xnu-7195.50.7.100.1.tar.gz

[apple/xnu.git] / tests / intrusive_shared_ptr_src / assign.nullptr.cpp

diff --git a/tests/intrusive_shared_ptr_src/assign.nullptr.cpp b/tests/intrusive_shared_ptr_src/assign.nullptr.cpp
new file mode 100644 (file)
index 0000000..55068d6
--- /dev/null
+++ b/tests/intrusive_shared_ptr_src/assign.nullptr.cpp
@@ -0,0 +1,46 @@
+//
+// Tests for
+//  intrusive_shared_ptr& operator=(std::nullptr_t);
+//
+
+#include <libkern/c++/intrusive_shared_ptr.h>
+#include <darwintest.h>
+#include "test_policy.h"
+
+struct T {
+       int i;
+};
+
+template <typename T>
+static void
+tests()
+{
+       T obj{3};
+
+       // Assign nullptr to non-null
+       {
+               tracked_shared_ptr<T> ptr(&obj, libkern::retain);
+               tracking_policy::reset();
+               tracked_shared_ptr<T>& ref = (ptr = nullptr);
+               CHECK(tracking_policy::releases == 1);
+               CHECK(tracking_policy::retains == 0);
+               CHECK(&ref == &ptr);
+               CHECK(ptr.get() == nullptr);
+       }
+
+       // Assign nullptr to null
+       {
+               tracked_shared_ptr<T> ptr = nullptr;
+               tracking_policy::reset();
+               tracked_shared_ptr<T>& ref = (ptr = nullptr);
+               CHECK(tracking_policy::releases == 0);
+               CHECK(tracking_policy::retains == 0);
+               CHECK(&ref == &ptr);
+               CHECK(ptr.get() == nullptr);
+       }
+}
+
+T_DECL(assign_nullptr, "intrusive_shared_ptr.assign.nullptr") {
+       tests<T>();
+       tests<T const>();
+}