100 exercises to learn Rust

exercises/02_basic_calculator/03_if_else/src/lib.rs

@@ -0,0 +1,24 @@
+/// Return `true` if `n` is even, `false` otherwise.
+fn is_even(n: u32) -> bool {
+    todo!()
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::is_even;
+
+    #[test]
+    fn one() {
+        assert!(!is_even(1));
+    }
+
+    #[test]
+    fn two() {
+        assert!(is_even(2));
+    }
+
+    #[test]
+    fn high() {
+        assert!(!is_even(231));
+    }
+}