rustlings: move to rust/

1 files changed, 30 insertions, 0 deletions

diff --git a/rust/rustlings/exercises/15_traits/traits2.rs b/rust/rustlings/exercises/15_traits/traits2.rs
new file mode 100644
index 0000000..5dfc36d
--- /dev/null
+++ b/rust/rustlings/exercises/15_traits/traits2.rs
@@ -0,0 +1,30 @@
+trait AppendBar {
+    fn append_bar(self) -> Self;
+}
+
+// TODO: Implement the trait `AppendBar` for a vector of strings.
+// `append_bar` should push the string "Bar" into the vector.
+
+impl AppendBar for Vec<String> {
+    fn append_bar(self) -> Self {
+        let mut s = self.clone();
+        s.push(String::from("Bar"));
+        s
+    }
+}
+
+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");
+    }
+}