add tests

Author: markaren

tests/math/CMakeLists.txt

@@ -5,6 +5,7 @@ add_test_executable(Color_test)
 add_test_executable(Cylindrical_test)
 add_test_executable(Euler_test)
 add_test_executable(Frustum_test)
+add_test_executable(MathUtils_test)
 add_test_executable(Sphere_test)
 add_test_executable(Spherical_test)
 add_test_executable(Triangle_test)

tests/math/MathUtils_test.cpp

@@ -0,0 +1,60 @@
+
+#include <catch2/catch_test_macros.hpp>
+#include <catch2/catch_approx.hpp>
+
+#include "threepp/math/MathUtils.hpp"
+
+#include <regex>
+
+using namespace threepp;
+
+TEST_CASE("genereteUUID") {
+
+    const auto uuid = math::generateUUID();
+    const std::regex uuidRegex("[A-Z0-9]{8}-[A-Z0-9]{4}-4[A-Z0-9]{3}-[A-Z0-9]{4}-[A-Z0-9]{12}", std::regex_constants::icase);
+
+    REQUIRE(std::regex_match(uuid, uuidRegex));
+}
+
+TEST_CASE("euclideanModulo") {
+    CHECK(std::isnan(math::euclideanModulo(6, 0)));
+    CHECK(math::euclideanModulo(6, 1) == Catch::Approx(0.));
+    CHECK(math::euclideanModulo(6, 2) == Catch::Approx(0.));
+    CHECK(math::euclideanModulo(6, 5) == Catch::Approx(1.));
+    CHECK(math::euclideanModulo(6, 6) == Catch::Approx(0.));
+    CHECK(math::euclideanModulo(6, 7) == Catch::Approx(6.));
+}
+
+TEST_CASE("mapLinear") {
+    // Value within range
+    CHECK(math::mapLinear(0.5, 0.0, 1.0, 0.0, 10.0) == Catch::Approx(5.0));
+
+    // Value equal to lower boundary
+    CHECK(math::mapLinear(0.0, 0.0, 1.0, 0.0, 10.0) == Catch::Approx(0.0));
+
+    // Value equal to upper boundary
+    CHECK(math::mapLinear(1.0, 0.0, 1.0, 0.0, 10.0) == Catch::Approx(10.0));
+}
+
+TEST_CASE("inverseLerp") {
+
+    // 50% Percentage
+    CHECK(math::inverseLerp(1.0, 2.0, 1.5) == Catch::Approx(0.5));
+    // 100% Percentage
+    CHECK(math::inverseLerp(1.0, 2.0, 2.0) == Catch::Approx(1.));
+    // 0% Percentage
+    CHECK(math::inverseLerp(1.0, 2.0, 1.0) == Catch::Approx(0.));
+    // 0% Percentage, no NaN
+    CHECK(math::inverseLerp(1.0, 1.0, 1.0) == Catch::Approx(0.));
+}
+
+TEST_CASE("lerp") {
+    // Value equal to lower boundary
+    CHECK(math::lerp(1.0, 2.0, 0.0) == Catch::Approx(1.0));
+
+    // Value equal to upper boundary
+    CHECK(math::lerp(1.0, 2.0, 1.0) == Catch::Approx(2.0));
+
+    // Value within range
+    CHECK(math::lerp(1.0, 2.0, 0.4) == Catch::Approx(1.4));
+}