added tests and fixed a issue with types

cli/js/lib.deno_runtime.d.ts

@@ -978,7 +978,7 @@ declare namespace Deno {
       control: Uint8Array,
       zeroCopy?: ArrayBufferView | null
     ): Uint8Array | null;
-    setAsyncHandler(handler: MessageCallback): void;
+    setAsyncHandler(handler: AsyncHandler): void;
   }
 
   export interface NativePlugin {

cli/tests/052_native_plugins.ts

@@ -0,0 +1,29 @@
+const filenameBase = "test_native_plugin";
+
+let filenameSuffix = ".so";
+let filenamePrefix = "lib";
+
+if (Deno.build.os === "win") {
+  filenameSuffix = ".dll";
+  filenamePrefix = "";
+}
+if (Deno.build.os === "mac") {
+  filenameSuffix = ".dylib";
+}
+
+const filename = `${filenamePrefix}${filenameBase}${filenameSuffix}`;
+
+const plugin = Deno.openPlugin(`./../../target/${Deno.args[1]}/${filename}`);
+
+// eslint-disable-next-line @typescript-eslint/camelcase
+const test_io_sync = plugin.ops.test_io_sync;
+
+const textDecoder = new TextDecoder();
+
+// eslint-disable-next-line @typescript-eslint/camelcase
+const response = test_io_sync.dispatch(
+  new Uint8Array([116, 101, 115, 116]),
+  new Uint8Array([116, 101, 115, 116])
+);
+
+console.log(`Native Binding Response: ${textDecoder.decode(response)}`);

cli/tests/052_native_plugins.ts.out

@@ -0,0 +1,2 @@
+Hello from native bindings. data: test | zero_copy: test
+Native Binding Response: test

cli/tests/integration_tests.rs

@@ -356,6 +356,20 @@ itest!(_051_wasm_import {
   http_server: true,
 });
 
+#[cfg(not(debug_assertions))]
+itest!(_052_native_plugins_release {
+  args: "run --reload --allow-native 052_native_plugins.ts release",
+  output: "052_native_plugins.ts.out",
+  http_server: false,
+});
+
+#[cfg(debug_assertions)]
+itest!(_052_native_plugins_debug {
+  args: "run --reload --allow-native 052_native_plugins.ts debug",
+  output: "052_native_plugins.ts.out",
+  http_server: false,
+});
+
 itest!(lock_check_ok {
   args: "run --lock=lock_check_ok.json http://127.0.0.1:4545/cli/tests/003_relative_import.ts",
   output: "003_relative_import.ts.out",

cli/tests/test_native_plugin/mod.ts

@@ -1,6 +0,0 @@
-const plugin = Deno.openPlugin(
-  "./../../../target/debug/libtest_native_plugin.so"
-);
-const op_test_io_async = plugin.ops.op_test_io_async;
-
-console.log(op_test_io_async);