Test service as minimum repro for sharing memory handle

services/test/service_unittest.cc

+// 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.
+
+#include "base/memory/ref_counted.h"
+#include "base/run_loop.h"
+#include "base/test/mock_callback.h"
+#include "mojo/public/cpp/bindings/binding.h"
+#include "services/service_manager/public/cpp/service_test.h"
+#include "services/test/public/interfaces/service.mojom.h"
+#include "testing/gmock/include/gmock/gmock.h"
+
+using testing::Exactly;
+using testing::_;
+using testing::InvokeWithoutArgs;
+
+namespace test {
+
+class TestServiceTest : public service_manager::test::ServiceTest {
+ public:
+  TestServiceTest() : service_manager::test::ServiceTest("test_unittests") {}
+  ~TestServiceTest() override {}
+
+  void SetUp() override {
+    service_manager::test::ServiceTest::SetUp();
+    connector()->BindInterface("test", &service_);
+  }
+
+ protected:
+  mojom::ServicePtr service_;
+};
+
+class MockReceiver : public mojom::Receiver {
+ public:
+  MockReceiver(mojom::ReceiverRequest request)
+      : binding_(this, std::move(request)) {}
+  ~MockReceiver() override {}
+
+  // Use forwarding method to work around gmock not supporting move-only types.
+  void ReceiveBufferHandle(
+      mojo::ScopedSharedBufferHandle buffer_handle) override {
+    DoReceiveBufferHandle(&buffer_handle);
+  }
+
+  MOCK_METHOD1(DoReceiveBufferHandle, void(mojo::ScopedSharedBufferHandle*));
+
+ private:
+  const mojo::Binding<mojom::Receiver> binding_;
+};
+
+TEST_F(TestServiceTest, ReceiveTestBufferHandle) {
+  base::RunLoop wait_loop;
+  mojom::ReceiverPtr receiver_proxy;
+  MockReceiver receiver(mojo::MakeRequest(&receiver_proxy));
+  EXPECT_CALL(receiver, DoReceiveBufferHandle(_))
+      .WillOnce(InvokeWithoutArgs([&wait_loop]() { wait_loop.Quit(); }));
+  service_->ShareBufferToTestReceiver(std::move(receiver_proxy));
+  wait_loop.Run();
+}
+
+}  // namespace test