Function test_pread_alloc

block/src/qcow_common.rs:412–425

()

    #[test]
    fn test_pread_alloc() {
        let temp = TempFile::new().unwrap();
        let file = temp.as_file();
        let data: Vec<u8> = (0..=255).cycle().take(4096).collect();
        file.write_all_at(&data, 0).unwrap();

        let buf = pread_alloc(file.as_raw_fd(), 0, 4096).unwrap();
        assert_eq!(buf, data);

        let buf = pread_alloc(file.as_raw_fd(), 100, 200).unwrap();
        assert_eq!(buf, &data[100..300]);

        pread_alloc(file.as_raw_fd(), 4000, 200).unwrap_err();
    }

    #[test]
    fn test_decompress_cluster() {