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# Copyright (C) 2011 by Brandon Invergo (b.invergo@gmail.com)
# This code is part of the Biopython distribution and governed by its
# license. Please see the LICENSE file that should have been included
# as part of this package.
import unittest
from Bio.Phylo.PAML import chi2
class ModTest(unittest.TestCase):
def test_cdf_chi2(self):
self.assertRaises(ValueError, chi2.cdf_chi2, df=0, stat=3.84)
self.assertRaises(ValueError, chi2.cdf_chi2, df=1, stat=-3.84)
self.assertRaises(TypeError, chi2.cdf_chi2, df="d", stat="stat")
self.assertAlmostEqual(chi2.cdf_chi2(2, 3.84), 0.1466070, places=5)
def test_ln_gamma(self):
self.assertRaises(ValueError, chi2._ln_gamma_function, -1)
self.assertAlmostEqual(chi2._ln_gamma_function(10), 12.80183,
places=5)
def test_incomplete_gamma(self):
self.assertRaises(ValueError, chi2._incomplete_gamma, x=0.5,
alpha=-1)
self.assertAlmostEqual(chi2._incomplete_gamma(0.5, 0.5), 0.6826895,
places=5)
if __name__ == "__main__":
runner = unittest.TextTestRunner(verbosity=2)
unittest.main(testRunner=runner)