88 lines
2.4 KiB
Rust
88 lines
2.4 KiB
Rust
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// Structs contain data, but can also have logic. In this exercise, we have
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// defined the `Package` struct, and we want to test some logic attached to it.
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#[derive(Debug)]
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struct Package {
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sender_country: String,
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recipient_country: String,
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weight_in_grams: u32,
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}
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impl Package {
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fn new(sender_country: String, recipient_country: String, weight_in_grams: u32) -> Self {
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if weight_in_grams < 10 {
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// This isn't how you should handle errors in Rust, but we will
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// learn about error handling later.
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panic!("Can't ship a package with weight below 10 grams");
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}
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Self {
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sender_country,
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recipient_country,
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weight_in_grams,
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}
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}
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// TODO: Add the correct return type to the function signature.
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fn is_international(&self) {
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// TODO: Read the tests that use this method to find out when a package
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// is considered international.
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}
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// TODO: Add the correct return type to the function signature.
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fn get_fees(&self, cents_per_gram: u32) {
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// TODO: Calculate the package's fees.
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}
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}
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fn main() {
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// You can optionally experiment here.
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}
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#[cfg(test)]
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mod tests {
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use super::*;
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#[test]
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#[should_panic]
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fn fail_creating_weightless_package() {
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let sender_country = String::from("Spain");
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let recipient_country = String::from("Austria");
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Package::new(sender_country, recipient_country, 5);
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}
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#[test]
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fn create_international_package() {
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let sender_country = String::from("Spain");
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let recipient_country = String::from("Russia");
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let package = Package::new(sender_country, recipient_country, 1200);
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assert!(package.is_international());
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}
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#[test]
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fn create_local_package() {
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let sender_country = String::from("Canada");
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let recipient_country = sender_country.clone();
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let package = Package::new(sender_country, recipient_country, 1200);
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assert!(!package.is_international());
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}
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#[test]
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fn calculate_transport_fees() {
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let sender_country = String::from("Spain");
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let recipient_country = String::from("Spain");
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let cents_per_gram = 3;
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let package = Package::new(sender_country, recipient_country, 1500);
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assert_eq!(package.get_fees(cents_per_gram), 4500);
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assert_eq!(package.get_fees(cents_per_gram * 2), 9000);
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}
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}
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