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// Copyright (c) 2006-2008 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/command_line.h"
#include "base/process_util.h"
#include "testing/gtest/include/gtest/gtest.h"
// Command line switch to invoke a child process rather than
// to run the normal test suite.
static const wchar_t kRunClientProcess[] = L"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.
// 2) Modify your mainline so that if it sees the
// kRunClientProcess switch, it will deal with it.
// 3) Create a mainline function for the child processes
// 4) 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 testing::Test {
public:
// Prototype function for a client function. Multi-process
// clients must provide a callback with this signature to run.
typedef int (__cdecl *ChildFunctionPtr)();
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
HANDLE SpawnChild(const std::wstring& procname) {
std::wstring cl(GetCommandLineW());
CommandLine::AppendSwitchWithValue(&cl, kRunClientProcess, procname);
// TODO(darin): re-enable this once we have base/debug_util.h
//ProcessDebugFlags(&cl, DebugUtil::UNKNOWN, false);
HANDLE handle = NULL;
process_util::LaunchApp(cl, false, true, &handle);
return handle;
}
};
#endif // BASE_MULTIPROCESS_TEST_H__
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