Add simple tests

tests/CMakeLists.txt

@@ -0,0 +1,18 @@
+cmake_minimum_required(VERSION 3.14)
+project(advanced-scene-switcher-tests)
+
+get_target_property(ADVSS_SOURCE_DIR advanced-scene-switcher-lib SOURCE_DIR)
+add_executable(${PROJECT_NAME})
+target_compile_definitions(${PROJECT_NAME} PRIVATE UNIT_TEST)
+target_compile_features(${PROJECT_NAME} PRIVATE cxx_std_17)
+target_sources(${PROJECT_NAME}
+               PRIVATE tests.cpp ${ADVSS_SOURCE_DIR}/src/utils/math-helpers.cpp)
+target_include_directories(
+  ${PROJECT_NAME}
+  PRIVATE "${ADVSS_SOURCE_DIR}/src" "${ADVSS_SOURCE_DIR}/src/legacy"
+          "${ADVSS_SOURCE_DIR}/src/macro-core" "${ADVSS_SOURCE_DIR}/src/utils"
+          "${ADVSS_SOURCE_DIR}/forms")
+install(TARGETS advanced-scene-switcher-lib
+        DESTINATION ${CMAKE_CURRENT_BINARY_DIR})
+
+enable_testing()

tests/tests.cpp

@@ -0,0 +1,71 @@
+#define CATCH_CONFIG_MAIN
+#include "catch.hpp"
+
+#include <math-helpers.hpp>
+
+TEST_CASE("Expressions are evaluated successfully", "[math-helpers]")
+{
+	auto expressionResult = EvalMathExpression("1");
+	auto *doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr != nullptr);
+	REQUIRE(*doubleValuePtr == 1.0);
+
+	expressionResult = EvalMathExpression("1 + 2");
+	doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr != nullptr);
+	REQUIRE(*doubleValuePtr == 3.0);
+
+	expressionResult = EvalMathExpression("1 + 2 * 3");
+	doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr != nullptr);
+	REQUIRE(*doubleValuePtr == 7.0);
+
+	expressionResult = EvalMathExpression("(1 + 2) * 3");
+	doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr != nullptr);
+	REQUIRE(*doubleValuePtr == 9.0);
+
+	expressionResult =
+		EvalMathExpression("cos(abs(1 - sqrt(10 - 2 * 3)) -1)");
+	doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr != nullptr);
+	REQUIRE(*doubleValuePtr == 1.0);
+}
+
+TEST_CASE("Invalid expressions are not evaluated", "[math-helpers]")
+{
+	auto expressionResult = EvalMathExpression("");
+	auto *doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr == nullptr);
+
+	expressionResult = EvalMathExpression(")");
+	doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr == nullptr);
+
+	expressionResult = EvalMathExpression("(");
+	doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr == nullptr);
+
+	expressionResult = EvalMathExpression("()");
+	doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr == nullptr);
+
+	expressionResult = EvalMathExpression("1 + 2)");
+	doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr == nullptr);
+
+	expressionResult = EvalMathExpression("1 + 2 * asdf");
+	doubleValuePtr = std::get_if<double>(&expressionResult);
+
+	REQUIRE(doubleValuePtr == nullptr);
+}