READ_ME for writing Catch2 tests (example framework)

#include <catch2/catch_test_macros.hpp>
#include <catch2/matchers/catch_matchers_floating_point.hpp>

#include "corresponding_file.h"

using namespace sixte;

TEST_CASE("Test Name", "[test_name]") {

  /** test_requirements */

  /** test constructor */


  SECTION("Section Name") {
    /** test values: */
    auto test_value

    /** function to be tested: */
    value = some_test_function();

    /** test: */
    REQUIRE(value == test_value);
    REQUIRE_THAT(value, Catch::Matchers::WithinAbs(test_value, 1e-9));
  }
}
