From e7c14ea67e4a39789e7c1dd3a264c61a9c14050e Mon Sep 17 00:00:00 2001
From: Hunter Kvalevog <hunter@kvog.sh>
Date: Sun, 27 Sep 2026 15:47:45 -0500
Subject: rustlings: complete 15

---
 rustlings/solutions/15_traits/traits1.rs | 32 ++++++++++++++++++++++++++++++--
 1 file changed, 30 insertions(+), 2 deletions(-)

(limited to 'rustlings/solutions/15_traits/traits1.rs')

diff --git a/rustlings/solutions/15_traits/traits1.rs b/rustlings/solutions/15_traits/traits1.rs
index dcf2377..790873f 100644
--- a/rustlings/solutions/15_traits/traits1.rs
+++ b/rustlings/solutions/15_traits/traits1.rs
@@ -1,4 +1,32 @@
+// The trait `AppendBar` has only one function which appends "Bar" to any object
+// implementing this trait.
+trait AppendBar {
+    fn append_bar(self) -> Self;
+}
+
+impl AppendBar for String {
+    fn append_bar(self) -> Self {
+        self + "Bar"
+    }
+}
+
 fn main() {
-    // DON'T EDIT THIS SOLUTION FILE!
-    // It will be automatically filled after you finish the exercise.
+    let s = String::from("Foo");
+    let s = s.append_bar();
+    println!("s: {s}");
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn is_foo_bar() {
+        assert_eq!(String::from("Foo").append_bar(), "FooBar");
+    }
+
+    #[test]
+    fn is_bar_bar() {
+        assert_eq!(String::from("").append_bar().append_bar(), "BarBar");
+    }
 }
-- 
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