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 #include "testing/gtest/include/gtest/gtest.h" 7 8 namespace { 9 10 void DoAdd(int a, int b, int c, int* res) { 11 *res = a + b + c; 12 } 13 14 struct Addy { 15 Addy() { } 16 void DoAdd(int a, int b, int c, int d, int* res) { 17 *res = a + b + c + d; 18 } 19 }; 20 21 struct Addz { 22 Addz() { } 23 void DoAdd(int a, int b, int c, int d, int e, int* res) { 24 *res = a + b + c + d + e; 25 } 26 }; 27 28 } // namespace 29 30 TEST(TupleTest, Basic) { 31 Tuple0 t0 = MakeTuple(); 32 Tuple1<int> t1(1); 33 Tuple2<int, const char*> t2 = MakeTuple(1, static_cast<const char*>("wee")); 34 Tuple3<int, int, int> t3(1, 2, 3); 35 Tuple4<int, int, int, int*> t4(1, 2, 3, &t1.a); 36 Tuple5<int, int, int, int, int*> t5(1, 2, 3, 4, &t4.a); 37 Tuple6<int, int, int, int, int, int*> t6(1, 2, 3, 4, 5, &t4.a); 38 39 EXPECT_EQ(1, t1.a); 40 EXPECT_EQ(1, t2.a); 41 EXPECT_EQ(1, t3.a); 42 EXPECT_EQ(2, t3.b); 43 EXPECT_EQ(3, t3.c); 44 EXPECT_EQ(1, t4.a); 45 EXPECT_EQ(2, t4.b); 46 EXPECT_EQ(3, t4.c); 47 EXPECT_EQ(1, t5.a); 48 EXPECT_EQ(2, t5.b); 49 EXPECT_EQ(3, t5.c); 50 EXPECT_EQ(4, t5.d); 51 EXPECT_EQ(1, t6.a); 52 EXPECT_EQ(2, t6.b); 53 EXPECT_EQ(3, t6.c); 54 EXPECT_EQ(4, t6.d); 55 EXPECT_EQ(5, t6.e); 56 57 EXPECT_EQ(1, t1.a); 58 DispatchToFunction(&DoAdd, t4); 59 EXPECT_EQ(6, t1.a); 60 61 int res = 0; 62 DispatchToFunction(&DoAdd, MakeTuple(9, 8, 7, &res)); 63 EXPECT_EQ(24, res); 64 65 Addy addy; 66 EXPECT_EQ(1, t4.a); 67 DispatchToMethod(&addy, &Addy::DoAdd, t5); 68 EXPECT_EQ(10, t4.a); 69 70 Addz addz; 71 EXPECT_EQ(10, t4.a); 72 DispatchToMethod(&addz, &Addz::DoAdd, t6); 73 EXPECT_EQ(15, t4.a); 74 } 75 76 namespace { 77 78 struct CopyLogger { 79 CopyLogger() { ++TimesConstructed; } 80 CopyLogger(const CopyLogger& tocopy) { ++TimesConstructed; ++TimesCopied; } 81 ~CopyLogger() { } 82 83 static int TimesCopied; 84 static int TimesConstructed; 85 }; 86 87 void SomeLoggerMethRef(const CopyLogger& logy, const CopyLogger* ptr, bool* b) { 88 *b = &logy == ptr; 89 } 90 91 void SomeLoggerMethCopy(CopyLogger logy, const CopyLogger* ptr, bool* b) { 92 *b = &logy == ptr; 93 } 94 95 int CopyLogger::TimesCopied = 0; 96 int CopyLogger::TimesConstructed = 0; 97 98 } // namespace 99 100 TEST(TupleTest, Copying) { 101 CopyLogger logger; 102 EXPECT_EQ(0, CopyLogger::TimesCopied); 103 EXPECT_EQ(1, CopyLogger::TimesConstructed); 104 105 bool res = false; 106 107 // Creating the tuple should copy the class to store internally in the tuple. 108 Tuple3<CopyLogger, CopyLogger*, bool*> tuple(logger, &logger, &res); 109 tuple.b = &tuple.a; 110 EXPECT_EQ(2, CopyLogger::TimesConstructed); 111 EXPECT_EQ(1, CopyLogger::TimesCopied); 112 113 // Our internal Logger and the one passed to the function should be the same. 114 res = false; 115 DispatchToFunction(&SomeLoggerMethRef, tuple); 116 EXPECT_TRUE(res); 117 EXPECT_EQ(2, CopyLogger::TimesConstructed); 118 EXPECT_EQ(1, CopyLogger::TimesCopied); 119 120 // Now they should be different, since the function call will make a copy. 121 res = false; 122 DispatchToFunction(&SomeLoggerMethCopy, tuple); 123 EXPECT_FALSE(res); 124 EXPECT_EQ(3, CopyLogger::TimesConstructed); 125 EXPECT_EQ(2, CopyLogger::TimesCopied); 126 } 127
