68 lines
1.7 KiB
Rust
68 lines
1.7 KiB
Rust
// 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`
|
|
|
|
#[derive(Debug)]
|
|
struct Package {
|
|
from: String,
|
|
to: String,
|
|
weight: f32,
|
|
}
|
|
|
|
impl Package {
|
|
fn new(from: String, to: String, weight: f32) -> Package {
|
|
if weight <= 0.0 {
|
|
let msg = format!("Weight must be greater than 0, {} specified", weight);
|
|
panic!(msg)
|
|
} else {
|
|
return Package { from, to, weight };
|
|
}
|
|
}
|
|
|
|
fn is_international(&self) -> bool {
|
|
if self.from == self.to {
|
|
false
|
|
} else {
|
|
true
|
|
}
|
|
}
|
|
|
|
fn get_fees(&self, cost_per_kg: f32) -> f32 {
|
|
self.weight * cost_per_kg
|
|
}
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
#[should_panic]
|
|
fn fail_creating_weightless_package() {
|
|
let country_from = String::from("Spain");
|
|
let country_to = String::from("Austria");
|
|
|
|
Package::new(country_from, country_to, -2.21);
|
|
}
|
|
|
|
#[test]
|
|
fn create_international_package() {
|
|
let country_from = String::from("Spain");
|
|
let country_to = String::from("Russia");
|
|
let package = Package::new(country_from, country_to, 1.2);
|
|
|
|
assert!(package.is_international());
|
|
}
|
|
|
|
#[test]
|
|
fn calculate_transport_fees() {
|
|
let country_from = String::from("Spain");
|
|
let country_to = String::from("Spain");
|
|
|
|
let country_fee = 8.;
|
|
let package = Package::new(country_from, country_to, 22.0);
|
|
assert_eq!(package.get_fees(country_fee), 176.0);
|
|
}
|
|
}
|