Source

`stdlib/tests/math_test.cpp`

2// Original work; see ACKNOWLEDGMENTS.md for the open-source ideas we build upon.

3#include "math.hpp"

5#include <gtest/gtest.h>

7namespace m = cheatah::math;

9TEST(CheatahMath, Constants) {

10 EXPECT_NEAR(m::pi, 3.14159265, 1e-7);

11 EXPECT_NEAR(m::e, 2.71828182, 1e-7);

12 EXPECT_NEAR(m::tau, 2.0 * m::pi, 1e-12);

13 EXPECT_TRUE(m::isinf(m::inf));

14 EXPECT_TRUE(m::isnan(m::nan));

15}

17TEST(CheatahMath, BuiltinLikeOps) {

18 EXPECT_EQ(m::abs(-7), 7);

19 EXPECT_EQ(m::min(3, 9, 1, 5), 1);

20 EXPECT_EQ(m::max(3, 9, 1, 5), 9);

21 EXPECT_DOUBLE_EQ(m::pow(2, 10), 1024.0);

22}

24TEST(CheatahMath, ScalarFunctions) {

25 EXPECT_DOUBLE_EQ(m::sqrt(144.0), 12.0);

26 EXPECT_DOUBLE_EQ(m::floor(2.7), 2.0);

27 EXPECT_DOUBLE_EQ(m::ceil(2.1), 3.0);

28 EXPECT_DOUBLE_EQ(m::round(2.5), 3.0);

29 EXPECT_NEAR(m::log2(8.0), 3.0, 1e-12);

30 EXPECT_NEAR(m::hypot(3.0, 4.0), 5.0, 1e-12);

31 EXPECT_NEAR(m::degrees(m::pi), 180.0, 1e-9);

32}

34TEST(CheatahMath, TranscendentalAndRounding) {

35 EXPECT_DOUBLE_EQ(m::cbrt(27.0), 3.0);

36 EXPECT_DOUBLE_EQ(m::fabs(-3.5), 3.5);

37 EXPECT_DOUBLE_EQ(m::trunc(2.9), 2.0);

38 EXPECT_DOUBLE_EQ(m::trunc(-2.9), -2.0);

39 EXPECT_NEAR(m::exp(0.0), 1.0, 1e-12);

40 EXPECT_NEAR(m::exp(1.0), m::e, 1e-12);

41 EXPECT_NEAR(m::log(m::e), 1.0, 1e-12);

42 EXPECT_NEAR(m::log10(1000.0), 3.0, 1e-12);

43 EXPECT_NEAR(m::fmod(7.0, 3.0), 1.0, 1e-12);

44 EXPECT_DOUBLE_EQ(m::copysign(3.0, -1.0), -3.0);

45 EXPECT_NEAR(m::radians(180.0), m::pi, 1e-12);

46}

48TEST(CheatahMath, Trigonometry) {

49 EXPECT_NEAR(m::sin(0.0), 0.0, 1e-12);

50 EXPECT_NEAR(m::sin(m::pi / 2), 1.0, 1e-12);

51 EXPECT_NEAR(m::cos(0.0), 1.0, 1e-12);

52 EXPECT_NEAR(m::tan(0.0), 0.0, 1e-12);

53 EXPECT_NEAR(m::asin(1.0), m::pi / 2, 1e-12);

54 EXPECT_NEAR(m::acos(1.0), 0.0, 1e-12);

55 EXPECT_NEAR(m::atan(1.0), m::pi / 4, 1e-12);

56 EXPECT_NEAR(m::atan2(1.0, 1.0), m::pi / 4, 1e-12);

57}

59TEST(CheatahMath, IsFiniteIsNanIsInf) {

60 EXPECT_TRUE(m::isfinite(1.0));

61 EXPECT_FALSE(m::isfinite(m::inf));

62 EXPECT_FALSE(m::isfinite(m::nan));

63 EXPECT_TRUE(m::isinf(m::inf));

64 EXPECT_FALSE(m::isinf(1.0));

65 EXPECT_TRUE(m::isnan(m::nan));

66 EXPECT_FALSE(m::isnan(1.0));

67}

69TEST(CheatahMath, Integer) {

70 EXPECT_EQ(m::gcd(54, 24), 6);

71 EXPECT_EQ(m::factorial(5), 120);

72}