def test_get_e_value():
error = BackPropagationLogic.get_e_value(np.array([-1, 0, 1]), np.array([-1, 0, 1]))
assert error == 0
error = BackPropagationLogic.get_e_value(np.array([-1, 0, 1]), np.array([-1, 0, 0]))
assert error == 0.5
error = BackPropagationLogic.get_e_value(np.array([-1, 0, 1]), np.array([0, 0, 0]))
assert error == 1.0
error = BackPropagationLogic.get_e_value(np.array([-1, 0, 1]), np.array([0, 0]))
assert error == None
def test_delta_for_output_layer():
output_vec = np.array([1])
predict_vec = np.array([1])
error = BackPropagationLogic.delta_for_output_layer(output_vec, predict_vec)
assert error == [0]
output_vec = np.array([1,2,3])
predict_vec = np.array([1,2,3])
error = BackPropagationLogic.delta_for_output_layer(output_vec, predict_vec)
assert np.all( error == np.array([0, 0, 0]))
output_vec = np.array([1,2,3])
predict_vec = np.array([1,2,2])
error = BackPropagationLogic.delta_for_output_layer(output_vec, predict_vec)
assert np.all( error == np.array([0, 0, 2]))
output_vec = np.array([[1,2,3],[1,2,3]])
predict_vec = np.array([[1,2,3],[1,2,3]])
error = BackPropagationLogic.delta_for_output_layer(output_vec, predict_vec)
assert np.all( error == np.array([[0, 0, 0],[0, 0, 0]]))
def test_delta_for_middle_layer():
assert True
next_wight_mat = np.array([[1,1,1],[1,1,1],[1,1,1]])
next_deleta_vec = np.array([[0,0,0]])
predict_vec = np.array([[1,1,2]])
error = BackPropagationLogic.delta_for_middle_layer(next_wight_mat, next_deleta_vec, predict_vec)
assert np.all( error == np.array([0, 0, 0]))
next_wight_mat = np.array([[1,1,1],[1,1,1],[1,1,1]])
next_deleta_vec = np.array([[0,0,1]])
predict_vec = np.array([[1,1,2]])
error = BackPropagationLogic.delta_for_middle_layer(next_wight_mat, next_deleta_vec, predict_vec)
assert np.all( error == np.array([0, 0, -2]))
next_wight_mat = np.array([[1,1,1],[1,1,1],[1,1,1]])
next_deleta_vec = np.array([[0,1,0]])
predict_vec = np.array([[1,2,1]])
error = BackPropagationLogic.delta_for_middle_layer(next_wight_mat, next_deleta_vec, predict_vec)
assert np.all( error == np.array([0, -2, 0]))