1 // Boost.Units - A C++ library for zero-overhead dimensional analysis and
2 // unit/quantity manipulation and conversion
3 //
4 // Copyright (C) 2003-2008 Matthias Christian Schabel
5 // Copyright (C) 2007-2008 Steven Watanabe
6 //
7 // Distributed under the Boost Software License, Version 1.0. (See
8 // accompanying file LICENSE_1_0.txt or copy at
9 // http://www.boost.org/LICENSE_1_0.txt)
10
11 /**
12 \file
13
14 \brief test_scaled_conversion.cpp
15
16 \details
17 Test unit scaling
18
19 Output:
20 @verbatim
21 @endverbatim
22 **/
23
24 #define BOOST_TEST_MAIN
25
26 #include <boost/units/systems/si/prefixes.hpp>
27 #include <boost/units/systems/si/time.hpp>
28 #include <boost/units/quantity.hpp>
29 #include <boost/units/io.hpp>
30
31 #include <sstream>
32
33 #include <boost/test/unit_test.hpp>
34 #include <boost/test/floating_point_comparison.hpp>
35
36 namespace bu = boost::units;
37 namespace si = boost::units::si;
38
BOOST_AUTO_TEST_CASE(test_scaled_to_plain)39 BOOST_AUTO_TEST_CASE(test_scaled_to_plain) {
40 bu::quantity<si::time> s1 = 12.5 * si::seconds;
41 bu::quantity<si::time> s2(si::nano * s1);
42 BOOST_CHECK_CLOSE_FRACTION(1e-9 * s1.value(), s2.value(), 0.000000001);
43 }
44
BOOST_AUTO_TEST_CASE(test_plain_to_scaled)45 BOOST_AUTO_TEST_CASE(test_plain_to_scaled) {
46 bu::quantity<si::time> s1 = 12.5 * si::seconds;
47 typedef bu::multiply_typeof_helper<si::nano_type, si::time>::type time_unit;
48 bu::quantity<time_unit> s2(s1);
49 BOOST_CHECK_CLOSE_FRACTION(1e9 * s1.value(), s2.value(), 0.000000001);
50 }
51
BOOST_AUTO_TEST_CASE(test_scaled_to_scaled)52 BOOST_AUTO_TEST_CASE(test_scaled_to_scaled) {
53 typedef bu::multiply_typeof_helper<si::mega_type, si::time>::type mega_time_unit;
54 typedef bu::multiply_typeof_helper<si::micro_type, si::time>::type micro_time_unit;
55 bu::quantity<mega_time_unit> s1(12.5 * si::seconds);
56 bu::quantity<micro_time_unit> s2(s1);
57 BOOST_CHECK_CLOSE_FRACTION(1e12 * s1.value(), s2.value(), 0.000000001);
58 }
59
BOOST_AUTO_TEST_CASE(test_conversion_factor)60 BOOST_AUTO_TEST_CASE(test_conversion_factor) {
61 BOOST_CHECK_CLOSE_FRACTION(conversion_factor(si::nano*si::seconds, si::seconds), 1e-9, 0.000000001);
62 BOOST_CHECK_CLOSE_FRACTION(conversion_factor(si::seconds, si::nano*si::seconds), 1e9, 0.000000001);
63 BOOST_CHECK_CLOSE_FRACTION(conversion_factor(si::mega*si::seconds, si::micro*si::seconds), 1e12, 0.000000001);
64 }
65
BOOST_AUTO_TEST_CASE(test_output)66 BOOST_AUTO_TEST_CASE(test_output) {
67 std::stringstream stream;
68 stream << si::nano * 12.5 * si::seconds;
69 BOOST_CHECK_EQUAL(stream.str(), "12.5 ns");
70 }
71
BOOST_AUTO_TEST_CASE(test_output_name)72 BOOST_AUTO_TEST_CASE(test_output_name) {
73 std::stringstream stream;
74 stream << bu::name_format << si::nano * 12.5 * si::seconds;
75 BOOST_CHECK_EQUAL(stream.str(), "12.5 nanosecond");
76 }
77