improve rust test

1 files changed, 7 insertions, 0 deletions

diff --git a/tests/projects/rust/cxx_call_rust_library/src/foo.rs b/tests/projects/rust/cxx_call_rust_library/src/foo.rs
index 38727c484..0c4975fa2 100644
--- a/tests/projects/rust/cxx_call_rust_library/src/foo.rs
+++ b/tests/projects/rust/cxx_call_rust_library/src/foo.rs
@@ -1,3 +1,10 @@
+#[cxx::bridge]
+mod foo {
+    extern "Rust" {
+        fn add(a: i32, b: i32) -> i32;
+    }
+}
+
 pub fn add(a: i32, b: i32) -> i32
 {
     return a + b;