libs/units/test/test_trig.cpp

   1 // Boost.Units - A C++ library for zero-overhead dimensional analysis and
   2 // unit/quantity manipulation and conversion
   3 //
   4 // Copyright (C) 2009 Steven Watanabe
   5 //
   6 // Distributed under the Boost Software License, Version 1.0. (See
   7 // accompanying file LICENSE_1_0.txt or copy at
   8 // http://www.boost.org/LICENSE_1_0.txt)
   9
  10 /**
  11 \file
  12
  13 \brief test_trig.cpp
  14
  15 \details
  16 Test trigonometric functions.
  17
  18 Output:
  19 @verbatim
  20 @endverbatim
  21 **/
  22
  23 #include <cmath>
  24 #include <boost/units/cmath.hpp>
  25 #include <boost/units/systems/si/plane_angle.hpp>
  26 #include <boost/units/systems/si/length.hpp>
  27 #include <boost/units/systems/si/dimensionless.hpp>
  28 #include <boost/units/systems/angle/degrees.hpp>
  29
  30 #define BOOST_TEST_MAIN
  31 #include <boost/test/unit_test.hpp>
  32
  33 using boost::units::si::radians;
  34 using boost::units::si::si_dimensionless;
  35 using boost::units::degree::degrees;
  36 BOOST_UNITS_STATIC_CONSTANT(degree_dimensionless, boost::units::degree::dimensionless);
  37 using boost::units::si::meters;
  38 BOOST_UNITS_STATIC_CONSTANT(heterogeneous_dimensionless, boost::units::reduce_unit<boost::units::si::dimensionless>::type);
  39
  40 BOOST_AUTO_TEST_CASE(test_sin) {
  41     BOOST_CHECK_EQUAL(boost::units::sin(2.0 * radians), std::sin(2.0) * si_dimensionless);
  42     BOOST_CHECK_CLOSE_FRACTION(static_cast<double>(boost::units::sin(15.0 * degrees)), 0.2588, 0.0004);
  43 }
  44
  45 BOOST_AUTO_TEST_CASE(test_cos) {
  46     BOOST_CHECK_EQUAL(boost::units::cos(2.0 * radians), std::cos(2.0) * si_dimensionless);
  47     BOOST_CHECK_CLOSE_FRACTION(static_cast<double>(boost::units::cos(75.0 * degrees)), 0.2588, 0.0004);
  48 }
  49
  50 BOOST_AUTO_TEST_CASE(test_tan) {
  51     BOOST_CHECK_EQUAL(boost::units::tan(2.0 * radians), std::tan(2.0) * si_dimensionless);
  52     BOOST_CHECK_CLOSE_FRACTION(static_cast<double>(boost::units::tan(45.0 * degrees)), 1.0, 0.0001);
  53 }
  54
  55 BOOST_AUTO_TEST_CASE(test_asin) {
  56     BOOST_CHECK_EQUAL(boost::units::asin(0.2 * si_dimensionless), std::asin(0.2) * radians);
  57     BOOST_CHECK_CLOSE_FRACTION(boost::units::asin(0.5 * degree_dimensionless).value(), 30.0, 0.0001);
  58     BOOST_CHECK_EQUAL(boost::units::asin(0.2 * heterogeneous_dimensionless).value(), std::asin(0.2));
  59 }
  60
  61 BOOST_AUTO_TEST_CASE(test_acos) {
  62     BOOST_CHECK_EQUAL(boost::units::acos(0.2 * si_dimensionless), std::acos(0.2) * radians);
  63     BOOST_CHECK_CLOSE_FRACTION(boost::units::acos(0.5 * degree_dimensionless).value(), 60.0, 0.0001);
  64     BOOST_CHECK_EQUAL(boost::units::acos(0.2 * heterogeneous_dimensionless).value(), std::acos(0.2));
  65 }
  66
  67 BOOST_AUTO_TEST_CASE(test_atan) {
  68     BOOST_CHECK_EQUAL(boost::units::atan(0.2 * si_dimensionless), std::atan(0.2) * radians);
  69     BOOST_CHECK_CLOSE_FRACTION(boost::units::atan(1.0 * degree_dimensionless).value(), 45.0, 0.0001);
  70     BOOST_CHECK_EQUAL(boost::units::atan(0.2 * heterogeneous_dimensionless).value(), std::atan(0.2));
  71 }
  72
  73 BOOST_AUTO_TEST_CASE(test_atan2) {
  74     BOOST_CHECK_EQUAL(boost::units::atan2(0.2 * si_dimensionless, 0.3 * si_dimensionless), std::atan2(0.2, 0.3) * radians);
  75     BOOST_CHECK_EQUAL(boost::units::atan2(0.2 * meters, 0.3 * meters), std::atan2(0.2, 0.3) * radians);
  76     BOOST_CHECK_CLOSE_FRACTION(boost::units::atan2(0.8660*degree_dimensionless,0.5*degree_dimensionless).value(), 60., 0.0002);
  77     BOOST_CHECK_EQUAL(boost::units::atan2(0.2 * heterogeneous_dimensionless, 0.3 * heterogeneous_dimensionless).value(), std::atan2(0.2, 0.3));
  78 }