libcruft-util/test/buffer/circular.cpp

44 lines
1.3 KiB
C++

/*
* This Source Code Form is subject to the terms of the Mozilla Public
* License, v. 2.0. If a copy of the MPL was not distributed with this
* file, You can obtain one at http://mozilla.org/MPL/2.0/.
*
* Copyright 2015 Danny Robson <danny@nerdcruft.net>
*/
#include "std.hpp"
#include "buffer/circular.hpp"
#include "tap.hpp"
#include <algorithm>
///////////////////////////////////////////////////////////////////////////////
int
main (void)
{
cruft::TAP::logger tap;
// provoke usage of the smallest size buffer we can get away with so we
// might detect caching issues or similar.
constexpr size_t CAPACITY = 1;
cruft::buffer::circular<u08> data (CAPACITY);
// zero fill to ensure our value setting tests don't accidentall succeed
std::fill_n (data.begin (), data.size () * 2, 0);
// sanity check we haven't accidentally mapped an empty region
tap.expect_neq (data.begin (), data.end (), "non-zero sized region");
// check a near overrun is replicated
data.end ()[0] = 1;
tap.expect_eq (data.begin ()[0], data.end ()[0], "near overrun is replicated");
// check a far overrun is replicated
data.end ()[data.size () - 1] = 2;
tap.expect_eq (data.begin ()[data.size () - 1],
data.end ()[data.size () - 1],
"far overrun is replicated");
return tap.status ();
}