Function test_vlq

blobby/src/encode.rs:149–192

()

    #[test]
    #[rustfmt::skip]
    fn test_vlq() {
        let mut example_buf: &[u8] = &[
            0b0000_0000, // 0
            0b0000_0010, // 2
            0b0111_1111, // 127
            0b1000_0000, 0b0000_0000, // 128
            0b1111_1111, 0b0111_1111, // 16511
            0b1000_0000, 0b1000_0000, 0b0000_0000, // 16512
            0b1111_1111, 0b1111_1111, 0b0111_1111, // 2113663
            0b1000_0000, 0b1000_0000, 0b1000_0000, 0b0000_0000, // 2113664
            0b1111_1111, 0b1111_1111, 0b1111_1111, 0b0111_1111, // 270549119
            0b1111_1111, 0b1111_1111, 0b1111_1111, 0b1111_1111, 0b0111_1111,
        ];

        let targets = [
            (0, 1),
            (2, 1),
            (127, 1),
            (128, 2),
            (16511, 2),
            (16512, 3),
            (2113663, 3),
            (2113664, 4),
            (270549119, 4),
        ];

        let mut buf = [0u8; 4];

        let mut rem_len = example_buf.len();

        for (target_val, target_size) in targets {
            assert_eq!(encode_vlq(target_val, &mut buf), &example_buf[..target_size]);

            let val = read_vlq(&mut example_buf).unwrap();
            assert_eq!(val, target_val);

            rem_len -= target_size;
            assert_eq!(example_buf.len(), rem_len);
            
        }
        
        // Only VLQ values of up to 4 bytes are supported
        assert_eq!(read_vlq(&mut example_buf), Err(Error::InvalidVlq));
    }
}