def test_with_single_hidden_layer(self):
layer = Layer(size=3,
prev_size=2,
activation=activation_functions.Sigmoid)
biases = [-2, 0.5, 9]
layer.set_biases(biases=np.array(biases, float))
self.assertEqual(layer.biases().tolist(), [-2, 0.5, 9])
def test_raises_exception_for_array_with_wrong_dimension(self):
layer = Layer(size=5,
prev_size=2,
activation=activation_functions.Sigmoid)
self.assertRaises(Layer.InvalidMatrixDimensions,
lambda: layer.set_biases(biases=np.zeros((2, 2))))
self.assertRaises(Layer.InvalidMatrixDimensions,
lambda: layer.set_biases(biases=np.zeros((4, 3))))