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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.
#include "base/tuple.h"
#include <gtest/gtest.h>
#include "base/compiler_specific.h"
namespace base {
namespace {
void DoAdd(int a, int b, int c, int* res) {
*res = a + b + c;
}
struct Addy {
Addy() { }
void DoAdd(int a, int b, int c, int d, int* res) {
*res = a + b + c + d;
}
};
struct Addz {
Addz() { }
void DoAdd(int a, int b, int c, int d, int e, int* res) {
*res = a + b + c + d + e;
}
};
} // namespace
TEST(TupleTest, Basic) {
base::Tuple<> t0 = base::MakeTuple();
ALLOW_UNUSED_LOCAL(t0);
base::Tuple<int> t1(1);
base::Tuple<int, const char*> t2 =
base::MakeTuple(1, static_cast<const char*>("wee"));
base::Tuple<int, int, int> t3(1, 2, 3);
base::Tuple<int, int, int, int*> t4(1, 2, 3, &get<0>(t1));
base::Tuple<int, int, int, int, int*> t5(1, 2, 3, 4, &get<0>(t4));
base::Tuple<int, int, int, int, int, int*> t6(1, 2, 3, 4, 5, &get<0>(t4));
EXPECT_EQ(1, get<0>(t1));
EXPECT_EQ(1, get<0>(t2));
EXPECT_EQ(1, get<0>(t3));
EXPECT_EQ(2, get<1>(t3));
EXPECT_EQ(3, get<2>(t3));
EXPECT_EQ(1, get<0>(t4));
EXPECT_EQ(2, get<1>(t4));
EXPECT_EQ(3, get<2>(t4));
EXPECT_EQ(1, get<0>(t5));
EXPECT_EQ(2, get<1>(t5));
EXPECT_EQ(3, get<2>(t5));
EXPECT_EQ(4, get<3>(t5));
EXPECT_EQ(1, get<0>(t6));
EXPECT_EQ(2, get<1>(t6));
EXPECT_EQ(3, get<2>(t6));
EXPECT_EQ(4, get<3>(t6));
EXPECT_EQ(5, get<4>(t6));
EXPECT_EQ(1, get<0>(t1));
DispatchToFunction(&DoAdd, t4);
EXPECT_EQ(6, get<0>(t1));
int res = 0;
DispatchToFunction(&DoAdd, base::MakeTuple(9, 8, 7, &res));
EXPECT_EQ(24, res);
Addy addy;
EXPECT_EQ(1, get<0>(t4));
DispatchToMethod(&addy, &Addy::DoAdd, t5);
EXPECT_EQ(10, get<0>(t4));
Addz addz;
EXPECT_EQ(10, get<0>(t4));
DispatchToMethod(&addz, &Addz::DoAdd, t6);
EXPECT_EQ(15, get<0>(t4));
}
namespace {
struct CopyLogger {
CopyLogger() { ++TimesConstructed; }
CopyLogger(const CopyLogger& tocopy) { ++TimesConstructed; ++TimesCopied; }
~CopyLogger() { }
static int TimesCopied;
static int TimesConstructed;
};
void SomeLoggerMethRef(const CopyLogger& logy, const CopyLogger* ptr, bool* b) {
*b = &logy == ptr;
}
void SomeLoggerMethCopy(CopyLogger logy, const CopyLogger* ptr, bool* b) {
*b = &logy == ptr;
}
int CopyLogger::TimesCopied = 0;
int CopyLogger::TimesConstructed = 0;
} // namespace
TEST(TupleTest, Copying) {
CopyLogger logger;
EXPECT_EQ(0, CopyLogger::TimesCopied);
EXPECT_EQ(1, CopyLogger::TimesConstructed);
bool res = false;
// Creating the tuple should copy the class to store internally in the tuple.
base::Tuple<CopyLogger, CopyLogger*, bool*> tuple(logger, &logger, &res);
get<1>(tuple) = &get<0>(tuple);
EXPECT_EQ(2, CopyLogger::TimesConstructed);
EXPECT_EQ(1, CopyLogger::TimesCopied);
// Our internal Logger and the one passed to the function should be the same.
res = false;
DispatchToFunction(&SomeLoggerMethRef, tuple);
EXPECT_TRUE(res);
EXPECT_EQ(2, CopyLogger::TimesConstructed);
EXPECT_EQ(1, CopyLogger::TimesCopied);
// Now they should be different, since the function call will make a copy.
res = false;
DispatchToFunction(&SomeLoggerMethCopy, tuple);
EXPECT_FALSE(res);
EXPECT_EQ(3, CopyLogger::TimesConstructed);
EXPECT_EQ(2, CopyLogger::TimesCopied);
}
} // namespace base
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