mirror of
https://github.com/notohh/rustlings.git
synced 2024-12-20 23:48:09 -05:00
27 lines
534 B
Rust
27 lines
534 B
Rust
trait AppendBar {
|
|
fn append_bar(self) -> Self;
|
|
}
|
|
|
|
impl AppendBar for Vec<String> {
|
|
fn append_bar(mut self) -> Self {
|
|
// ^^^ this is important
|
|
self.push(String::from("Bar"));
|
|
self
|
|
}
|
|
}
|
|
|
|
fn main() {
|
|
// You can optionally experiment here.
|
|
}
|
|
|
|
#[cfg(test)]
|
|
mod tests {
|
|
use super::*;
|
|
|
|
#[test]
|
|
fn is_vec_pop_eq_bar() {
|
|
let mut foo = vec![String::from("Foo")].append_bar();
|
|
assert_eq!(foo.pop().unwrap(), "Bar");
|
|
assert_eq!(foo.pop().unwrap(), "Foo");
|
|
}
|
|
}
|