79 lines
2.8 KiB
C++
79 lines
2.8 KiB
C++
/*
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* This file is part of the Colobot: Gold Edition source code
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* Copyright (C) 2001-2021, Daniel Roux, EPSITEC SA & TerranovaTeam
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* http://epsitec.ch; http://colobot.info; http://github.com/colobot
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*
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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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*
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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.
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* See the GNU General Public License for more details.
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*
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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://gnu.org/licenses
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*/
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#include "common/timeutils.h"
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#include <gtest/gtest.h>
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namespace TimeUtils
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{
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TEST(TimeUtilsExactDiffTest, ExactDiff)
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{
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auto epoch = TimeStamp{};
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EXPECT_EQ(ExactDiff(epoch, epoch), 0);
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auto duration = std::chrono::microseconds{123456789L};
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auto before = std::chrono::high_resolution_clock::now();
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auto after = before + duration;
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EXPECT_EQ(ExactDiff(before, after), std::chrono::nanoseconds{duration}.count());
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EXPECT_EQ(ExactDiff(after, before), -std::chrono::nanoseconds{duration}.count());
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}
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constexpr auto TIMESTAMP_START = TimeStamp{std::chrono::nanoseconds{300}};
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constexpr auto TIMESTAMP_MID = TimeStamp{std::chrono::nanoseconds{600}};
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constexpr auto TIMESTAMP_END = TimeStamp{std::chrono::nanoseconds{900}};
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constexpr auto LERP_PARAM_ZERO = 0.0f;
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constexpr auto LERP_PARAM_HALF = 0.5f;
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constexpr auto LERP_PARAM_ONE = 1.0f;
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TEST(TimeUtilsLerpTest, LerpReturnsStartWhenLerpParameterIsZero)
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{
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EXPECT_EQ(TIMESTAMP_START, Lerp(TIMESTAMP_START, TIMESTAMP_END, LERP_PARAM_ZERO));
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}
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TEST(TimeUtilsLerpTest, LerpReturnsEndWhenLerpParameterIsOne)
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{
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EXPECT_EQ(TIMESTAMP_END, Lerp(TIMESTAMP_START, TIMESTAMP_END, LERP_PARAM_ONE));
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}
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TEST(TimeUtilsLerpTest, LerpReturnsValueBetweenStartAndEndWhenLerpParameterIsBetweenZeroAndOne)
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{
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EXPECT_EQ(TIMESTAMP_MID, Lerp(TIMESTAMP_START, TIMESTAMP_END, LERP_PARAM_HALF));
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}
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TEST(TimeUtilsLerpTest, LerpIsMonotonic)
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{
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constexpr auto deltaLerpParam = 0.1f;
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auto earlierTimeStamp = Lerp(TIMESTAMP_START, TIMESTAMP_END, LERP_PARAM_HALF - deltaLerpParam);
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auto laterTimeStamp = Lerp(TIMESTAMP_START, TIMESTAMP_END, LERP_PARAM_HALF + deltaLerpParam);
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EXPECT_TRUE(earlierTimeStamp < laterTimeStamp);
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}
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TEST(TimeUtilsLerpTest, LerpIsConsistent)
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{
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auto timeStamp = TIMESTAMP_START;
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EXPECT_EQ(timeStamp, Lerp(timeStamp, timeStamp, LERP_PARAM_ZERO));
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EXPECT_EQ(timeStamp, Lerp(timeStamp, timeStamp, LERP_PARAM_HALF));
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EXPECT_EQ(timeStamp, Lerp(timeStamp, timeStamp, LERP_PARAM_ONE));
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}
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} // namespace TimeUtils
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