rustlings/exercises/structs/structs3.rs

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// structs3.rs
// Structs contain more than simply some data, they can also have logic, in this
// exercise we have defined the Package struct and we want to test some logic attached to it,
// make the code compile and the tests pass! If you have issues execute `rustlings hint structs3`
// I AM NOT DONE
#[derive(Debug)]
struct Package {
sender_country: String,
recipient_country: String,
weight_in_grams: i32,
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}
impl Package {
fn new(sender_country: String, recipient_country: String, weight_in_grams: i32) -> Package {
if weight_in_grams <= 0 {
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// Something goes here...
} else {
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return Package {
sender_country,
recipient_country,
weight_in_grams,
};
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}
}
fn is_international(&self) -> ??? {
// Something goes here...
}
fn get_fees(&self, cents_per_gram: i32) -> ??? {
// Something goes here...
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}
}
#[cfg(test)]
mod tests {
use super::*;
#[test]
#[should_panic]
fn fail_creating_weightless_package() {
let sender_country = String::from("Spain");
let recipient_country = String::from("Austria");
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Package::new(sender_country, recipient_country, -2210);
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}
#[test]
fn create_international_package() {
let sender_country = String::from("Spain");
let recipient_country = String::from("Russia");
let package = Package::new(sender_country, recipient_country, 1200);
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assert!(package.is_international());
}
#[test]
fn calculate_transport_fees() {
let sender_country = String::from("Spain");
let recipient_country = String::from("Spain");
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let cents_per_gram = ???;
let package = Package::new(sender_country, recipient_country, 1500);
assert_eq!(package.get_fees(cents_per_gram), 4500);
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}
}