Function from_lengths

arrow-buffer/src/buffer/offset.rs:399–406

()

    #[test]
    fn from_lengths() {
        let buffer = OffsetBuffer::<i32>::from_lengths([2, 6, 3, 7, 2]);
        assert_eq!(buffer.as_ref(), &[0, 2, 8, 11, 18, 20]);

        let half_max = i32::MAX / 2;
        let buffer = OffsetBuffer::<i32>::from_lengths([half_max as usize, half_max as usize]);
        assert_eq!(buffer.as_ref(), &[0, half_max, half_max * 2]);
    }

    #[test]
    #[should_panic(expected = "offset overflow")]