ipc/ipc_test_base.h

   1 // Copyright (c) 2011 The Chromium Authors. All rights reserved.
   2 // Use of this source code is governed by a BSD-style license that can be
   3 // found in the LICENSE file.
   4
   5 #ifndef IPC_IPC_TEST_BASE_H_
   6 #define IPC_IPC_TEST_BASE_H_
   7
   8 #include <string>
   9
  10 #include "base/basictypes.h"
  11 #include "base/memory/scoped_ptr.h"
  12 #include "base/process/process.h"
  13 #include "base/test/multiprocess_test.h"
  14 #include "ipc/ipc_channel.h"
  15 #include "ipc/ipc_channel_factory.h"
  16 #include "ipc/ipc_channel_proxy.h"
  17 #include "ipc/ipc_multiprocess_test.h"
  18
  19 namespace base {
  20 class MessageLoop;
  21 }
  22
  23 // A test fixture for multiprocess IPC tests. Such tests include a "client" side
  24 // (running in a separate process). The same client may be shared between
  25 // several different tests.
  26 class IPCTestBase : public base::MultiProcessTest {
  27  public:
  28   // The channel name is based on the client's name. This is a public static
  29   // helper to be used by the client-side code; server-side test code should
  30   // usually not use this (directly).
  31   static std::string GetChannelName(const std::string& test_client_name);
  32
  33  protected:
  34   IPCTestBase();
  35   ~IPCTestBase() override;
  36
  37   void TearDown() override;
  38
  39   // Initializes the test to use the given client and creates an IO message loop
  40   // on the current thread.
  41   void Init(const std::string& test_client_name);
  42   // Some tests create separate thread for IO message loop and run non-IO
  43   // message loop on the main thread. As IPCTestBase creates IO message loop by
  44   // default, such tests need to provide a custom message loop for the main
  45   // thread.
  46   void InitWithCustomMessageLoop(const std::string& test_client_name,
  47                                  scoped_ptr<base::MessageLoop> message_loop);
  48
  49   // Creates a channel with the given listener and connects to the channel
  50   // (returning true if successful), respectively. Use these to use a channel
  51   // directly. Since the listener must outlive the channel, you must destroy the
  52   // channel before the listener gets destroyed.
  53   void CreateChannel(IPC::Listener* listener);
  54   bool ConnectChannel();
  55   void DestroyChannel();
  56
  57   // Releases or replaces existing channel.
  58   // These are useful for testing specific types of channel subclasses.
  59   scoped_ptr<IPC::Channel> ReleaseChannel();
  60   void SetChannel(scoped_ptr<IPC::Channel> channel);
  61
  62   // Use this instead of CreateChannel() if you want to use some different
  63   // channel specification (then use ConnectChannel() as usual).
  64   void CreateChannelFromChannelHandle(const IPC::ChannelHandle& channel_handle,
  65                                       IPC::Listener* listener);
  66
  67   // Creates a channel proxy with the given listener and task runner. (The
  68   // channel proxy will automatically create and connect a channel.) You must
  69   // (manually) destroy the channel proxy before the task runner's thread is
  70   // destroyed.
  71   void CreateChannelProxy(
  72       IPC::Listener* listener,
  73       const scoped_refptr<base::SingleThreadTaskRunner>& ipc_task_runner);
  74   void DestroyChannelProxy();
  75
  76   // Starts the client process, returning true if successful; this should be
  77   // done after connecting to the channel.
  78   bool StartClient();
  79
  80 #if defined(OS_POSIX)
  81   // A StartClient() variant that allows caller to pass the FD of IPC pipe
  82   bool StartClientWithFD(int ipcfd);
  83 #endif
  84
  85   // Waits for the client to shut down, returning true if successful. Note that
  86   // this does not initiate client shutdown; that must be done by the test
  87   // (somehow). This must be called before the end of the test whenever
  88   // StartClient() was called successfully.
  89   bool WaitForClientShutdown();
  90
  91   IPC::ChannelHandle GetTestChannelHandle();
  92
  93   // Use this to send IPC messages (when you don't care if you're using a
  94   // channel or a proxy).
  95   IPC::Sender* sender() {
  96     return channel_.get() ? static_cast<IPC::Sender*>(channel_.get()) :
  97                             static_cast<IPC::Sender*>(channel_proxy_.get());
  98   }
  99
 100   IPC::Channel* channel() { return channel_.get(); }
 101   IPC::ChannelProxy* channel_proxy() { return channel_proxy_.get(); }
 102
 103   const base::ProcessHandle& client_process() const { return client_process_; }
 104   scoped_refptr<base::TaskRunner> task_runner();
 105
 106   virtual scoped_ptr<IPC::ChannelFactory> CreateChannelFactory(
 107       const IPC::ChannelHandle& handle, base::TaskRunner* runner);
 108
 109   virtual bool DidStartClient();
 110
 111  private:
 112   std::string GetTestMainName() const;
 113
 114   std::string test_client_name_;
 115   scoped_ptr<base::MessageLoop> message_loop_;
 116
 117   scoped_ptr<IPC::Channel> channel_;
 118   scoped_ptr<IPC::ChannelProxy> channel_proxy_;
 119
 120   base::ProcessHandle client_process_;
 121
 122   DISALLOW_COPY_AND_ASSIGN(IPCTestBase);
 123 };
 124
 125 // Use this to declare the client side for tests using IPCTestBase.
 126 #define MULTIPROCESS_IPC_TEST_CLIENT_MAIN(test_client_name) \
 127     MULTIPROCESS_IPC_TEST_MAIN(test_client_name ## TestClientMain)
 128
 129 #endif  // IPC_IPC_TEST_BASE_H_