def test_log_likelihood_dummy(self):
""" Merely tests if it goes into the right if else bracket """
poisson_likelihood = PoissonLikelihood(
x=self.x, y=self.y, func=lambda x: np.linspace(1, 100, self.N))
with mock.patch('numpy.sum') as m:
m.return_value = 1
self.assertEqual(1, poisson_likelihood.log_likelihood())
class TestJointLikelihood(unittest.TestCase):
def setUp(self):
self.x = np.array([1, 2, 3])
self.y = np.array([1, 2, 3])
self.first_likelihood = GaussianLikelihood(
x=self.x,
y=self.y,
func=lambda x, param1, param2: (param1 + param2) * x,
sigma=1,
)
self.second_likelihood = PoissonLikelihood(
x=self.x, y=self.y, func=lambda x, param2, param3: (param2 + param3) * x
)
self.third_likelihood = ExponentialLikelihood(
x=self.x, y=self.y, func=lambda x, param4, param5: (param4 + param5) * x
)
self.joint_likelihood = JointLikelihood(
self.first_likelihood, self.second_likelihood, self.third_likelihood
)
self.first_likelihood.parameters["param1"] = 1
self.first_likelihood.parameters["param2"] = 2
self.second_likelihood.parameters["param2"] = 2
self.second_likelihood.parameters["param3"] = 3
self.third_likelihood.parameters["param4"] = 4
self.third_likelihood.parameters["param5"] = 5
self.joint_likelihood.parameters["param1"] = 1
self.joint_likelihood.parameters["param2"] = 2
self.joint_likelihood.parameters["param3"] = 3
self.joint_likelihood.parameters["param4"] = 4
self.joint_likelihood.parameters["param5"] = 5
def tearDown(self):
del self.x
del self.y
del self.first_likelihood
del self.second_likelihood
del self.third_likelihood
del self.joint_likelihood
def test_parameters_consistent_from_init(self):
expected = dict(param1=1, param2=2, param3=3, param4=4, param5=5,)
self.assertDictEqual(expected, self.joint_likelihood.parameters)
def test_log_likelihood_correctly_sums(self):
expected = (
self.first_likelihood.log_likelihood()
+ self.second_likelihood.log_likelihood()
+ self.third_likelihood.log_likelihood()
)
self.assertEqual(expected, self.joint_likelihood.log_likelihood())
def test_log_likelihood_checks_parameter_updates(self):
self.first_likelihood.parameters["param2"] = 7
self.second_likelihood.parameters["param2"] = 7
self.joint_likelihood.parameters["param2"] = 7
expected = (
self.first_likelihood.log_likelihood()
+ self.second_likelihood.log_likelihood()
+ self.third_likelihood.log_likelihood()
)
self.assertEqual(expected, self.joint_likelihood.log_likelihood())
def test_list_element_parameters_are_updated(self):
self.joint_likelihood.parameters["param2"] = 7
self.assertEqual(
self.joint_likelihood.parameters["param2"],
self.joint_likelihood.likelihoods[0].parameters["param2"],
)
self.assertEqual(
self.joint_likelihood.parameters["param2"],
self.joint_likelihood.likelihoods[1].parameters["param2"],
)
def test_log_noise_likelihood(self):
self.first_likelihood.noise_log_likelihood = MagicMock(return_value=1)
self.second_likelihood.noise_log_likelihood = MagicMock(return_value=2)
self.third_likelihood.noise_log_likelihood = MagicMock(return_value=3)
self.joint_likelihood = JointLikelihood(
self.first_likelihood, self.second_likelihood, self.third_likelihood
)
expected = (
self.first_likelihood.noise_log_likelihood()
+ self.second_likelihood.noise_log_likelihood()
+ self.third_likelihood.noise_log_likelihood()
)
self.assertEqual(expected, self.joint_likelihood.noise_log_likelihood())
def test_init_with_list_of_likelihoods(self):
with self.assertRaises(ValueError):
JointLikelihood(
[self.first_likelihood, self.second_likelihood, self.third_likelihood]
)
def test_setting_single_likelihood(self):
self.joint_likelihood.likelihoods = self.first_likelihood
self.assertEqual(
self.first_likelihood.log_likelihood(),
self.joint_likelihood.log_likelihood(),
)
def test_setting_likelihood_other(self):
with self.assertRaises(ValueError):
self.joint_likelihood.likelihoods = "test"
def test_log_likelihood_zero_func_return_element(self):
poisson_likelihood = PoissonLikelihood(
x=self.x, y=self.y, func=lambda x: np.array([3, 6, 0])
)
self.assertEqual(-np.inf, poisson_likelihood.log_likelihood())
def test_log_likelihood_negative_func_return_element(self):
poisson_likelihood = PoissonLikelihood(
x=self.x, y=self.y, func=lambda x: np.array([3, 6, -2])
)
with self.assertRaises(ValueError):
poisson_likelihood.log_likelihood()
def test_log_likelihood_wrong_func_return_type(self):
poisson_likelihood = PoissonLikelihood(
x=self.x, y=self.y, func=lambda x: "test"
)
with self.assertRaises(ValueError):
poisson_likelihood.log_likelihood()
def test_neg_rate_array(self):
likelihood = PoissonLikelihood(self.x, self.y, self.function_array)
likelihood.parameters["c"] = -2
with self.assertRaises(ValueError):
likelihood.log_likelihood()
class TestPoissonLikelihood(unittest.TestCase):
def setUp(self):
self.N = 100
self.mu = 5
self.x = np.linspace(0, 1, self.N)
self.y = np.random.poisson(self.mu, self.N)
self.yfloat = np.copy(self.y) * 1.0
self.yneg = np.copy(self.y)
self.yneg[0] = -1
def test_function(x, c):
return c
def test_function_array(x, c):
return np.ones(len(x)) * c
self.function = test_function
self.function_array = test_function_array
self.poisson_likelihood = PoissonLikelihood(self.x, self.y, self.function)
def tearDown(self):
del self.N
del self.mu
del self.x
del self.y
del self.yfloat
del self.yneg
del self.function
del self.function_array
del self.poisson_likelihood
def test_init_y_non_integer(self):
with self.assertRaises(ValueError):
PoissonLikelihood(self.x, self.yfloat, self.function)
def test_init__y_negative(self):
with self.assertRaises(ValueError):
PoissonLikelihood(self.x, self.yneg, self.function)
def test_neg_rate(self):
self.poisson_likelihood.parameters["c"] = -2
with self.assertRaises(ValueError):
self.poisson_likelihood.log_likelihood()
def test_neg_rate_array(self):
likelihood = PoissonLikelihood(self.x, self.y, self.function_array)
likelihood.parameters["c"] = -2
with self.assertRaises(ValueError):
likelihood.log_likelihood()
def test_init_y(self):
self.assertTrue(np.array_equal(self.y, self.poisson_likelihood.y))
def test_set_y_to_array(self):
new_y = np.arange(start=0, stop=50, step=2)
self.poisson_likelihood.y = new_y
self.assertTrue(np.array_equal(new_y, self.poisson_likelihood.y))
def test_set_y_to_positive_int(self):
new_y = 5
self.poisson_likelihood.y = new_y
expected_y = np.array([new_y])
self.assertTrue(np.array_equal(expected_y, self.poisson_likelihood.y))
def test_set_y_to_negative_int(self):
with self.assertRaises(ValueError):
self.poisson_likelihood.y = -5
def test_set_y_to_float(self):
with self.assertRaises(ValueError):
self.poisson_likelihood.y = 5.3
def test_log_likelihood_wrong_func_return_type(self):
poisson_likelihood = PoissonLikelihood(
x=self.x, y=self.y, func=lambda x: "test"
)
with self.assertRaises(ValueError):
poisson_likelihood.log_likelihood()
def test_log_likelihood_negative_func_return_element(self):
poisson_likelihood = PoissonLikelihood(
x=self.x, y=self.y, func=lambda x: np.array([3, 6, -2])
)
with self.assertRaises(ValueError):
poisson_likelihood.log_likelihood()
def test_log_likelihood_zero_func_return_element(self):
poisson_likelihood = PoissonLikelihood(
x=self.x, y=self.y, func=lambda x: np.array([3, 6, 0])
)
self.assertEqual(-np.inf, poisson_likelihood.log_likelihood())
def test_log_likelihood_dummy(self):
""" Merely tests if it goes into the right if else bracket """
poisson_likelihood = PoissonLikelihood(
x=self.x, y=self.y, func=lambda x: np.linspace(1, 100, self.N)
)
with mock.patch("numpy.sum") as m:
m.return_value = 1
self.assertEqual(1, poisson_likelihood.log_likelihood())
def test_repr(self):
likelihood = PoissonLikelihood(self.x, self.y, self.function)
expected = "PoissonLikelihood(x={}, y={}, func={})".format(
self.x, self.y, self.function.__name__
)
self.assertEqual(expected, repr(likelihood))
