1  // Copyright (c) 2018 The LevelDB 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. See the AUTHORS file for names of contributors.
 4  
 5  #include <cstdint>
 6  #include <cstdlib>
 7  #include <utility>
 8  
 9  #include "util/no_destructor.h"
10  #include "util/testharness.h"
11  
12  namespace leveldb {
13  
14  namespace {
15  
16  struct DoNotDestruct {
17   public:
18    DoNotDestruct(uint32_t a, uint64_t b) : a(a), b(b) {}
19    ~DoNotDestruct() { std::abort(); }
20  
21    // Used to check constructor argument forwarding.
22    uint32_t a;
23    uint64_t b;
24  };
25  
26  constexpr const uint32_t kGoldenA = 0xdeadbeef;
27  constexpr const uint64_t kGoldenB = 0xaabbccddeeffaabb;
28  
29  }  // namespace
30  
31  class NoDestructorTest {};
32  
33  TEST(NoDestructorTest, StackInstance) {
34    NoDestructor<DoNotDestruct> instance(kGoldenA, kGoldenB);
35    ASSERT_EQ(kGoldenA, instance.get()->a);
36    ASSERT_EQ(kGoldenB, instance.get()->b);
37  }
38  
39  TEST(NoDestructorTest, StaticInstance) {
40    static NoDestructor<DoNotDestruct> instance(kGoldenA, kGoldenB);
41    ASSERT_EQ(kGoldenA, instance.get()->a);
42    ASSERT_EQ(kGoldenB, instance.get()->b);
43  }
44  
45  }  // namespace leveldb
46  
47  int main(int argc, char** argv) { return leveldb::test::RunAllTests(); }