polynomial_parser_tester.hpp

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#ifndef POLYNOMIAL_PARSER_TESTER_HPP
#define POLYNOMIAL_PARSER_TESTER_HPP
 
#include <gtest/gtest.h>
 
#include "ROOT/function_parser.hpp"
 
class PolynomialParserTester : public ::testing::Test {
  public:
    void testParseTokenAsPolyTerm(const std::string& input, const std::function<double(double)>& expected) {
        std::function<double(double)> result;
        bool success = PolynomialParser::parseTokenAsPolyTerm(input, result);
        EXPECT_TRUE(success);
 
        // Test the resulting function at a few sample points
        for (double x : {-2.0, -1.0, 0.0, 1.0, 2.0}) {
            double expected_value = expected(x);
            double result_value = result(x);
            EXPECT_DOUBLE_EQ(result_value, expected_value);
        }
    }
 
    void testParse(const std::string& input, const std::function<double(double)>& expected) {
        PolynomialParser parser(input);
        std::function<double(double)> result = parser.parse();
        // Test the resulting function at a few sample points
        for (double x : {-2.0, -1.0, 0.0, 1.0, 2.0}) {
            double expected_value = expected(x);
            double result_value = result(x);
            EXPECT_DOUBLE_EQ(result_value, expected_value);
        }
    }
};
 
#endif  // POLYNOMIAL_PARSER_TESTER_HPP