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// Copyright (c) 2010 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.
#ifndef BASE_TEST_MULTIPROCESS_TEST_H_
#define BASE_TEST_MULTIPROCESS_TEST_H_
#pragma once
#include <string>
#include "base/basictypes.h"
#include "base/process.h"
#include "base/process_util.h"
#include "build/build_config.h"
#include "testing/platform_test.h"
class CommandLine;
namespace base {
// A MultiProcessTest is a test class which makes it easier to
// write a test which requires code running out of process.
//
// To create a multiprocess test simply follow these steps:
//
// 1) Derive your test from MultiProcessTest. Example:
//
// class MyTest : public MultiProcessTest {
// };
//
// TEST_F(MyTest, TestCaseName) {
// ...
// }
//
// 2) Create a mainline function for the child processes and include
// testing/multiprocess_func_list.h.
// See the declaration of the MULTIPROCESS_TEST_MAIN macro
// in that file for an example.
// 3) Call SpawnChild("foo"), where "foo" is the name of
// the function you wish to run in the child processes.
// That's it!
class MultiProcessTest : public PlatformTest {
public:
MultiProcessTest();
protected:
// Run a child process.
// 'procname' is the name of a function which the child will
// execute. It must be exported from this library in order to
// run.
//
// Example signature:
// extern "C" int __declspec(dllexport) FooBar() {
// // do client work here
// }
//
// Returns the handle to the child, or NULL on failure
ProcessHandle SpawnChild(const std::string& procname, bool debug_on_start);
#if defined(OS_POSIX)
ProcessHandle SpawnChild(const std::string& procname,
const file_handle_mapping_vector& fds_to_map,
bool debug_on_start);
#endif
// Set up the command line used to spawn the child process.
virtual CommandLine MakeCmdLine(const std::string& procname,
bool debug_on_start);
private:
#if defined(OS_WIN)
ProcessHandle SpawnChildImpl(const std::string& procname,
bool debug_on_start);
#elif defined(OS_POSIX)
// TODO(port): with the CommandLine refactoring, this code is very similar
// to the Windows code. Investigate whether this can be made shorter.
ProcessHandle SpawnChildImpl(const std::string& procname,
const file_handle_mapping_vector& fds_to_map,
bool debug_on_start);
#endif
DISALLOW_COPY_AND_ASSIGN(MultiProcessTest);
};
} // namespace base
#endif // BASE_TEST_MULTIPROCESS_TEST_H_
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