Rust: Polish off communication across Mojom interfaces

mojo/public/rust/tests/integration.rs

+// Copyright 2016 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+//! Tests some higher-level functionality of Mojom interfaces.
+//!
+//! Test failure is defined as the function returning via panicking
+//! and the result being caught in the test! macro. If a test function
+//! returns without panicking, it is assumed to pass.
+
+#[macro_use]
+extern crate mojo;
+
+#[macro_use]
+mod util;
+
+use mojo::system::{Handle, MOJO_INDEFINITE};
+use mojo::system::message_pipe;
+use mojo::bindings::mojom::{MojomInterface, MojomInterfaceSend, MojomInterfaceRecv};
+
+use std::thread;
+
+use util::mojom_validation::*;
+
+tests! {
+    // Tests basic client and server interaction over a thread
+    fn send_and_recv() {
+        let (endpt0, endpt1) = message_pipe::create(mpflags!(Create::None)).unwrap();
+        // Client and server handles
+        let client = IntegrationTestInterfaceClient::new(endpt0);
+        let server = IntegrationTestInterfaceServer::with_version(endpt1, 0);
+        // Client thread
+        let handle = thread::spawn(move || {
+            // Send request
+            client.send_request(5, IntegrationTestInterfaceMethod0Request {
+                param0: BasicStruct {
+                    a: -1,
+                },
+            }).unwrap();
+            // Wait for response
+            client.pipe().wait(signals!(Signals::Readable), MOJO_INDEFINITE);
+            // Decode response
+            let (req_id, options) = client.recv_response().unwrap();
+            assert_eq!(req_id, 5);
+            match options {
+                IntegrationTestInterfaceResponseOption::IntegrationTestInterfaceMethod0(msg) => {
+                    assert_eq!(msg.param0, vec![1, 2, 3]);
+                },
+            }
+        });
+        // Wait for request
+        server.pipe().wait(signals!(Signals::Readable), MOJO_INDEFINITE);
+        // Decode request
+        let (req_id, options) = server.recv_response().unwrap();
+        assert_eq!(req_id, 5);
+        match options {
+            IntegrationTestInterfaceRequestOption::IntegrationTestInterfaceMethod0(msg) => {
+                assert_eq!(msg.param0.a, -1);
+            },
+        }
+        // Send response
+        server.send_request(5, IntegrationTestInterfaceMethod0Response {
+            param0: vec![1, 2, 3],
+        }).unwrap();
+        let _ = handle.join();
+    }
+}