def square_loss_test_non_zero():
    y = 1
    assert_equal(square_loss(y, test_diff()), 1)
def square_loss_test_non_zero():
    y = 1
    assert_equal(square_loss(y, test_diff()), 1)
def square_loss_test_zero():
    y = 1
    assert_equal(square_loss(y, -1), 0)
def square_loss_test_zero():
    y = 1
    assert_equal(square_loss(y, -1), 0)