def test_log_likelihood_nu_none(self):
likelihood = StudentTLikelihood(self.x, self.y, self.function, nu=None)
likelihood.parameters["m"] = 2
likelihood.parameters["c"] = 0
with self.assertRaises((ValueError, TypeError)):
# ValueError in Python2, TypeError in Python3
likelihood.log_likelihood()
def test_known_sigma(self):
likelihood = StudentTLikelihood(self.x, self.y, self.function, self.nu,
self.sigma)
likelihood.parameters['m'] = 2
likelihood.parameters['c'] = 0
likelihood.log_likelihood()
self.assertEqual(likelihood.sigma, self.sigma)
def test_log_likelihood_nu_negative(self):
likelihood = StudentTLikelihood(self.x, self.y, self.function, nu=-1)
likelihood.parameters["m"] = 2
likelihood.parameters["c"] = 0
with self.assertRaises(ValueError):
likelihood.log_likelihood()
def test_log_likelihood_nu_zero(self):
likelihood = StudentTLikelihood(self.x, self.y, self.function, nu=0)
likelihood.parameters['m'] = 2
likelihood.parameters['c'] = 0
with self.assertRaises(ValueError):
likelihood.log_likelihood()
