def test_wrong_order_type(self):
with self.assertRaises(TypeError):
RandomBiasField(order='wrong')
def test_no_bias(self):
transform = RandomBiasField(coefficients=0.)
transformed = transform(self.sample_subject)
self.assertTensorAlmostEqual(self.sample_subject.t1.data, transformed.t1.data)
def test_negative_order(self):
with self.assertRaises(ValueError):
RandomBiasField(order=-1)
def test_wrong_coefficient_type(self):
with self.assertRaises(ValueError):
RandomBiasField(coefficients='wrong')
def test_no_bias(self):
transform = RandomBiasField(coefficients=0.)
transformed = transform(self.sample)
assert_array_equal(self.sample.t1.data, transformed.t1.data)
def test_with_bias(self):
transform = RandomBiasField(coefficients=0.1)
transformed = transform(self.sample)
with self.assertRaises(AssertionError):
assert_array_equal(self.sample.t1.data, transformed.t1.data)
def test_with_bias(self):
transform = RandomBiasField(coefficients=0.1)
transformed = transform(self.sample)
self.assertTensorNotEqual(self.sample.t1.data, transformed.t1.data)