initial commit

exercises/02_basic_calculator/03_if_else/Cargo.toml

@@ -0,0 +1,10 @@
+[package]
+name = "if_else"
+version = "0.1.0"
+edition = "2021"
+
+[lints.rust]
+# We silence dead code warnings for the time being in order to reduce
+# compiler noise.
+# We'll re-enable them again once we explain how visibility works in Rust.
+dead_code = "allow"

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

@@ -0,0 +1,36 @@
+/// Return `12` if `n` is even,
+/// `13` if `n` is divisible by `3`,
+/// `17` otherwise.
+fn magic_number(n: u32) -> u32 {
+    todo!()
+}
+
+#[cfg(test)]
+mod tests {
+    use crate::magic_number;
+
+    #[test]
+    fn one() {
+        assert_eq!(magic_number(1), 17);
+    }
+
+    #[test]
+    fn two() {
+        assert_eq!(magic_number(2), 12);
+    }
+
+    #[test]
+    fn six() {
+        assert_eq!(magic_number(6), 12);
+    }
+
+    #[test]
+    fn nine() {
+        assert_eq!(magic_number(9), 13);
+    }
+
+    #[test]
+    fn high() {
+        assert_eq!(magic_number(233), 17);
+    }
+}