspace(-7., 7., 5):
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r = random.mtrand.vonmises(mu,1,50)
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assert_(np.all(r > -np.pi) and np.all(r <= np.pi))
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def test_hypergeometric_range(self) :
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"""Test for ticket #921"""
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assert_(np.all(np.random.hypergeometric(3, 18, 11, size=10) < 4))
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assert_(np.all(np.random.hypergeometric(18, 3, 11, size=10) > 0))
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def test_logseries_convergence(self) :
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"""Test for ticket #923"""
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N = 1000
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np.random.seed(0)
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rvsn = np.random.logseries(0.8, size=N)
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# these two frequency counts should be close to theoretical
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# numbers with this large sample
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# theoretical large N result is 0.49706795
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freq = np.sum(rvsn == 1) / float(N)
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msg = "Frequency was %f, should be > 0.45" % freq
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assert_(freq > 0.45, msg)
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# theoretical large N result is 0.19882718
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freq = np.sum(rvsn == 2) / float(N)
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msg = "Frequency was %f, should be < 0.23" % freq
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assert_(freq < 0.23, msg)
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def test_permutation_longs(self):
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np.random.seed(1234)
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a = np.random.permutation(12)
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np.random.seed(1234)
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b = np.random.permutation(12L)
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assert_array_equal(a, b)
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def test_hypergeometric_range(self) :
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"""Test for ticket #1690"""
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lmax = np.iinfo('l').max
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lmin = np.iinfo('l').min
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try:
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random.randint(lmin, lmax)
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except:
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raise AssertionError
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if __name__ == "__main__":
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run_module_suite()
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