35 lines
1.1 KiB
C++
35 lines
1.1 KiB
C++
#include <cstdint>
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#include <limits>
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#include <gtest/gtest.h>
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#include "common/math/support_functions.h"
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TEST(SupportFunctionsTest, CyclicAbsoluteDifferenceTreatsFullTurnsAsEquivalent)
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{
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constexpr std::int64_t period = 65536LL * 101LL;
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EXPECT_EQ(SupportFunctions::cyclicAbsoluteDifference(5254257, -1364879, period), 0);
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EXPECT_EQ(SupportFunctions::cyclicAbsoluteDifference(-10883488, -17502624, period), 0);
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}
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TEST(SupportFunctionsTest, CyclicAbsoluteDifferenceUsesShortestWrappedDistance)
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{
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constexpr std::int64_t period = 100;
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EXPECT_EQ(SupportFunctions::cyclicAbsoluteDifference(3, 97, period), 6);
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EXPECT_EQ(SupportFunctions::cyclicAbsoluteDifference(97, 3, period), 6);
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EXPECT_EQ(SupportFunctions::cyclicAbsoluteDifference(10, 40, period), 30);
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}
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TEST(SupportFunctionsTest, CyclicAbsoluteDifferenceHandlesInt32Range)
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{
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constexpr std::int64_t period = 65536LL * 101LL;
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const auto distance = SupportFunctions::cyclicAbsoluteDifference(
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std::numeric_limits<std::int32_t>::min(),
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std::numeric_limits<std::int32_t>::max(), period);
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EXPECT_GE(distance, 0);
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EXPECT_LE(distance, period / 2);
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}
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