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// Copyright (c) 2009 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_MULTIPROCESS_TEST_H_
#define BASE_MULTIPROCESS_TEST_H_
#include "base/base_switches.h"
#include "base/command_line.h"
#include "base/process_util.h"
#include "base/string_util.h"
#include "testing/gtest/include/gtest/gtest.h"
#include "testing/multiprocess_func_list.h"
#include "testing/platform_test.h"
#if defined(OS_POSIX)
#include <sys/types.h>
#include <unistd.h>
#endif
// Command line switch to invoke a child process rather than
// to run the normal test suite.
static const char kRunClientProcess[] = "client";
// 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(L"foo"), where "foo" is the name of
// the function you wish to run in the child processes.
// That's it!
//
class MultiProcessTest : public PlatformTest {
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
//
// TODO(darin): re-enable this once we have base/debug_util.h
// ProcessDebugFlags(&cl, DebugUtil::UNKNOWN, false);
base::ProcessHandle SpawnChild(const std::wstring& procname) {
return SpawnChild(procname, false);
}
base::ProcessHandle SpawnChild(const std::wstring& procname,
bool debug_on_start) {
#if defined(OS_WIN)
return SpawnChildImpl(procname, debug_on_start);
#elif defined(OS_POSIX)
base::file_handle_mapping_vector empty_file_list;
return SpawnChildImpl(procname, empty_file_list, debug_on_start);
#endif
}
#if defined(OS_POSIX)
base::ProcessHandle SpawnChild(
const std::wstring& procname,
const base::file_handle_mapping_vector& fds_to_map,
bool debug_on_start) {
return SpawnChildImpl(procname, fds_to_map, debug_on_start);
}
#endif
private:
#if defined(OS_WIN)
base::ProcessHandle SpawnChildImpl(
const std::wstring& procname,
bool debug_on_start) {
CommandLine cl(*CommandLine::ForCurrentProcess());
base::ProcessHandle handle = static_cast<base::ProcessHandle>(NULL);
cl.AppendSwitchWithValue(kRunClientProcess, procname);
if (debug_on_start)
cl.AppendSwitch(switches::kDebugOnStart);
base::LaunchApp(cl, false, true, &handle);
return handle;
}
#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.
base::ProcessHandle SpawnChildImpl(
const std::wstring& procname,
const base::file_handle_mapping_vector& fds_to_map,
bool debug_on_start) {
CommandLine cl(*CommandLine::ForCurrentProcess());
base::ProcessHandle handle = base::kNullProcessHandle;
cl.AppendSwitchWithValue(kRunClientProcess, procname);
if (debug_on_start)
cl.AppendSwitch(switches::kDebugOnStart);
base::LaunchApp(cl.argv(), fds_to_map, false, &handle);
return handle;
}
#endif
};
#endif // BASE_MULTIPROCESS_TEST_H_
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