tests/bounded_ptr_src/assign.nullptr.cpp

   1 //
   2 // Tests for
   3 //  bounded_ptr& operator=(std::nullptr_t);
   4 //
   5
   6 #include <cstddef>
   7 #include <libkern/c++/bounded_ptr.h>
   8 #include <darwintest.h>
   9 #include <darwintest_utils.h>
  10 #include "test_utils.h"
  11
  12 #define _assert(...) T_ASSERT_TRUE((__VA_ARGS__), # __VA_ARGS__)
  13
  14 struct T { };
  15
  16 template <typename T, typename TQual>
  17 static void
  18 tests()
  19 {
  20         T obj{};
  21
  22         // Assign from nullptr
  23         {
  24                 test_bounded_ptr<TQual> p(&obj, &obj, &obj + 1);
  25                 _assert(p != nullptr);
  26                 test_bounded_ptr<TQual>& ref = (p = nullptr);
  27                 _assert(&ref == &p);
  28                 _assert(p == nullptr);
  29         }
  30
  31         // Assign from NULL
  32         {
  33                 test_bounded_ptr<TQual> p(&obj, &obj, &obj + 1);
  34                 _assert(p != nullptr);
  35                 test_bounded_ptr<TQual>& ref = (p = NULL);
  36                 _assert(&ref == &p);
  37                 _assert(p == nullptr);
  38         }
  39
  40         // Assign from 0
  41         {
  42                 test_bounded_ptr<TQual> p(&obj, &obj, &obj + 1);
  43                 _assert(p != nullptr);
  44                 test_bounded_ptr<TQual>& ref = (p = 0);
  45                 _assert(&ref == &p);
  46                 _assert(p == nullptr);
  47         }
  48 }
  49
  50 T_DECL(assign_nullptr, "bounded_ptr.assign.nullptr") {
  51         tests<T, T>();
  52         tests<T, T const>();
  53         tests<T, T volatile>();
  54         tests<T, T const volatile>();
  55 }