tests/intrusive_shared_ptr_src/assign.nullptr.cpp

   1 //
   2 // Tests for
   3 //  intrusive_shared_ptr& operator=(std::nullptr_t);
   4 //
   5
   6 #include <libkern/c++/intrusive_shared_ptr.h>
   7 #include <darwintest.h>
   8 #include "test_policy.h"
   9
  10 struct T {
  11         int i;
  12 };
  13
  14 template <typename T>
  15 static void
  16 tests()
  17 {
  18         T obj{3};
  19
  20         // Assign nullptr to non-null
  21         {
  22                 tracked_shared_ptr<T> ptr(&obj, libkern::retain);
  23                 tracking_policy::reset();
  24                 tracked_shared_ptr<T>& ref = (ptr = nullptr);
  25                 CHECK(tracking_policy::releases == 1);
  26                 CHECK(tracking_policy::retains == 0);
  27                 CHECK(&ref == &ptr);
  28                 CHECK(ptr.get() == nullptr);
  29         }
  30
  31         // Assign nullptr to null
  32         {
  33                 tracked_shared_ptr<T> ptr = nullptr;
  34                 tracking_policy::reset();
  35                 tracked_shared_ptr<T>& ref = (ptr = nullptr);
  36                 CHECK(tracking_policy::releases == 0);
  37                 CHECK(tracking_policy::retains == 0);
  38                 CHECK(&ref == &ptr);
  39                 CHECK(ptr.get() == nullptr);
  40         }
  41 }
  42
  43 T_DECL(assign_nullptr, "intrusive_shared_ptr.assign.nullptr") {
  44         tests<T>();
  45         tests<T const>();
  46 }