1// (C) Copyright Gennadiy Rozental 2001.
2// Distributed under the Boost Software License, Version 1.0.
3// (See accompanying file LICENSE_1_0.txt or copy at
4// http://www.boost.org/LICENSE_1_0.txt)
5
6// See http://www.boost.org/libs/test for the library home page.
7//
8/// @file
9/// Enhanced result for test predicate that include message explaining failure
10// ***************************************************************************
11
12#ifndef BOOST_TEST_PREDICATE_RESULT_HPP_012705GER
13#define BOOST_TEST_PREDICATE_RESULT_HPP_012705GER
14
15// Boost.Test
16#include <boost/test/utils/class_properties.hpp>
17#include <boost/test/utils/wrap_stringstream.hpp>
18#include <boost/test/utils/basic_cstring/basic_cstring.hpp>
19
20// Boost
21#include <boost/shared_ptr.hpp>
22#include <boost/detail/workaround.hpp>
23
24// STL
25#include <cstddef> // for std::size_t
26
27#include <boost/test/detail/suppress_warnings.hpp>
28
29//____________________________________________________________________________//
30
31namespace boost {
32namespace test_tools {
33
34// ************************************************************************** //
35// ************** assertion_result ************** //
36// ************************************************************************** //
37
38//!@brief Type used for storing the result of an assertion.
39class BOOST_TEST_DECL assertion_result {
40
41 //!@internal
42 typedef unit_test::const_string const_string;
43
44 //!@internal
45 struct dummy { void nonnull() {} };
46
47 //!@internal
48 typedef void (dummy::*safe_bool)();
49
50public:
51 // Constructor
52 assertion_result( bool pv_ )
53 : p_predicate_value( pv_ )
54 {}
55
56 template<typename BoolConvertable>
57 assertion_result( BoolConvertable const& pv_ ) : p_predicate_value( !!pv_ ) {}
58
59 // Access methods
60 bool operator!() const { return !p_predicate_value; }
61 void operator=( bool pv_ ) { p_predicate_value.value = pv_; }
62 operator safe_bool() const { return !!p_predicate_value ? &dummy::nonnull : 0; }
63
64 // Public properties
65 BOOST_READONLY_PROPERTY( bool, (assertion_result) ) p_predicate_value;
66
67 // Access methods
68 bool has_empty_message() const { return !m_message; }
69 wrap_stringstream& message()
70 {
71 if( !m_message )
72 m_message.reset( new wrap_stringstream );
73
74 return *m_message;
75 }
76 const_string message() const { return !m_message ? const_string() : const_string( m_message->str() ); }
77
78private:
79 // Data members
80 shared_ptr<wrap_stringstream> m_message;
81};
82
83typedef assertion_result predicate_result;
84
85} // namespace test_tools
86} // namespace boost
87
88#include <boost/test/detail/enable_warnings.hpp>
89
90#endif // BOOST_TEST_PREDICATE_RESULT_HPP_012705GER
91

source code of boost/boost/test/tools/assertion_result.hpp