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/**
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* @file test_math.cpp
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* @brief math 模块单元测试（Math 命名空间）
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*
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*
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* @version 1.0
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* @author CodeBuddy
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* @date 26-09-03
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*
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* @note
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*/
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#include <gtest/gtest.h>
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#include "math/dl_math.h"
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#include "math/dl_random.h"
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#include "math/dl_texture_pack.h"
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TEST(MathTest, Pow)
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{
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EXPECT_EQ(dl::Math::Pow(2, 10), 1024);
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EXPECT_EQ(dl::Math::Pow64(2, 10), 1024ull);
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EXPECT_EQ(dl::Math::Pow32(2, 10), 1024u);
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}
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TEST(MathTest, SubU)
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{
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EXPECT_EQ(dl::Math::SubU(5u, 3u), 2u);
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EXPECT_EQ(dl::Math::SubU(3u, 5u), 0u);
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}
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TEST(MathTest, DisU)
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{
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EXPECT_EQ(dl::Math::DisU(3u, 5u), 2u);
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EXPECT_EQ(dl::Math::DisU(5u, 3u), 2u);
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}
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TEST(MathTest, IsPow2)
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{
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EXPECT_TRUE(dl::Math::IsPow2(8));
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EXPECT_TRUE(dl::Math::IsPow2(1));
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EXPECT_FALSE(dl::Math::IsPow2(0));
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EXPECT_FALSE(dl::Math::IsPow2(6));
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}
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TEST(MathTest, AlignPow2)
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{
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EXPECT_EQ(dl::Math::AlignPow2(5u, 4u), 8u);
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EXPECT_EQ(dl::Math::AlignPow2(8u, 4u), 8u);
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EXPECT_EQ(dl::Math::AlignPow2(1u, 4u), 4u);
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// 非 2 的幂返回 0
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EXPECT_EQ(dl::Math::AlignPow2(5u, 3u), 0u);
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}
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TEST(MathTest, DistancePow2)
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{
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dl::Position a{ 0.0f, 0.0f };
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dl::Position b{ 3.0f, 4.0f };
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EXPECT_FLOAT_EQ(dl::Math::DistancePow2(a, b), 25.0f);
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EXPECT_FLOAT_EQ(dl::Math::Distance(b - a), 5.0f);
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}
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TEST(MathTest, DotProduct)
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{
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dl::Position a{ 1.0f, 2.0f };
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dl::Position b{ 3.0f, 4.0f };
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EXPECT_FLOAT_EQ(dl::Math::DotProduct(a, b), 11.0f); // 1*3 + 2*4
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}
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TEST(MathTest, CrossProduct)
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{
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dl::Position2 a{ 1.0f, 0.0f };
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dl::Position2 b{ 0.0f, 1.0f };
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EXPECT_FLOAT_EQ(dl::Math::CrossProduct(a, b), 1.0f);
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}
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TEST(MathTest, IsLeapYear)
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{
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EXPECT_TRUE(dl::Math::IsLeapYear(2000));
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EXPECT_TRUE(dl::Math::IsLeapYear(2024));
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EXPECT_FALSE(dl::Math::IsLeapYear(1900));
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EXPECT_FALSE(dl::Math::IsLeapYear(2023));
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}
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TEST(MathTest, GetMouthDayNum)
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{
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EXPECT_EQ(dl::Math::GetMouthDayNum(2024, 2), 29); // 闰年二月
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EXPECT_EQ(dl::Math::GetMouthDayNum(2023, 2), 28); // 平年二月
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EXPECT_EQ(dl::Math::GetMouthDayNum(2024, 1), 31);
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EXPECT_EQ(dl::Math::GetMouthDayNum(2024, 4), 30);
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}
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//------------------------------算法------------------------------
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TEST(MathTest, Clamp)
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{
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EXPECT_EQ(dl::clamp(5, 1, 3), 3); // 上界
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EXPECT_EQ(dl::clamp(0, 1, 3), 1); // 下界
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EXPECT_EQ(dl::clamp(2, 1, 3), 2); // 中间
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EXPECT_FLOAT_EQ(dl::clamp(1.5f, 0.0f, 1.0f), 1.0f);
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EXPECT_FLOAT_EQ(dl::clamp(-0.5f, 0.0f, 1.0f), 0.0f);
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}
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TEST(MathTest, Saturate)
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{
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EXPECT_FLOAT_EQ(dl::saturate(0.5f), 0.5f);
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EXPECT_FLOAT_EQ(dl::saturate(2.0f), 1.0f);
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EXPECT_FLOAT_EQ(dl::saturate(-1.0f), 0.0f);
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EXPECT_TRUE(dl::is_saturate(0.5f));
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EXPECT_FALSE(dl::is_saturate(1.5f));
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}
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TEST(MathTest, Sign)
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{
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EXPECT_EQ(dl::sign(5), 1);
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EXPECT_EQ(dl::sign(-5), -1);
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EXPECT_EQ(dl::sign(0), 0);
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}
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TEST(MathTest, Cross3)
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{
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dl::Position3 a{ 1.0f, 0.0f, 0.0f };
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dl::Position3 b{ 0.0f, 1.0f, 0.0f };
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auto c = dl::cross(a, b);
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EXPECT_FLOAT_EQ(c[0], 0.0f);
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EXPECT_FLOAT_EQ(c[1], 0.0f);
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EXPECT_FLOAT_EQ(c[2], 1.0f);
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}
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TEST(MathTest, InsertPerNum)
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{
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EXPECT_EQ(dl::insert_per_num(std::string("1234567890"), ',', 3), "123,456,789,0");
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EXPECT_EQ(dl::r_insert_per_num(std::string("123456789"), ',', 3), "123,456,789");
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}
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TEST(MathTest, MakeSequence)
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{
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std::vector<int> v;
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dl::make_sequence<std::vector<int>, int>(v, { {0, 3}, {5, 7} });
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ASSERT_EQ(v.size(), 5u);
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EXPECT_EQ(v[0], 0);
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EXPECT_EQ(v[1], 1);
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EXPECT_EQ(v[2], 2);
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EXPECT_EQ(v[3], 5);
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EXPECT_EQ(v[4], 6);
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}
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//------------------------------Random------------------------------
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TEST(RandomTest, SetSeed)
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{
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dl::Random::SetSeed(42);
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int a = dl::Random::Int(0, 100);
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dl::Random::SetSeed(42);
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int b = dl::Random::Int(0, 100);
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EXPECT_EQ(a, b); // 同种子结果一致
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}
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TEST(RandomTest, IntRange)
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{
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dl::Random::SetSeed(1);
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for (int i = 0; i < 100; ++i)
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{
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int v = dl::Random::Int(10, 20);
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EXPECT_GE(v, 10);
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EXPECT_LE(v, 20);
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}
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}
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TEST(RandomTest, FloatRange)
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{
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dl::Random::SetSeed(1);
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for (int i = 0; i < 100; ++i)
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{
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float v = dl::Random::Float(0.0f, 1.0f);
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EXPECT_GE(v, 0.0f);
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EXPECT_LT(v, 1.0f);
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}
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}
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TEST(RandomTest, Percent)
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{
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dl::Random::SetSeed(1);
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EXPECT_TRUE(dl::Random::Percent(100));
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EXPECT_FALSE(dl::Random::Percent(0));
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}
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TEST(RandomTest, Select)
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{
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std::vector<int> v = { 1, 2, 3, 4, 5 };
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dl::Random::SetSeed(1);
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int sel = dl::Random::Select(v);
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EXPECT_GE(sel, 1);
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EXPECT_LE(sel, 5);
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}
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//------------------------------TexturePack------------------------------
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TEST(TexturePackTest, Dynamic)
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{
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dl::TexturePack::Dynamic<2> pack;
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pack.Reset({ 100, 100 });
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dl::RectU r1;
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EXPECT_TRUE(pack.Add({ 30, 30 }, r1));
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EXPECT_EQ(r1[0], 0u);
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EXPECT_EQ(r1[1], 0u);
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EXPECT_EQ(r1[2], 30u);
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EXPECT_EQ(r1[3], 30u);
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dl::RectU r2;
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EXPECT_TRUE(pack.Add({ 30, 30 }, r2));
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EXPECT_EQ(r2[0], 30u); // 同一行，x 偏移
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EXPECT_EQ(r2[1], 0u);
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dl::RectU r3;
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EXPECT_TRUE(pack.Add({ 30, 30 }, r3));
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EXPECT_EQ(r3[0], 60u);
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EXPECT_EQ(r3[1], 0u);
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dl::RectU r4;
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EXPECT_TRUE(pack.Add({ 30, 30 }, r4));
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EXPECT_EQ(r4[0], 0u); // 换行
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EXPECT_EQ(r4[1], 30u);
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}
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TEST(TexturePackTest, Static)
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{
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dl::TexturePack::Static pack;
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pack.SetSize({ 100, 100 });
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std::list<dl::Size> boxes = { {50, 50}, {50, 50}, {100, 50} };
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std::vector<dl::PointU> results;
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pack.Calc(boxes,
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[](const dl::Size& s) { return s; },
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[&](const dl::Size& s, const dl::PointU& lt) { results.push_back(lt); });
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// 3 个箱子总面积 10000 = 100*100，能全部放下
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EXPECT_TRUE(boxes.empty());
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EXPECT_EQ(results.size(), 3u);
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}
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