1 // Copyright (c) 2006-2008 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #include "base/tuple.h" 6 7 #include <gtest/gtest.h> 8 9 #include "base/compiler_specific.h" 10 11 namespace base { 12 13 namespace { 14 15 void DoAdd(int a, int b, int c, int* res) { 16 *res = a + b + c; 17 } 18 19 struct Addy { 20 Addy() { } 21 void DoAdd(int a, int b, int c, int d, int* res) { 22 *res = a + b + c + d; 23 } 24 }; 25 26 struct Addz { 27 Addz() { } 28 void DoAdd(int a, int b, int c, int d, int e, int* res) { 29 *res = a + b + c + d + e; 30 } 31 }; 32 33 } // namespace 34 35 TEST(TupleTest, Basic) { 36 base::Tuple<> t0 = base::MakeTuple(); 37 ALLOW_UNUSED_LOCAL(t0); 38 base::Tuple<int> t1(1); 39 base::Tuple<int, const char*> t2 = 40 base::MakeTuple(1, static_cast<const char*>("wee")); 41 base::Tuple<int, int, int> t3(1, 2, 3); 42 base::Tuple<int, int, int, int*> t4(1, 2, 3, &get<0>(t1)); 43 base::Tuple<int, int, int, int, int*> t5(1, 2, 3, 4, &get<0>(t4)); 44 base::Tuple<int, int, int, int, int, int*> t6(1, 2, 3, 4, 5, &get<0>(t4)); 45 46 EXPECT_EQ(1, get<0>(t1)); 47 EXPECT_EQ(1, get<0>(t2)); 48 EXPECT_EQ(1, get<0>(t3)); 49 EXPECT_EQ(2, get<1>(t3)); 50 EXPECT_EQ(3, get<2>(t3)); 51 EXPECT_EQ(1, get<0>(t4)); 52 EXPECT_EQ(2, get<1>(t4)); 53 EXPECT_EQ(3, get<2>(t4)); 54 EXPECT_EQ(1, get<0>(t5)); 55 EXPECT_EQ(2, get<1>(t5)); 56 EXPECT_EQ(3, get<2>(t5)); 57 EXPECT_EQ(4, get<3>(t5)); 58 EXPECT_EQ(1, get<0>(t6)); 59 EXPECT_EQ(2, get<1>(t6)); 60 EXPECT_EQ(3, get<2>(t6)); 61 EXPECT_EQ(4, get<3>(t6)); 62 EXPECT_EQ(5, get<4>(t6)); 63 64 EXPECT_EQ(1, get<0>(t1)); 65 DispatchToFunction(&DoAdd, t4); 66 EXPECT_EQ(6, get<0>(t1)); 67 68 int res = 0; 69 DispatchToFunction(&DoAdd, base::MakeTuple(9, 8, 7, &res)); 70 EXPECT_EQ(24, res); 71 72 Addy addy; 73 EXPECT_EQ(1, get<0>(t4)); 74 DispatchToMethod(&addy, &Addy::DoAdd, t5); 75 EXPECT_EQ(10, get<0>(t4)); 76 77 Addz addz; 78 EXPECT_EQ(10, get<0>(t4)); 79 DispatchToMethod(&addz, &Addz::DoAdd, t6); 80 EXPECT_EQ(15, get<0>(t4)); 81 } 82 83 namespace { 84 85 struct CopyLogger { 86 CopyLogger() { ++TimesConstructed; } 87 CopyLogger(const CopyLogger& tocopy) { ++TimesConstructed; ++TimesCopied; } 88 ~CopyLogger() { } 89 90 static int TimesCopied; 91 static int TimesConstructed; 92 }; 93 94 void SomeLoggerMethRef(const CopyLogger& logy, const CopyLogger* ptr, bool* b) { 95 *b = &logy == ptr; 96 } 97 98 void SomeLoggerMethCopy(CopyLogger logy, const CopyLogger* ptr, bool* b) { 99 *b = &logy == ptr; 100 } 101 102 int CopyLogger::TimesCopied = 0; 103 int CopyLogger::TimesConstructed = 0; 104 105 } // namespace 106 107 TEST(TupleTest, Copying) { 108 CopyLogger logger; 109 EXPECT_EQ(0, CopyLogger::TimesCopied); 110 EXPECT_EQ(1, CopyLogger::TimesConstructed); 111 112 bool res = false; 113 114 // Creating the tuple should copy the class to store internally in the tuple. 115 base::Tuple<CopyLogger, CopyLogger*, bool*> tuple(logger, &logger, &res); 116 get<1>(tuple) = &get<0>(tuple); 117 EXPECT_EQ(2, CopyLogger::TimesConstructed); 118 EXPECT_EQ(1, CopyLogger::TimesCopied); 119 120 // Our internal Logger and the one passed to the function should be the same. 121 res = false; 122 DispatchToFunction(&SomeLoggerMethRef, tuple); 123 EXPECT_TRUE(res); 124 EXPECT_EQ(2, CopyLogger::TimesConstructed); 125 EXPECT_EQ(1, CopyLogger::TimesCopied); 126 127 // Now they should be different, since the function call will make a copy. 128 res = false; 129 DispatchToFunction(&SomeLoggerMethCopy, tuple); 130 EXPECT_FALSE(res); 131 EXPECT_EQ(3, CopyLogger::TimesConstructed); 132 EXPECT_EQ(2, CopyLogger::TimesCopied); 133 } 134 135 } // namespace base 136
