mirror of
https://github.com/RGBCube/serenity
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964d2e0dd0
Problem: - `MACAddress` class is not usable in a compile-time context. - `__builtin_memcpy` is not constexpr in gcc. Solution: - Decorate functions with `constexpr` keyword. - Use default constructors and destructors. - Change `__builtin_memcpy` to a hand-written `for` loop and let the compiler's optimizer take care of it. - Add tests to ensure compile-time capabilities.
99 lines
2.9 KiB
C++
99 lines
2.9 KiB
C++
/*
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* Copyright (c) 2020, the SerenityOS developers.
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions are met:
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*
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* 1. Redistributions of source code must retain the above copyright notice, this
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* list of conditions and the following disclaimer.
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*
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* 2. Redistributions in binary form must reproduce the above copyright notice,
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* this list of conditions and the following disclaimer in the documentation
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* and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
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* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE
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* DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR
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* SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER
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* CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY,
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* OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <AK/TestSuite.h>
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#include <AK/MACAddress.h>
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#include <AK/Types.h>
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TEST_CASE(should_default_construct)
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{
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constexpr MACAddress sut {};
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static_assert(sut.is_zero());
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EXPECT(sut.is_zero());
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}
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TEST_CASE(should_braces_construct)
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{
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constexpr MACAddress sut { 1, 2, 3, 4, 5, 6 };
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static_assert(!sut.is_zero());
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EXPECT(!sut.is_zero());
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}
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TEST_CASE(should_construct_from_c_array)
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{
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constexpr u8 addr[6] = { 1, 2, 3, 4, 5, 6 };
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constexpr MACAddress sut(addr);
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static_assert(!sut.is_zero());
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EXPECT(!sut.is_zero());
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}
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TEST_CASE(should_construct_from_6_octets)
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{
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constexpr MACAddress sut(1, 2, 3, 4, 5, 6);
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static_assert(!sut.is_zero());
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EXPECT(!sut.is_zero());
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}
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TEST_CASE(should_provide_access_to_octet_by_index)
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{
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constexpr auto is_all_expected = [](auto& sut) {
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for (auto i = 0u; i < sizeof(MACAddress); ++i) {
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if (sut[i] != i + 1) {
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return false;
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}
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}
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return true;
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};
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constexpr MACAddress sut(1, 2, 3, 4, 5, 6);
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static_assert(is_all_expected(sut));
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for (auto i = 0u; i < sizeof(MACAddress); ++i) {
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EXPECT_EQ(i + 1, sut[i]);
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}
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}
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TEST_CASE(should_equality_compare)
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{
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constexpr MACAddress a(1, 2, 3, 4, 5, 6);
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constexpr MACAddress b(1, 2, 3, 42, 5, 6);
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static_assert(a == a);
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static_assert(a != b);
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EXPECT(a == a);
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EXPECT(a != b);
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}
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TEST_CASE(should_string_format)
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{
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MACAddress sut(1, 2, 3, 4, 5, 6);
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EXPECT_EQ("01:02:03:04:05:06", sut.to_string());
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}
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TEST_MAIN(MACAddress)
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