ladybird/Tests/AK/TestNeverDestroyed.cpp
Andrew Kaster e1b8a2e517 Tests: Mark use-after-scope NeverDestroyed test NO_SANITIZE_ADDRESS
The should_not_destroy test case intentionally performs an invalid stack
access on a NeverDestroyed to confirm that the destructor for the held
type was not called.
2021-05-14 08:34:00 +01:00

80 lines
1.4 KiB
C++

/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#include <LibTest/TestCase.h>
#include <AK/NeverDestroyed.h>
#include <AK/StdLibExtras.h>
struct Counter {
Counter() = default;
~Counter() { ++num_destroys; }
Counter(const Counter&)
{
++num_copies;
}
Counter(Counter&&) { ++num_moves; }
int num_copies {};
int num_moves {};
int num_destroys {};
};
TEST_CASE(should_construct_by_copy)
{
Counter c {};
AK::NeverDestroyed<Counter> n { c };
EXPECT_EQ(1, n->num_copies);
EXPECT_EQ(0, n->num_moves);
}
TEST_CASE(should_construct_by_move)
{
Counter c {};
AK::NeverDestroyed<Counter> n { move(c) };
EXPECT_EQ(0, n->num_copies);
EXPECT_EQ(1, n->num_moves);
}
NO_SANITIZE_ADDRESS static void should_not_destroy()
{
Counter* c = nullptr;
{
AK::NeverDestroyed<Counter> n {};
// note: explicit stack-use-after-scope
c = &n.get();
}
EXPECT_EQ(0, c->num_destroys);
}
TEST_CASE(should_not_destroy)
{
should_not_destroy();
}
TEST_CASE(should_provide_dereference_operator)
{
AK::NeverDestroyed<Counter> n {};
EXPECT_EQ(0, n->num_destroys);
}
TEST_CASE(should_provide_indirection_operator)
{
AK::NeverDestroyed<Counter> n {};
EXPECT_EQ(0, (*n).num_destroys);
}
TEST_CASE(should_provide_basic_getter)
{
AK::NeverDestroyed<Counter> n {};
EXPECT_EQ(0, n.get().num_destroys);
}