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| 1 // Copyright 2014 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 <vector> | |
| 6 | |
| 7 #include "base/scoped_generic.h" | |
| 8 #include "testing/gtest/include/gtest/gtest.h" | |
| 9 | |
| 10 namespace base { | |
| 11 | |
| 12 namespace { | |
| 13 | |
| 14 struct IntTraits { | |
| 15 IntTraits(std::vector<int>* freed) : freed_ints(freed) {} | |
| 16 | |
| 17 static int InvalidValue() { | |
| 18 return -1; | |
| 19 } | |
| 20 void Free(int value) { | |
| 21 freed_ints->push_back(value); | |
| 22 } | |
| 23 | |
| 24 std::vector<int>* freed_ints; | |
| 25 }; | |
| 26 | |
| 27 typedef ScopedGeneric<int, IntTraits> ScopedInt; | |
| 28 | |
| 29 } // namespace | |
| 30 | |
| 31 TEST(ScopedGenericTest, ScopedGeneric) { | |
| 32 std::vector<int> values_freed; | |
| 33 IntTraits traits(&values_freed); | |
| 34 | |
| 35 // Invalid case, delete should not be called. | |
| 36 { | |
| 37 ScopedInt a(IntTraits::InvalidValue(), traits); | |
| 38 } | |
| 39 EXPECT_TRUE(values_freed.empty()); | |
| 40 | |
| 41 // Simple deleting case. | |
| 42 static const int kFirst = 0; | |
| 43 { | |
| 44 ScopedInt a(kFirst, traits); | |
| 45 } | |
| 46 ASSERT_EQ(1u, values_freed.size()); | |
| 47 ASSERT_EQ(kFirst, values_freed[0]); | |
| 48 values_freed.clear(); | |
| 49 | |
| 50 // Release should return the right value and leave the object empty. | |
| 51 { | |
| 52 ScopedInt a(kFirst, traits); | |
| 53 EXPECT_EQ(kFirst, a.release()); | |
| 54 | |
| 55 ScopedInt b(IntTraits::InvalidValue(), traits); | |
| 56 EXPECT_EQ(IntTraits::InvalidValue(), b.release()); | |
| 57 } | |
| 58 ASSERT_TRUE(values_freed.empty()); | |
| 59 | |
| 60 // Reset should free the old value, then the new one should go away when | |
| 61 // it goes out of scope. | |
| 62 static const int kSecond = 1; | |
| 63 { | |
| 64 ScopedInt b(kFirst, traits); | |
| 65 b.reset(kSecond); | |
| 66 ASSERT_EQ(1u, values_freed.size()); | |
| 67 ASSERT_EQ(kFirst, values_freed[0]); | |
| 68 } | |
| 69 ASSERT_EQ(2u, values_freed.size()); | |
| 70 ASSERT_EQ(kSecond, values_freed[1]); | |
| 71 values_freed.clear(); | |
| 72 | |
| 73 // Swap. | |
| 74 { | |
| 75 ScopedInt a(kFirst, traits); | |
| 76 ScopedInt b(kSecond, traits); | |
| 77 a.swap(b); | |
| 78 EXPECT_TRUE(values_freed.empty()); // Nothing should be freed. | |
| 79 EXPECT_EQ(kSecond, a.get()); | |
| 80 EXPECT_EQ(kFirst, b.get()); | |
| 81 } | |
| 82 // Values should be deleted in the opposite order. | |
| 83 ASSERT_EQ(2u, values_freed.size()); | |
| 84 EXPECT_EQ(kFirst, values_freed[0]); | |
| 85 EXPECT_EQ(kSecond, values_freed[1]); | |
| 86 values_freed.clear(); | |
| 87 | |
| 88 // Pass constructor. | |
| 89 { | |
| 90 ScopedInt a(kFirst, traits); | |
| 91 ScopedInt b(a.Pass()); | |
| 92 EXPECT_TRUE(values_freed.empty()); // Nothing should be freed. | |
| 93 ASSERT_EQ(IntTraits::InvalidValue(), a.get()); | |
| 94 ASSERT_EQ(kFirst, b.get()); | |
| 95 } | |
| 96 | |
| 97 ASSERT_EQ(1u, values_freed.size()); | |
| 98 ASSERT_EQ(kFirst, values_freed[0]); | |
| 99 values_freed.clear(); | |
| 100 | |
| 101 // Pass assign. | |
| 102 { | |
| 103 ScopedInt a(kFirst, traits); | |
| 104 ScopedInt b(kSecond, traits); | |
| 105 b = a.Pass(); | |
| 106 ASSERT_EQ(1u, values_freed.size()); | |
| 107 EXPECT_EQ(kSecond, values_freed[0]); | |
| 108 ASSERT_EQ(IntTraits::InvalidValue(), a.get()); | |
| 109 ASSERT_EQ(kFirst, b.get()); | |
| 110 } | |
| 111 | |
| 112 ASSERT_EQ(2u, values_freed.size()); | |
| 113 EXPECT_EQ(kFirst, values_freed[1]); | |
| 114 values_freed.clear(); | |
| 115 } | |
| 116 | |
| 117 TEST(ScopedGenericTest, Operators) { | |
| 118 std::vector<int> values_freed; | |
| 119 IntTraits traits(&values_freed); | |
| 120 | |
| 121 static const int kFirst = 0; | |
| 122 static const int kSecond = 1; | |
| 123 { | |
| 124 ScopedInt a(kFirst, traits); | |
| 125 EXPECT_TRUE(a == kFirst); | |
| 126 EXPECT_FALSE(a != kFirst); | |
| 127 EXPECT_FALSE(a == kSecond); | |
| 128 EXPECT_TRUE(a != kSecond); | |
| 129 | |
| 130 EXPECT_TRUE(kFirst == a); | |
| 131 EXPECT_FALSE(kFirst != a); | |
| 132 EXPECT_FALSE(kSecond == a); | |
| 133 EXPECT_TRUE(kSecond != a); | |
| 134 } | |
| 135 | |
| 136 // is_valid(). | |
| 137 { | |
| 138 ScopedInt a(kFirst, traits); | |
| 139 EXPECT_TRUE(a.is_valid()); | |
| 140 a.reset(); | |
| 141 EXPECT_FALSE(a.is_valid()); | |
| 142 } | |
| 143 } | |
| 144 | |
| 145 // Cheesy manual "no compile" test for manually validating changes. | |
| 146 #if 0 | |
| 147 TEST(ScopedGenericTest, NoCompile) { | |
| 148 // Assignment shouldn't work. | |
| 149 /*{ | |
| 150 ScopedInt a(kFirst, traits); | |
| 151 ScopedInt b(a); | |
| 152 }*/ | |
| 153 | |
| 154 // Comparison shouldn't work. | |
| 155 /*{ | |
| 156 ScopedInt a(kFirst, traits); | |
| 157 ScopedInt b(kFirst, traits); | |
| 158 if (a == b) { | |
| 159 } | |
| 160 }*/ | |
| 161 | |
| 162 // Implicit conversion to bool shouldn't work. | |
| 163 /*{ | |
| 164 ScopedInt a(kFirst, traits); | |
| 165 bool result = a; | |
| 166 }*/ | |
| 167 } | |
| 168 #endif | |
| 169 | |
| 170 } // namespace base | |
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