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- // Copyright 2014 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 <vector>
- #include "butil/scoped_generic.h"
- #include <gtest/gtest.h>
- namespace butil {
- namespace {
- struct IntTraits {
- IntTraits(std::vector<int>* freed) : freed_ints(freed) {}
- static int InvalidValue() {
- return -1;
- }
- void Free(int value) {
- freed_ints->push_back(value);
- }
- std::vector<int>* freed_ints;
- };
- typedef ScopedGeneric<int, IntTraits> ScopedInt;
- } // namespace
- TEST(ScopedGenericTest, ScopedGeneric) {
- std::vector<int> values_freed;
- IntTraits traits(&values_freed);
- // Invalid case, delete should not be called.
- {
- ScopedInt a(IntTraits::InvalidValue(), traits);
- }
- EXPECT_TRUE(values_freed.empty());
- // Simple deleting case.
- static const int kFirst = 0;
- {
- ScopedInt a(kFirst, traits);
- }
- ASSERT_EQ(1u, values_freed.size());
- ASSERT_EQ(kFirst, values_freed[0]);
- values_freed.clear();
- // Release should return the right value and leave the object empty.
- {
- ScopedInt a(kFirst, traits);
- EXPECT_EQ(kFirst, a.release());
- ScopedInt b(IntTraits::InvalidValue(), traits);
- EXPECT_EQ(IntTraits::InvalidValue(), b.release());
- }
- ASSERT_TRUE(values_freed.empty());
- // Reset should free the old value, then the new one should go away when
- // it goes out of scope.
- static const int kSecond = 1;
- {
- ScopedInt b(kFirst, traits);
- b.reset(kSecond);
- ASSERT_EQ(1u, values_freed.size());
- ASSERT_EQ(kFirst, values_freed[0]);
- }
- ASSERT_EQ(2u, values_freed.size());
- ASSERT_EQ(kSecond, values_freed[1]);
- values_freed.clear();
- // Swap.
- {
- ScopedInt a(kFirst, traits);
- ScopedInt b(kSecond, traits);
- a.swap(b);
- EXPECT_TRUE(values_freed.empty()); // Nothing should be freed.
- EXPECT_EQ(kSecond, a.get());
- EXPECT_EQ(kFirst, b.get());
- }
- // Values should be deleted in the opposite order.
- ASSERT_EQ(2u, values_freed.size());
- EXPECT_EQ(kFirst, values_freed[0]);
- EXPECT_EQ(kSecond, values_freed[1]);
- values_freed.clear();
- // Pass.
- {
- ScopedInt a(kFirst, traits);
- ScopedInt b(a.Pass());
- EXPECT_TRUE(values_freed.empty()); // Nothing should be freed.
- ASSERT_EQ(IntTraits::InvalidValue(), a.get());
- ASSERT_EQ(kFirst, b.get());
- }
- ASSERT_EQ(1u, values_freed.size());
- ASSERT_EQ(kFirst, values_freed[0]);
- }
- TEST(ScopedGenericTest, Operators) {
- std::vector<int> values_freed;
- IntTraits traits(&values_freed);
- static const int kFirst = 0;
- static const int kSecond = 1;
- {
- ScopedInt a(kFirst, traits);
- EXPECT_TRUE(a == kFirst);
- EXPECT_FALSE(a != kFirst);
- EXPECT_FALSE(a == kSecond);
- EXPECT_TRUE(a != kSecond);
- EXPECT_TRUE(kFirst == a);
- EXPECT_FALSE(kFirst != a);
- EXPECT_FALSE(kSecond == a);
- EXPECT_TRUE(kSecond != a);
- }
- // is_valid().
- {
- ScopedInt a(kFirst, traits);
- EXPECT_TRUE(a.is_valid());
- a.reset();
- EXPECT_FALSE(a.is_valid());
- }
- }
- // Cheesy manual "no compile" test for manually validating changes.
- #if 0
- TEST(ScopedGenericTest, NoCompile) {
- // Assignment shouldn't work.
- /*{
- ScopedInt a(kFirst, traits);
- ScopedInt b(a);
- }*/
- // Comparison shouldn't work.
- /*{
- ScopedInt a(kFirst, traits);
- ScopedInt b(kFirst, traits);
- if (a == b) {
- }
- }*/
- // Implicit conversion to bool shouldn't work.
- /*{
- ScopedInt a(kFirst, traits);
- bool result = a;
- }*/
- }
- #endif
- } // namespace butil
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