Add test suite beyond the existing demo

Cargo.toml

@@ -29,8 +29,9 @@ thiserror = "1.0"
 cc = "1.0.49"
 
 [dev-dependencies]
+cxx-test-suite = { version = "0", path = "tests/ffi" }
 rustversion = "1.0"
-trybuild = "1.0"
+trybuild = "1.0.21"
 
 [workspace]
-members = ["cmd", "demo-rs", "macro"]
+members = ["cmd", "demo-rs", "macro", "tests/ffi"]

tests/ffi/Cargo.toml

@@ -0,0 +1,14 @@
+[package]
+name = "cxx-test-suite"
+version = "0.0.0"
+edition = "2018"
+publish = false
+
+[lib]
+path = "lib.rs"
+
+[dependencies]
+cxx = { path = "../.." }
+
+[build-dependencies]
+cxx = { path = "../.." }

tests/ffi/build.rs

@@ -0,0 +1,11 @@
+fn main() {
+    if cfg!(trybuild) {
+        return;
+    }
+
+    cxx::Build::new()
+        .bridge("lib.rs")
+        .file("tests.cc")
+        .flag("-std=c++11")
+        .compile("cxx-test-suite");
+}

tests/ffi/lib.rs

@@ -0,0 +1,6 @@
+#[cxx::bridge(namespace = tests)]
+pub mod ffi {
+    extern "C" {
+        include!("tests/ffi/tests.h");
+    }
+}

tests/ffi/tests.cc

@@ -0,0 +1,6 @@
+#include "tests/ffi/lib.rs"
+#include "tests/ffi/tests.h"
+
+namespace tests {
+
+} // namespace tests

tests/ffi/tests.h

@@ -0,0 +1,6 @@
+#pragma once
+#include "include/cxxbridge.h"
+
+namespace tests {
+
+} // namespace tests