Function create_tmp_file

src/models/buffered_io.rs:860–867

Test util function to create a temp file of size calculated from `num_regions` and `extra` bytes after that. E.g. `create_tmp_file(5, 20)` will create a temp file with 5 regions of BUFFER_SIZE and 20 more bytes in addition to it.

(num_regions: u8, extra: u16)

    /// E.g. `create_tmp_file(5, 20)` will create a temp file with 5
    /// regions of BUFFER_SIZE and 20 more bytes in addition to it.
    fn create_tmp_file(num_regions: u8, extra: u16) -> io::Result<File> {
        let mut file = tempfile()?;
        file.write_all(&vec![
            0_u8;
            (BUFFER_SIZE * num_regions as usize) + extra as usize
        ])?;
        Ok(file)
    }

    /// Test util function to create a temp file of a specific size
    fn create_tmp_file_of_size(size: u16) -> io::Result<File> {