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/* Self tests for scoped_restore for GDB, the GNU debugger.
Copyright (C) 2017-2019 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
GNU General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "gdbsupport/selftest.h"
#include "gdbsupport/scoped_restore.h"
namespace selftests {
namespace scoped_restore_tests {
struct Base {};
struct Derived : Base {};
static int global;
/* Check that we can return a scoped_restore from a function. Below
we'll make sure this does the right thing. */
static scoped_restore_tmpl<int>
make_scoped_restore_global (int value)
{
return make_scoped_restore (&global, value);
}
static void
run_tests ()
{
/* Test that single-argument make_scoped_restore restores the
original value on scope exit. */
{
int integer = 0;
{
scoped_restore restore = make_scoped_restore (&integer);
SELF_CHECK (integer == 0);
integer = 1;
}
SELF_CHECK (integer == 0);
}
/* Same, with two-argument make_scoped_restore. */
{
int integer = 0;
{
scoped_restore restore = make_scoped_restore (&integer, 1);
SELF_CHECK (integer == 1);
}
SELF_CHECK (integer == 0);
}
/* Test releasing a scoped_restore. */
{
int integer = 0;
{
scoped_restore restore = make_scoped_restore (&integer, 1);
SELF_CHECK (integer == 1);
restore.release ();
}
/* The overridden value should persist. */
SELF_CHECK (integer == 1);
}
/* Test creating a scoped_restore with a value of a type convertible
to T. */
{
Base *base = nullptr;
Derived derived;
{
scoped_restore restore = make_scoped_restore (&base, &derived);
SELF_CHECK (base == &derived);
}
SELF_CHECK (base == nullptr);
}
/* Test calling a function that returns a scoped restore. Makes
sure that if the compiler emits a call to the copy ctor, that we
still do the right thing. */
{
{
SELF_CHECK (global == 0);
scoped_restore restore = make_scoped_restore_global (1);
SELF_CHECK (global == 1);
}
SELF_CHECK (global == 0);
}
}
} /* namespace scoped_restore_tests */
} /* namespace selftests */
void
_initialize_scoped_restore_selftests ()
{
selftests::register_test ("scoped_restore",
selftests::scoped_restore_tests::run_tests);
}
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