From b571a7be8b4a8f4756e876574f0e8acb5a3fe17e Mon Sep 17 00:00:00 2001
From: Rowan Torbitzky-Lane <rowan.a.tl@protonmail.com>
Date: Fri, 28 Mar 2025 21:43:05 -0500
Subject: [PATCH] start of testing chapter

---
 ch11/adder/Cargo.lock |  7 +++++++
 ch11/adder/Cargo.toml |  6 ++++++
 ch11/adder/src/lib.rs | 15 +++++++++++++++
 3 files changed, 28 insertions(+)
 create mode 100644 ch11/adder/Cargo.lock
 create mode 100644 ch11/adder/Cargo.toml
 create mode 100644 ch11/adder/src/lib.rs

diff --git a/ch11/adder/Cargo.lock b/ch11/adder/Cargo.lock
new file mode 100644
index 0000000..8b8c69d
--- /dev/null
+++ b/ch11/adder/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "adder"
+version = "0.1.0"
diff --git a/ch11/adder/Cargo.toml b/ch11/adder/Cargo.toml
new file mode 100644
index 0000000..e61cb12
--- /dev/null
+++ b/ch11/adder/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "adder"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/ch11/adder/src/lib.rs b/ch11/adder/src/lib.rs
new file mode 100644
index 0000000..0bcd5ea
--- /dev/null
+++ b/ch11/adder/src/lib.rs
@@ -0,0 +1,15 @@
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    // #[test] indicates this is a test function
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+}