use std::collections::HashMap;

fn process_data(data:Vec<i32>)->HashMap<i32,i32>{
let mut result=HashMap::new();
for(index,value)in data.iter().enumerate(){
result.insert(index as i32,*value*2);
}
result
}

#[cfg(test)]
mod tests{
use super::*;

#[test]
fn test_process_data(){
let input=vec![1,2,3,4,5];
let result=process_data(input);
assert_eq!(result.get(&0),Some(&2));
assert_eq!(result.get(&1),Some(&4));
}
}