Add test for returning class with destructor by value

Author: mystor

test/src/header.h

@@ -0,0 +1,13 @@
+#ifndef header_h__
+#define header_h__
+
+class A {
+public:
+  int a;
+  int b;
+  A(int a, int b) : a(a), b(b) {}
+  ~A() {}
+};
+static_assert(sizeof(A) == 8, "size should be 8");
+
+#endif // defined(header_h__)

test/src/lib.rs

@@ -9,8 +9,14 @@ mod inner;
 cpp!{{
     #define _USE_MATH_DEFINES
     #include <math.h>
+    #include "src/header.h"
 }}
 
+#[repr(C)]
+struct A {
+    _opaque: [i32; 2],
+}
+
 #[test]
 fn captures() {
     let x: i32 = 10;
@@ -66,3 +72,18 @@ fn plusplus() {
         assert_eq!(x, 1);
     }
 }
+
+#[test]
+fn destructor() {
+    unsafe {
+        let a = cpp!([] -> A as "A" {
+            return A(5, 10);
+        });
+
+        let first = cpp!([a as "A"] -> i32 as "int32_t" {
+            return a.a;
+        });
+
+        assert_eq!(first, 5);
+    }
+}