feat: add tests

__std/misc/src/bin/option_test.rs

@@ -0,0 +1,12 @@
+use std::env;
+
+fn get_name() -> Option<String> {
+    env::var("NAME").ok()
+}
+
+fn main() {
+    match get_name() {
+        None => println!("No NAME"),
+        Some(name) => println!("Found NAME: {}", name),
+    }
+}