From 5015699e0db879adaef18ca0bf48b16f6c26b558 Mon Sep 17 00:00:00 2001
From: Rowan Torbitzky-Lane <rowan.a.tl@protonmail.com>
Date: Sat, 29 Mar 2025 12:20:52 -0500
Subject: [PATCH] unit test part of ch11.3

---
 ch11/test-organization/Cargo.lock |  7 ++++++
 ch11/test-organization/Cargo.toml |  6 +++++
 ch11/test-organization/src/lib.rs | 37 +++++++++++++++++++++++++++++++
 3 files changed, 50 insertions(+)
 create mode 100644 ch11/test-organization/Cargo.lock
 create mode 100644 ch11/test-organization/Cargo.toml
 create mode 100644 ch11/test-organization/src/lib.rs

diff --git a/ch11/test-organization/Cargo.lock b/ch11/test-organization/Cargo.lock
new file mode 100644
index 0000000..84da2bd
--- /dev/null
+++ b/ch11/test-organization/Cargo.lock
@@ -0,0 +1,7 @@
+# This file is automatically @generated by Cargo.
+# It is not intended for manual editing.
+version = 3
+
+[[package]]
+name = "test-organization"
+version = "0.1.0"
diff --git a/ch11/test-organization/Cargo.toml b/ch11/test-organization/Cargo.toml
new file mode 100644
index 0000000..a0b69d9
--- /dev/null
+++ b/ch11/test-organization/Cargo.toml
@@ -0,0 +1,6 @@
+[package]
+name = "test-organization"
+version = "0.1.0"
+edition = "2021"
+
+[dependencies]
diff --git a/ch11/test-organization/src/lib.rs b/ch11/test-organization/src/lib.rs
new file mode 100644
index 0000000..c1cc7d4
--- /dev/null
+++ b/ch11/test-organization/src/lib.rs
@@ -0,0 +1,37 @@
+// Unit tests are small and more focused, testing one module in isolation
+// Integration tests are entirely external and use code in the same
+// way that any other external code would, using only the public
+// interface and potentially exercising mutliple modules per test
+//
+// For unit tests, convention is to create a module in each file
+// named tests for the test functions and annotate the module
+// with cfg(test). Integration tests don't get this
+//
+// For the integration tests section, go back to the adder folder
+// https://rust-book.cs.brown.edu/ch11-03-test-organization.html#integration-tests
+
+pub fn add(left: u64, right: u64) -> u64 {
+    left + right
+}
+
+// Can test internal functions
+fn internal_adder(left: usize, right: usize) -> usize {
+    left + right
+}
+
+#[cfg(test)]
+mod tests {
+    use super::*;
+
+    #[test]
+    fn it_works() {
+        let result = add(2, 2);
+        assert_eq!(result, 4);
+    }
+
+    #[test]
+    fn internal() {
+        let result = internal_adder(2, 2);
+        assert_eq!(result, 4);
+    }
+}