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/*
* Copyright (c) 2021 The WebRTC project authors. All Rights Reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "net/dcsctp/common/math.h"
#include "test/gmock.h"
namespace dcsctp {
namespace {
TEST(MathUtilTest, CanRoundUpTo4) {
// Signed numbers
EXPECT_EQ(RoundUpTo4(static_cast<int>(-5)), -4);
EXPECT_EQ(RoundUpTo4(static_cast<int>(-4)), -4);
EXPECT_EQ(RoundUpTo4(static_cast<int>(-3)), 0);
EXPECT_EQ(RoundUpTo4(static_cast<int>(-2)), 0);
EXPECT_EQ(RoundUpTo4(static_cast<int>(-1)), 0);
EXPECT_EQ(RoundUpTo4(static_cast<int>(0)), 0);
EXPECT_EQ(RoundUpTo4(static_cast<int>(1)), 4);
EXPECT_EQ(RoundUpTo4(static_cast<int>(2)), 4);
EXPECT_EQ(RoundUpTo4(static_cast<int>(3)), 4);
EXPECT_EQ(RoundUpTo4(static_cast<int>(4)), 4);
EXPECT_EQ(RoundUpTo4(static_cast<int>(5)), 8);
EXPECT_EQ(RoundUpTo4(static_cast<int>(6)), 8);
EXPECT_EQ(RoundUpTo4(static_cast<int>(7)), 8);
EXPECT_EQ(RoundUpTo4(static_cast<int>(8)), 8);
EXPECT_EQ(RoundUpTo4(static_cast<int64_t>(10000000000)), 10000000000);
EXPECT_EQ(RoundUpTo4(static_cast<int64_t>(10000000001)), 10000000004);
// Unsigned numbers
EXPECT_EQ(RoundUpTo4(static_cast<unsigned int>(0)), 0u);
EXPECT_EQ(RoundUpTo4(static_cast<unsigned int>(1)), 4u);
EXPECT_EQ(RoundUpTo4(static_cast<unsigned int>(2)), 4u);
EXPECT_EQ(RoundUpTo4(static_cast<unsigned int>(3)), 4u);
EXPECT_EQ(RoundUpTo4(static_cast<unsigned int>(4)), 4u);
EXPECT_EQ(RoundUpTo4(static_cast<unsigned int>(5)), 8u);
EXPECT_EQ(RoundUpTo4(static_cast<unsigned int>(6)), 8u);
EXPECT_EQ(RoundUpTo4(static_cast<unsigned int>(7)), 8u);
EXPECT_EQ(RoundUpTo4(static_cast<unsigned int>(8)), 8u);
EXPECT_EQ(RoundUpTo4(static_cast<uint64_t>(10000000000)), 10000000000u);
EXPECT_EQ(RoundUpTo4(static_cast<uint64_t>(10000000001)), 10000000004u);
}
TEST(MathUtilTest, CanRoundDownTo4) {
// Signed numbers
EXPECT_EQ(RoundDownTo4(static_cast<int>(-5)), -8);
EXPECT_EQ(RoundDownTo4(static_cast<int>(-4)), -4);
EXPECT_EQ(RoundDownTo4(static_cast<int>(-3)), -4);
EXPECT_EQ(RoundDownTo4(static_cast<int>(-2)), -4);
EXPECT_EQ(RoundDownTo4(static_cast<int>(-1)), -4);
EXPECT_EQ(RoundDownTo4(static_cast<int>(0)), 0);
EXPECT_EQ(RoundDownTo4(static_cast<int>(1)), 0);
EXPECT_EQ(RoundDownTo4(static_cast<int>(2)), 0);
EXPECT_EQ(RoundDownTo4(static_cast<int>(3)), 0);
EXPECT_EQ(RoundDownTo4(static_cast<int>(4)), 4);
EXPECT_EQ(RoundDownTo4(static_cast<int>(5)), 4);
EXPECT_EQ(RoundDownTo4(static_cast<int>(6)), 4);
EXPECT_EQ(RoundDownTo4(static_cast<int>(7)), 4);
EXPECT_EQ(RoundDownTo4(static_cast<int>(8)), 8);
EXPECT_EQ(RoundDownTo4(static_cast<int64_t>(10000000000)), 10000000000);
EXPECT_EQ(RoundDownTo4(static_cast<int64_t>(10000000001)), 10000000000);
// Unsigned numbers
EXPECT_EQ(RoundDownTo4(static_cast<unsigned int>(0)), 0u);
EXPECT_EQ(RoundDownTo4(static_cast<unsigned int>(1)), 0u);
EXPECT_EQ(RoundDownTo4(static_cast<unsigned int>(2)), 0u);
EXPECT_EQ(RoundDownTo4(static_cast<unsigned int>(3)), 0u);
EXPECT_EQ(RoundDownTo4(static_cast<unsigned int>(4)), 4u);
EXPECT_EQ(RoundDownTo4(static_cast<unsigned int>(5)), 4u);
EXPECT_EQ(RoundDownTo4(static_cast<unsigned int>(6)), 4u);
EXPECT_EQ(RoundDownTo4(static_cast<unsigned int>(7)), 4u);
EXPECT_EQ(RoundDownTo4(static_cast<unsigned int>(8)), 8u);
EXPECT_EQ(RoundDownTo4(static_cast<uint64_t>(10000000000)), 10000000000u);
EXPECT_EQ(RoundDownTo4(static_cast<uint64_t>(10000000001)), 10000000000u);
}
TEST(MathUtilTest, IsDivisibleBy4) {
// Signed numbers
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(-4)), true);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(-3)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(-2)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(-1)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(0)), true);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(1)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(2)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(3)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(4)), true);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(5)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(6)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(7)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<int>(8)), true);
EXPECT_EQ(IsDivisibleBy4(static_cast<int64_t>(10000000000)), true);
EXPECT_EQ(IsDivisibleBy4(static_cast<int64_t>(10000000001)), false);
// Unsigned numbers
EXPECT_EQ(IsDivisibleBy4(static_cast<unsigned int>(0)), true);
EXPECT_EQ(IsDivisibleBy4(static_cast<unsigned int>(1)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<unsigned int>(2)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<unsigned int>(3)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<unsigned int>(4)), true);
EXPECT_EQ(IsDivisibleBy4(static_cast<unsigned int>(5)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<unsigned int>(6)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<unsigned int>(7)), false);
EXPECT_EQ(IsDivisibleBy4(static_cast<unsigned int>(8)), true);
EXPECT_EQ(IsDivisibleBy4(static_cast<uint64_t>(10000000000)), true);
EXPECT_EQ(IsDivisibleBy4(static_cast<uint64_t>(10000000001)), false);
}
} // namespace
} // namespace dcsctp
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