feat: add tests

__std/misc/src/bin/drop_test.rs

@@ -0,0 +1,17 @@
+#[derive(Debug)]
+struct Object {}
+
+impl Drop for Object {
+    fn drop(&mut self) {
+        println!("Object#drop");
+    }
+}
+
+fn main() {
+    {
+        let object = Object {};
+        println!("Dump: {:?}", object);
+        println!("Block end.");
+    }
+    println!("Main end.");
+}