Mojo C++ Bindings: Eliminate unbound ThreadSafeInterfacePtr

ipc/ipc_mojo_bootstrap_unittest.cc

 // Copyright 2014 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 "ipc/ipc_mojo_bootstrap.h"
 
 #include <stdint.h>
 #include <memory>
 
 #include "base/base_paths.h"
 #include "base/files/file.h"
 #include "base/message_loop/message_loop.h"
 #include "base/run_loop.h"
 #include "base/threading/thread_task_runner_handle.h"
 #include "build/build_config.h"
 #include "ipc/ipc.mojom.h"
 #include "ipc/ipc_test_base.h"
 #include "mojo/edk/embedder/embedder.h"
 #include "mojo/edk/test/mojo_test_base.h"
 #include "mojo/edk/test/multiprocess_test_helper.h"
+#include "mojo/public/cpp/bindings/associated_binding.h"
 
 #if defined(OS_POSIX)
 #include "base/file_descriptor_posix.h"
 #endif
 
 namespace {
 
+constexpr int32_t kTestServerPid = 42;
+constexpr int32_t kTestClientPid = 4242;
+
+class PeerPidReceiver : public IPC::mojom::Channel {
+ public:
+  PeerPidReceiver(IPC::mojom::ChannelAssociatedRequest request,
+                  const base::Closure& on_peer_pid_set)
+      : binding_(this, std::move(request)), on_peer_pid_set_(on_peer_pid_set) {}
+  ~PeerPidReceiver() override {}
+
+  // mojom::Channel:
+  void SetPeerPid(int32_t pid) override {
+    peer_pid_ = pid;
+    on_peer_pid_set_.Run();
+  }
+
+  void Receive(const std::vector<uint8_t>& data,
+               base::Optional<std::vector<IPC::mojom::SerializedHandlePtr>>
+                   handles) override {}
+
+  void GetAssociatedInterface(
+      const std::string& name,
+      IPC::mojom::GenericInterfaceAssociatedRequest request) override {}
+
+  int32_t peer_pid() const { return peer_pid_; }
+
+ private:
+  mojo::AssociatedBinding<IPC::mojom::Channel> binding_;
+  const base::Closure on_peer_pid_set_;
+  int32_t peer_pid_ = -1;
+
+  DISALLOW_COPY_AND_ASSIGN(PeerPidReceiver);
+};
+
 class IPCMojoBootstrapTest : public testing::Test {
  protected:
   mojo::edk::test::MultiprocessTestHelper helper_;
 };
 
-class TestingDelegate : public IPC::MojoBootstrap::Delegate {
- public:
-  explicit TestingDelegate(const base::Closure& quit_callback)
-      : passed_(false), quit_callback_(quit_callback) {}
-
-  void OnPipesAvailable(
-      IPC::mojom::ChannelAssociatedPtr sender,
-      IPC::mojom::ChannelAssociatedRequest receiver) override;
-
-  bool passed() const { return passed_; }
-
- private:
-  bool passed_;
-  const base::Closure quit_callback_;
-};
-
-void TestingDelegate::OnPipesAvailable(
-    IPC::mojom::ChannelAssociatedPtr sender,
-    IPC::mojom::ChannelAssociatedRequest receiver) {
-  passed_ = true;
-  quit_callback_.Run();
-}
-
 TEST_F(IPCMojoBootstrapTest, Connect) {
   base::MessageLoop message_loop;
-  base::RunLoop run_loop;
-  TestingDelegate delegate(run_loop.QuitClosure());
   std::unique_ptr<IPC::MojoBootstrap> bootstrap = IPC::MojoBootstrap::Create(
       helper_.StartChild("IPCMojoBootstrapTestClient"),
-      IPC::Channel::MODE_SERVER, &delegate,
-      base::ThreadTaskRunnerHandle::Get());
+      IPC::Channel::MODE_SERVER, base::ThreadTaskRunnerHandle::Get());
 
-  bootstrap->Connect();
+  IPC::mojom::ChannelAssociatedPtr sender;
+  IPC::mojom::ChannelAssociatedRequest receiver;
+  bootstrap->Connect(&sender, &receiver);
+  sender->SetPeerPid(kTestServerPid);
+
+  base::RunLoop run_loop;
+  PeerPidReceiver impl(std::move(receiver), run_loop.QuitClosure());
   run_loop.Run();
 
-  EXPECT_TRUE(delegate.passed());
+  EXPECT_EQ(kTestClientPid, impl.peer_pid());
+
   EXPECT_TRUE(helper_.WaitForChildTestShutdown());
 }
 
 // A long running process that connects to us.
 MULTIPROCESS_TEST_MAIN_WITH_SETUP(
     IPCMojoBootstrapTestClientTestChildMain,
     ::mojo::edk::test::MultiprocessTestHelper::ChildSetup) {
   base::MessageLoop message_loop;
-  base::RunLoop run_loop;
-  TestingDelegate delegate(run_loop.QuitClosure());
   std::unique_ptr<IPC::MojoBootstrap> bootstrap = IPC::MojoBootstrap::Create(
       std::move(mojo::edk::test::MultiprocessTestHelper::primordial_pipe),
-      IPC::Channel::MODE_CLIENT, &delegate,
-      base::ThreadTaskRunnerHandle::Get());
+      IPC::Channel::MODE_CLIENT, base::ThreadTaskRunnerHandle::Get());
 
-  bootstrap->Connect();
+  IPC::mojom::ChannelAssociatedPtr sender;
+  IPC::mojom::ChannelAssociatedRequest receiver;
+  bootstrap->Connect(&sender, &receiver);
+  sender->SetPeerPid(kTestClientPid);
 
+  base::RunLoop run_loop;
+  PeerPidReceiver impl(std::move(receiver), run_loop.QuitClosure());
   run_loop.Run();
 
-  return delegate.passed() ? 0 : 1;
+  EXPECT_EQ(kTestServerPid, impl.peer_pid());
+
+  return 0;
 }
 
 }  // namespace