feat: add async function calling test

libs/common/src/platform/services/sdk/rpc/rpc.spec.ts

@@ -30,6 +30,14 @@ describe("RpcServer", () => {
 
     expect(result).toBe("Hello, World!");
   });
+
+  it("calls async function and returns value", async () => {
+    const remoteInstance = await firstValueFrom(client.getRoot());
+
+    const result = await remoteInstance.greetAsync("Async World");
+
+    expect(result).toBe("Hello, Async World!");
+  });
 });
 
 class TestClass {
@@ -38,6 +46,10 @@ class TestClass {
   greet(name: string): string {
     return `Hello, ${name}!`;
   }
+
+  async greetAsync(name: string): Promise<string> {
+    return `Hello, ${name}!`;
+  }
 }
 
 class InMemoryChannel implements RpcRequestChannel {