143 lines
3.8 KiB
C++
143 lines
3.8 KiB
C++
// Copyright (c) 2006-2008 The Chromium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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#include "base/tuple.h"
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#include "base/compiler_specific.h"
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#include "testing/gtest/include/gtest/gtest.h"
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namespace base {
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namespace {
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void DoAdd(int a, int b, int c, int* res) {
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*res = a + b + c;
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}
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struct Addy {
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Addy() { }
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void DoAdd(int a, int b, int c, int d, int* res) {
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*res = a + b + c + d;
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}
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};
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struct Addz {
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Addz() { }
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void DoAdd(int a, int b, int c, int d, int e, int* res) {
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*res = a + b + c + d + e;
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}
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};
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} // namespace
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TEST(TupleTest, Basic) {
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std::tuple<> t0 = std::make_tuple();
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ALLOW_UNUSED_LOCAL(t0);
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std::tuple<int> t1(1);
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std::tuple<int, const char*> t2 =
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std::make_tuple(1, static_cast<const char*>("wee"));
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ALLOW_UNUSED_LOCAL(t2);
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std::tuple<int, int, int> t3(1, 2, 3);
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std::tuple<int, int, int, int*> t4(1, 2, 3, &std::get<0>(t1));
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std::tuple<int, int, int, int, int*> t5(1, 2, 3, 4, &std::get<0>(t4));
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std::tuple<int, int, int, int, int, int*> t6(1, 2, 3, 4, 5, &std::get<0>(t4));
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EXPECT_EQ(1, std::get<0>(t1));
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DispatchToFunction(&DoAdd, t4);
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EXPECT_EQ(6, std::get<0>(t1));
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int res = 0;
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DispatchToFunction(&DoAdd, std::make_tuple(9, 8, 7, &res));
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EXPECT_EQ(24, res);
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Addy addy;
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EXPECT_EQ(1, std::get<0>(t4));
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DispatchToMethod(&addy, &Addy::DoAdd, t5);
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EXPECT_EQ(10, std::get<0>(t4));
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Addz addz;
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EXPECT_EQ(10, std::get<0>(t4));
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DispatchToMethod(&addz, &Addz::DoAdd, t6);
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EXPECT_EQ(15, std::get<0>(t4));
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}
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namespace {
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struct CopyLogger {
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CopyLogger() { ++TimesConstructed; }
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CopyLogger(const CopyLogger& tocopy) { ++TimesConstructed; ++TimesCopied; }
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~CopyLogger() { }
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static int TimesCopied;
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static int TimesConstructed;
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};
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void SomeLoggerMethRef(const CopyLogger& logy, const CopyLogger* ptr, bool* b) {
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*b = &logy == ptr;
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}
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void SomeLoggerMethCopy(CopyLogger logy, const CopyLogger* ptr, bool* b) {
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*b = &logy == ptr;
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}
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int CopyLogger::TimesCopied = 0;
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int CopyLogger::TimesConstructed = 0;
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} // namespace
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TEST(TupleTest, Copying) {
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CopyLogger logger;
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EXPECT_EQ(0, CopyLogger::TimesCopied);
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EXPECT_EQ(1, CopyLogger::TimesConstructed);
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bool res = false;
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// Creating the tuple should copy the class to store internally in the tuple.
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std::tuple<CopyLogger, CopyLogger*, bool*> tuple(logger, &logger, &res);
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std::get<1>(tuple) = &std::get<0>(tuple);
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EXPECT_EQ(2, CopyLogger::TimesConstructed);
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EXPECT_EQ(1, CopyLogger::TimesCopied);
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// Our internal Logger and the one passed to the function should be the same.
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res = false;
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DispatchToFunction(&SomeLoggerMethRef, tuple);
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EXPECT_TRUE(res);
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EXPECT_EQ(2, CopyLogger::TimesConstructed);
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EXPECT_EQ(1, CopyLogger::TimesCopied);
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// Now they should be different, since the function call will make a copy.
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res = false;
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DispatchToFunction(&SomeLoggerMethCopy, tuple);
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EXPECT_FALSE(res);
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EXPECT_EQ(3, CopyLogger::TimesConstructed);
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EXPECT_EQ(2, CopyLogger::TimesCopied);
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}
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TEST(TupleTest, Get) {
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int i = 1;
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int j = 2;
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std::tuple<int, int&, int&&> t(3, i, std::move(j));
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EXPECT_TRUE((std::is_same<int&, decltype(base::get<0>(t))>::value));
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EXPECT_EQ(3, base::get<0>(t));
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EXPECT_TRUE((std::is_same<int&, decltype(base::get<1>(t))>::value));
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EXPECT_EQ(1, base::get<1>(t));
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EXPECT_TRUE((std::is_same<int&, decltype(base::get<2>(t))>::value));
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EXPECT_EQ(2, base::get<2>(t));
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EXPECT_TRUE((std::is_same<int&&,
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decltype(base::get<0>(std::move(t)))>::value));
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EXPECT_EQ(3, base::get<0>(std::move(t)));
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EXPECT_TRUE((std::is_same<int&,
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decltype(base::get<1>(std::move(t)))>::value));
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EXPECT_EQ(1, base::get<1>(std::move(t)));
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EXPECT_TRUE((std::is_same<int&&,
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decltype(base::get<2>(std::move(t)))>::value));
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EXPECT_EQ(2, base::get<2>(std::move(t)));
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}
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} // namespace base
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