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112 lines
2.9 KiB
C
112 lines
2.9 KiB
C
/* Self tests for scoped_restore for GDB, the GNU debugger.
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Copyright (C) 2017-2018 Free Software Foundation, Inc.
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This file is part of GDB.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 3 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program. If not, see <http://www.gnu.org/licenses/>. */
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#include "defs.h"
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#include "selftest.h"
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#include "common/scoped_restore.h"
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namespace selftests {
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namespace scoped_restore_tests {
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struct Base {};
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struct Derived : Base {};
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static int global;
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/* Check that we can return a scoped_restore from a function. Below
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we'll make sure this does the right thing. */
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static scoped_restore_tmpl<int>
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make_scoped_restore_global (int value)
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{
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return make_scoped_restore (&global, value);
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}
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static void
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run_tests ()
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{
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/* Test that single-argument make_scoped_restore restores the
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original value on scope exit. */
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{
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int integer = 0;
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{
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scoped_restore restore = make_scoped_restore (&integer);
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SELF_CHECK (integer == 0);
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integer = 1;
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}
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SELF_CHECK (integer == 0);
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}
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/* Same, with two-argument make_scoped_restore. */
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{
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int integer = 0;
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{
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scoped_restore restore = make_scoped_restore (&integer, 1);
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SELF_CHECK (integer == 1);
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}
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SELF_CHECK (integer == 0);
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}
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/* Test releasing a scoped_restore. */
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{
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int integer = 0;
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{
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scoped_restore restore = make_scoped_restore (&integer, 1);
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SELF_CHECK (integer == 1);
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restore.release ();
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}
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/* The overridden value should persist. */
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SELF_CHECK (integer == 1);
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}
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/* Test creating a scoped_restore with a value of a type convertible
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to T. */
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{
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Base *base = nullptr;
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Derived derived;
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{
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scoped_restore restore = make_scoped_restore (&base, &derived);
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SELF_CHECK (base == &derived);
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}
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SELF_CHECK (base == nullptr);
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}
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/* Test calling a function that returns a scoped restore. Makes
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sure that if the compiler emits a call to the copy ctor, that we
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still do the right thing. */
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{
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{
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SELF_CHECK (global == 0);
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scoped_restore restore = make_scoped_restore_global (1);
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SELF_CHECK (global == 1);
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}
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SELF_CHECK (global == 0);
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}
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}
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} /* namespace scoped_restore_tests */
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} /* namespace selftests */
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void
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_initialize_scoped_restore_selftests ()
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{
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selftests::register_test ("scoped_restore",
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selftests::scoped_restore_tests::run_tests);
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}
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