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29 lines
619 B
Rust
29 lines
619 B
Rust
trait AppendBar {
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fn append_bar(self) -> Self;
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}
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// TODO: Implement the trait `AppendBar` for a vector of strings.
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// `append_bar` should push the string "Bar" into the vector.
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impl AppendBar for Vec<String>{
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fn append_bar(mut self) -> Self {
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self.push("Bar".to_string());
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self
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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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fn is_vec_pop_eq_bar() {
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let mut foo = vec![String::from("Foo")].append_bar();
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assert_eq!(foo.pop().unwrap(), "Bar");
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assert_eq!(foo.pop().unwrap(), "Foo");
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}
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}
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