xnu-7195.50.7.100.1.tar.gz

[apple/xnu.git] / tests / bounded_ptr_src / arith.inc_dec.cpp

diff --git a/tests/bounded_ptr_src/arith.inc_dec.cpp b/tests/bounded_ptr_src/arith.inc_dec.cpp
new file mode 100644 (file)
index 0000000..cb32fd6
--- /dev/null
+++ b/tests/bounded_ptr_src/arith.inc_dec.cpp
@@ -0,0 +1,147 @@
+//
+// Tests for
+//  bounded_ptr& operator++();
+//  bounded_ptr operator++(int);
+//  bounded_ptr& operator--();
+//  bounded_ptr operator--(int);
+//
+
+#include <libkern/c++/bounded_ptr.h>
+#include <array>
+#include <darwintest.h>
+#include <darwintest_utils.h>
+#include "test_utils.h"
+
+#define _assert(...) T_ASSERT_TRUE((__VA_ARGS__), # __VA_ARGS__)
+
+struct T {
+       int i;
+};
+
+template <typename T, typename QualT>
+static void
+tests()
+{
+       std::array<T, 5> array = {T{0}, T{1}, T{2}, T{3}, T{4}};
+
+       {
+               // Test pre-increment and pre-decrement
+               test_bounded_ptr<QualT> ptr(array.begin(), array.begin(), array.end());
+               _assert(&*ptr == &array[0]);
+
+               {
+                       auto& ref = ++ptr;
+                       _assert(&ref == &ptr);
+                       _assert(&*ptr == &array[1]);
+               }
+
+               {
+                       auto& ref = ++ptr;
+                       _assert(&ref == &ptr);
+                       _assert(&*ptr == &array[2]);
+               }
+               {
+                       auto& ref = ++ptr;
+                       _assert(&ref == &ptr);
+                       _assert(&*ptr == &array[3]);
+               }
+               {
+                       auto& ref = ++ptr;
+                       _assert(&ref == &ptr);
+                       _assert(&*ptr == &array[4]);
+               }
+               {
+                       auto& ref = ++ptr;
+                       _assert(&ref == &ptr);
+                       // ptr is now one-past-last
+               }
+               {
+                       auto& ref = --ptr;
+                       _assert(&ref == &ptr);
+                       _assert(&*ptr == &array[4]);
+               }
+               {
+                       auto& ref = --ptr;
+                       _assert(&ref == &ptr);
+                       _assert(&*ptr == &array[3]);
+               }
+               {
+                       auto& ref = --ptr;
+                       _assert(&ref == &ptr);
+                       _assert(&*ptr == &array[2]);
+               }
+               {
+                       auto& ref = --ptr;
+                       _assert(&ref == &ptr);
+                       _assert(&*ptr == &array[1]);
+               }
+               {
+                       auto& ref = --ptr;
+                       _assert(&ref == &ptr);
+                       _assert(&*ptr == &array[0]);
+               }
+       }
+       {
+               // Test post-increment and post-decrement
+               test_bounded_ptr<QualT> ptr(array.begin(), array.begin(), array.end());
+               _assert(&*ptr == &array[0]);
+
+               {
+                       auto prev = ptr++;
+                       _assert(&*prev == &array[0]);
+                       _assert(&*ptr == &array[1]);
+               }
+               {
+                       auto prev = ptr++;
+                       _assert(&*prev == &array[1]);
+                       _assert(&*ptr == &array[2]);
+               }
+               {
+                       auto prev = ptr++;
+                       _assert(&*prev == &array[2]);
+                       _assert(&*ptr == &array[3]);
+               }
+               {
+                       auto prev = ptr++;
+                       _assert(&*prev == &array[3]);
+                       _assert(&*ptr == &array[4]);
+               }
+               {
+                       auto prev = ptr++;
+                       _assert(&*prev == &array[4]);
+                       _assert(ptr == array.end());
+               }
+               {
+                       auto prev = ptr--;
+                       _assert(prev == array.end());
+                       _assert(&*ptr == &array[4]);
+               }
+               {
+                       auto prev = ptr--;
+                       _assert(&*prev == &array[4]);
+                       _assert(&*ptr == &array[3]);
+               }
+               {
+                       auto prev = ptr--;
+                       _assert(&*prev == &array[3]);
+                       _assert(&*ptr == &array[2]);
+               }
+               {
+                       auto prev = ptr--;
+                       _assert(&*prev == &array[2]);
+                       _assert(&*ptr == &array[1]);
+               }
+               {
+                       auto prev = ptr--;
+                       _assert(&*prev == &array[1]);
+                       _assert(&*ptr == &array[0]);
+               }
+       }
+}
+
+T_DECL(arith_inc_dec, "bounded_ptr.arith.inc_dec") {
+       tests<T, T>();
+       tests<T, T const>();
+       tests<T, T volatile>();
+       tests<T, T const volatile>();
+}