1// Boost.Geometry (aka GGL, Generic Geometry Library)
2// Unit Test
3
4// Copyright (c) 2015, Oracle and/or its affiliates.
5
6// Contributed and/or modified by Adam Wulkiewicz, on behalf of Oracle
7
8// Licensed under the Boost Software License version 1.0.
9// http://www.boost.org/users/license.html
10
11#ifndef BOOST_TEST_MODULE
12#define BOOST_TEST_MODULE test_math_abs
13#endif
14
15#include <cmath>
16#include <iostream>
17
18#include <boost/test/included/unit_test.hpp>
19
20#include <boost/config.hpp>
21
22#include "number_types.hpp"
23
24// important: the include above must precede the include below,
25// otherwise the test will fail for the custom number type:
26// custom_with_global_sqrt
27
28#include <boost/geometry/util/math.hpp>
29#include <boost/geometry/algorithms/not_implemented.hpp>
30
31namespace bg = boost::geometry;
32namespace bgm = boost::geometry::math;
33
34template <typename T>
35bool eq(T const& l, T const& r)
36{
37 return !(l < r || r < l);
38}
39
40BOOST_AUTO_TEST_CASE( test_math_abs )
41{
42 {
43 float p1 = bgm::pi<float>();
44 double p2 = bgm::pi<double>();
45 long double p3 = bgm::pi<long double>();
46
47 BOOST_CHECK(bgm::abs(p1) == p1);
48 BOOST_CHECK(bgm::abs(p2) == p2);
49 BOOST_CHECK(bgm::abs(p3) == p3);
50
51 float n1 = -p1;
52 double n2 = -p2;
53 long double n3 = -p3;
54
55 BOOST_CHECK(bgm::abs(n1) == p1);
56 BOOST_CHECK(bgm::abs(n2) == p2);
57 BOOST_CHECK(bgm::abs(n3) == p3);
58 }
59
60 {
61 number_types::custom<double> p1(bgm::pi<double>());
62 number_types::custom_with_global_sqrt<double> p2(bgm::pi<double>());
63 custom_global<double> p3(bgm::pi<double>());
64 custom_raw<double> p4(bgm::pi<double>());
65
66 BOOST_CHECK(eq(bgm::abs(p1), p1));
67 BOOST_CHECK(eq(bgm::abs(p2), p2));
68 BOOST_CHECK(eq(bgm::abs(p3), p3));
69 BOOST_CHECK(eq(bgm::abs(p4), p4));
70
71 number_types::custom<double> n1 = -p1;
72 number_types::custom_with_global_sqrt<double> n2 = -p2;
73 custom_global<double> n3 = -p3;
74 custom_raw<double> n4 = -p4;
75
76 BOOST_CHECK(eq(bgm::abs(n1), p1));
77 BOOST_CHECK(eq(bgm::abs(n2), p2));
78 BOOST_CHECK(eq(bgm::abs(n3), p3));
79 BOOST_CHECK(eq(bgm::abs(n4), p4));
80 }
81}
82
83

source code of boost/libs/geometry/test/util/math_abs.cpp