def test_raises_exception_for_erroneous_index(self):
layer = Layer(size=3,
prev_size=2,
activation=activation_functions.Sigmoid)
self.assertRaises(IndexError,
lambda: layer.set_bias(row=3, new_value=2))
self.assertRaises(IndexError,
lambda: layer.set_bias(row=30, new_value=2))
def test_set_bias(self):
layer = Layer(size=3,
prev_size=2,
activation=activation_functions.Sigmoid)
layer.set_bias(row=0, new_value=2)
layer.set_bias(row=1, new_value=-0.5)
expected_b = np.array([2, -0.5, 0], float)
self.assertEqual(layer.biases().tolist(), expected_b.tolist())