no_destructor_test.cc raw

   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(); }
  48