pub fn build_large_headers() -> Vec<(&'static str, String)> {
    vec![
        ("one", "hello".to_string()),
        ("two", build_large_string('2', 4 * 1024)),
        ("three", "three".to_string()),
        ("four", build_large_string('4', 4 * 1024)),
        ("five", "five".to_string()),
        ("six", build_large_string('6', 4 * 1024)),
        ("seven", "seven".to_string()),
        ("eight", build_large_string('8', 4 * 1024)),
        ("nine", "nine".to_string()),
        ("ten", build_large_string('0', 4 * 1024)),
        ("eleven", build_large_string('1', 32 * 1024)),
    ]
}

fn build_large_string(ch: char, len: usize) -> String {
    let mut ret = String::new();

    for _ in 0..len {
        ret.push(ch);
    }

    ret
}