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lest_cpp03.hpp
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// Copyright 2013-2018 by Martin Moene
//
// lest is based on ideas by Kevlin Henney, see video at
// http://skillsmatter.com/podcast/agile-testing/kevlin-henney-rethinking-unit-testing-in-c-plus-plus
//
// Distributed under the Boost Software License, Version 1.0. (See accompanying
// file LICENSE.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
#ifndef LEST_LEST_HPP_INCLUDED
#define LEST_LEST_HPP_INCLUDED
#include <algorithm>
#include <iomanip>
#include <iostream>
#include <iterator>
#include <limits>
#include <sstream>
#include <stdexcept>
#include <set>
#include <string>
#include <utility>
#include <vector>
#include <cctype>
#include <cmath>
#include <cstddef>
#include <cstdlib>
#include <ctime>
#define lest_MAJOR 1
#define lest_MINOR 35
#define lest_PATCH 1
#define lest_VERSION lest_STRINGIFY(lest_MAJOR) "." lest_STRINGIFY(lest_MINOR) "." lest_STRINGIFY(lest_PATCH)
#ifndef lest_FEATURE_COLOURISE
# define lest_FEATURE_COLOURISE 0
#endif
#ifndef lest_FEATURE_LITERAL_SUFFIX
# define lest_FEATURE_LITERAL_SUFFIX 0
#endif
#ifndef lest_FEATURE_REGEX_SEARCH
# define lest_FEATURE_REGEX_SEARCH 0
#endif
#ifndef lest_FEATURE_TIME
# define lest_FEATURE_TIME 1
#endif
#ifndef lest_FEATURE_TIME_PRECISION
#define lest_FEATURE_TIME_PRECISION 0
#endif
#ifdef _WIN32
# define lest_PLATFORM_IS_WINDOWS 1
#else
# define lest_PLATFORM_IS_WINDOWS 0
#endif
#if lest_FEATURE_REGEX_SEARCH
# include <regex>
#endif
#if lest_FEATURE_TIME
# if lest_PLATFORM_IS_WINDOWS
# include <iomanip>
# include <Windows.h>
# else
# include <iomanip>
# include <sys/time.h>
# endif
#endif
// Compiler warning suppression:
#if defined (__clang__)
# pragma clang diagnostic ignored "-Waggregate-return"
# pragma clang diagnostic ignored "-Woverloaded-shift-op-parentheses"
# pragma clang diagnostic push
# pragma clang diagnostic ignored "-Wdate-time"
#elif defined (__GNUC__)
# pragma GCC diagnostic ignored "-Waggregate-return"
# pragma GCC diagnostic push
#endif
// Suppress shadow and unused-value warning for sections:
#if defined (__clang__)
# define lest_SUPPRESS_WSHADOW _Pragma( "clang diagnostic push" ) \
_Pragma( "clang diagnostic ignored \"-Wshadow\"" )
# define lest_SUPPRESS_WUNUSED _Pragma( "clang diagnostic push" ) \
_Pragma( "clang diagnostic ignored \"-Wunused-value\"" )
# define lest_SUPPRESS_WUNREACHABLE _Pragma( "clang diagnostic push" )
# define lest_SUPPRESS_WNORETVAL _Pragma( "clang diagnostic push" )
# define lest_RESTORE_WARNINGS _Pragma( "clang diagnostic pop" )
#elif defined (__GNUC__)
# define lest_SUPPRESS_WSHADOW _Pragma( "GCC diagnostic push" ) \
_Pragma( "GCC diagnostic ignored \"-Wshadow\"" )
# define lest_SUPPRESS_WUNUSED _Pragma( "GCC diagnostic push" ) \
_Pragma( "GCC diagnostic ignored \"-Wunused-value\"" )
# define lest_SUPPRESS_WUNREACHABLE _Pragma( "GCC diagnostic push" )
# define lest_SUPPRESS_WNORETVAL _Pragma( "GCC diagnostic push" )
# define lest_RESTORE_WARNINGS _Pragma( "GCC diagnostic pop" )
#elif defined( _MSC_VER)
# define lest_SUPPRESS_WSHADOW __pragma(warning(push)) __pragma(warning(disable: 4456))
# define lest_SUPPRESS_WUNUSED __pragma(warning(push)) __pragma(warning(disable: 4100))
# define lest_SUPPRESS_WUNREACHABLE __pragma(warning(push)) __pragma(warning(disable: 4702))
# define lest_SUPPRESS_WNORETVAL __pragma(warning(push)) __pragma(warning(disable: 4715))
# define lest_RESTORE_WARNINGS __pragma(warning(pop ))
#else
# define lest_SUPPRESS_WSHADOW /*empty*/
# define lest_SUPPRESS_WUNUSED /*empty*/
# define lest_SUPPRESS_WUNREACHABLE /*empty*/
# define lest_SUPPRESS_WNORETVAL /*empty*/
# define lest_RESTORE_WARNINGS /*empty*/
#endif
#if defined(__NVCOMPILER)
# define lest_SUPPRESS_CONTROLLING_EXPRESSION_IS_CONSTANT _Pragma("diag_suppress 236")
# define lest_RESTORE_CONTROLLING_EXPRESSION_IS_CONSTANT _Pragma("diag_default 236")
#else
# define lest_SUPPRESS_CONTROLLING_EXPRESSION_IS_CONSTANT
# define lest_RESTORE_CONTROLLING_EXPRESSION_IS_CONSTANT
#endif
// Stringify:
#define lest_STRINGIFY( x ) lest_STRINGIFY_( x )
#define lest_STRINGIFY_( x ) #x
// Compiler versions:
#if defined( _MSC_VER ) && !defined( __clang__ )
# define lest_COMPILER_MSVC_VERSION ( _MSC_VER / 10 - 10 * ( 5 + ( _MSC_VER < 1900 ) ) )
#else
# define lest_COMPILER_MSVC_VERSION 0
#endif
#define lest_COMPILER_VERSION( major, minor, patch ) ( 10 * ( 10 * major + minor ) + patch )
#if defined (__clang__)
# define lest_COMPILER_CLANG_VERSION lest_COMPILER_VERSION( __clang_major__, __clang_minor__, __clang_patchlevel__ )
#else
# define lest_COMPILER_CLANG_VERSION 0
#endif
#if defined (__GNUC__)
# define lest_COMPILER_GNUC_VERSION lest_COMPILER_VERSION( __GNUC__, __GNUC_MINOR__, __GNUC_PATCHLEVEL__ )
#else
# define lest_COMPILER_GNUC_VERSION 0
#endif
// C++ language version detection (C++20 is speculative):
// Note: VC14.0/1900 (VS2015) lacks too much from C++14.
#ifndef lest_CPLUSPLUS
# if defined(_MSVC_LANG ) && !defined(__clang__)
# define lest_CPLUSPLUS (_MSC_VER == 1900 ? 201103L : _MSVC_LANG )
# else
# define lest_CPLUSPLUS __cplusplus
# endif
#endif
#define lest_CPP98_OR_GREATER ( lest_CPLUSPLUS >= 199711L )
#define lest_CPP11_OR_GREATER ( lest_CPLUSPLUS >= 201103L || lest_COMPILER_MSVC_VERSION >= 120 )
#define lest_CPP14_OR_GREATER ( lest_CPLUSPLUS >= 201402L )
#define lest_CPP17_OR_GREATER ( lest_CPLUSPLUS >= 201703L )
#define lest_CPP20_OR_GREATER ( lest_CPLUSPLUS >= 202000L )
#define lest_CPP11_100 (lest_CPP11_OR_GREATER || lest_COMPILER_MSVC_VERSION >= 100)
#ifndef __has_cpp_attribute
# define __has_cpp_attribute(name) 0
#endif
// Indicate argument as possibly unused, if possible:
#if __has_cpp_attribute(maybe_unused) && lest_CPP17_OR_GREATER
# define lest_MAYBE_UNUSED(ARG) [[maybe_unused]] ARG
#elif defined (__GNUC__)
# define lest_MAYBE_UNUSED(ARG) ARG __attribute((unused))
#else
# define lest_MAYBE_UNUSED(ARG) ARG
#endif
// Presence of language and library features:
#define lest_HAVE(FEATURE) ( lest_HAVE_##FEATURE )
#if lest_COMPILER_CLANG_VERSION
# ifdef __OBJC__
// There are a bunch of inconsistencies about __EXCEPTIONS and __has_feature(cxx_exceptions) in Clang 3.4/3.5/3.6.
// We're interested in C++ exceptions, which can be checked by __has_feature(cxx_exceptions) in 3.5+.
// In pre-3.5, __has_feature(cxx_exceptions) can be true if ObjC exceptions are enabled, but C++ exceptions are disabled.
// The recommended way to check is `__EXCEPTIONS && __has_feature(cxx_exceptions)`.
// See https://releases.llvm.org/3.6.0/tools/clang/docs/ReleaseNotes.html#the-exceptions-macro
// Note: this is only relevant in Objective-C++, thus the ifdef.
# if __EXCEPTIONS && __has_feature(cxx_exceptions)
# define lest_HAVE_EXCEPTIONS 1
# else
# define lest_HAVE_EXCEPTIONS 0
# endif // __EXCEPTIONS && __has_feature(cxx_exceptions)
# else
// clang-cl doesn't define __EXCEPTIONS for MSVC compatibility (see https://reviews.llvm.org/D4065).
// Neither does Clang in MS-compatiblity mode.
// Let's hope no one tries to build Objective-C++ code using MS-compatibility mode or clang-cl.
# if __has_feature(cxx_exceptions)
# define lest_HAVE_EXCEPTIONS 1
# else
# define lest_HAVE_EXCEPTIONS 0
# endif
# endif
#elif lest_COMPILER_GNUC_VERSION
# if lest_COMPILER_GNUC_VERSION >= 1 && lest_COMPILER_GNUC_VERSION < 500
# ifdef __EXCEPTIONS
# define lest_HAVE_EXCEPTIONS 1
# else
# define lest_HAVE_EXCEPTIONS 0
# endif // __EXCEPTIONS
# else
# ifdef __cpp_exceptions
# define lest_HAVE_EXCEPTIONS 1
# else
# define lest_HAVE_EXCEPTIONS 0
# endif // __cpp_exceptions
# endif // lest_COMPILER_GNUC_VERSION >= 1 && lest_COMPILER_GNUC_VERSION < 500
#elif lest_COMPILER_MSVC_VERSION
# ifdef _CPPUNWIND
# define lest_HAVE_EXCEPTIONS 1
# else
# define lest_HAVE_EXCEPTIONS 0
# endif // _CPPUNWIND
#else
// For all other compilers, assume exceptions are always enabled.
# define lest_HAVE_EXCEPTIONS 1
#endif
// Exception handling helpers:
#if lest_HAVE( EXCEPTIONS )
# define lest_TRY try
# define lest_CATCH(x) catch (x)
# define lest_CATCH_ALL catch (...)
# define lest_THROW(x) throw x
# define lest_RETHROW throw
#else // ! lest_HAVE( EXCEPTIONS )
# define lest_TRY if (1)
# define lest_CATCH(x) else if (0)
# define lest_CATCH_ALL else if (0)
# define lest_THROW(x) std::terminate()
# define lest_RETHROW
#endif // lest_HAVE( EXCEPTIONS )
// Presence of C++11 language features:
#define lest_HAVE_NOEXCEPT ( lest_CPP11_100 )
#define lest_HAVE_NULLPTR ( lest_CPP11_100 )
// C++ feature usage:
#if lest_HAVE( NULLPTR )
# define lest_nullptr nullptr
#else
# define lest_nullptr NULL
#endif
// Additional includes and tie:
#if lest_CPP11_100
# include <cstdint>
# include <random>
# include <tuple>
namespace lest
{
using std::tie;
}
#else
# if !defined(__clang__) && defined(__GNUC__)
# pragma GCC diagnostic push
# pragma GCC diagnostic ignored "-Weffc++"
# endif
namespace lest
{
// tie:
template< typename T1, typename T2 >
struct Tie
{
Tie( T1 & first_, T2 & second_)
: first( first_), second( second_) {}
std::pair<T1, T2> const &
operator=( std::pair<T1, T2> const & rhs )
{
first = rhs.first;
second = rhs.second;
return rhs;
}
private:
void operator=( Tie const & );
T1 & first;
T2 & second;
};
template< typename T1, typename T2 >
inline Tie<T1,T2> tie( T1 & first, T2 & second )
{
return Tie<T1, T2>( first, second );
}
}
# if !defined(__clang__) && defined(__GNUC__)
# pragma GCC diagnostic pop
# endif
#endif // lest_CPP11_100
namespace lest
{
using std::abs;
using std::min;
using std::strtol;
using std::rand;
using std::srand;
}
#if ! defined( lest_NO_SHORT_MACRO_NAMES ) && ! defined( lest_NO_SHORT_ASSERTION_NAMES )
# define SETUP lest_SETUP
# define SECTION lest_SECTION
# define EXPECT lest_EXPECT
# define EXPECT_NOT lest_EXPECT_NOT
# define EXPECT_NO_THROW lest_EXPECT_NO_THROW
# define EXPECT_THROWS lest_EXPECT_THROWS
# define EXPECT_THROWS_AS lest_EXPECT_THROWS_AS
# define SCENARIO lest_SCENARIO
# define GIVEN lest_GIVEN
# define WHEN lest_WHEN
# define THEN lest_THEN
# define AND_WHEN lest_AND_WHEN
# define AND_THEN lest_AND_THEN
#endif
#define lest_SCENARIO( specification, sketch ) \
lest_CASE( specification, lest::text("Scenario: ") + sketch )
#define lest_GIVEN( context ) lest_SETUP( lest::text(" Given: ") + context )
#define lest_WHEN( story ) lest_SECTION( lest::text(" When: ") + story )
#define lest_THEN( story ) lest_SECTION( lest::text(" Then: ") + story )
#define lest_AND_WHEN( story ) lest_SECTION( lest::text("And then: ") + story )
#define lest_AND_THEN( story ) lest_SECTION( lest::text("And then: ") + story )
#define lest_CASE( specification, proposition ) \
static void lest_FUNCTION( lest::env & ); \
static lest::add_test lest_REGISTRAR( specification, lest::test( proposition, lest_FUNCTION ) ); \
static void lest_FUNCTION( lest_MAYBE_UNUSED( lest::env & lest_env ) )
#define lest_ADD_TEST( specification, test ) \
specification.push_back( test )
#define lest_SETUP( context ) \
for ( int lest__section = 0, lest__count = 1; lest__section < lest__count; lest__count -= 0==lest__section++ ) \
for ( lest::ctx lest__ctx_setup( lest_env, context ); lest__ctx_setup; )
#define lest_SECTION( proposition ) \
lest_SUPPRESS_WSHADOW \
static int lest_UNIQUE( id ) = 0; \
if ( lest::guard( lest_UNIQUE( id ), lest__section, lest__count ) ) \
for ( int lest__section = 0, lest__count = 1; lest__section < lest__count; lest__count -= 0==lest__section++ ) \
for ( lest::ctx lest__ctx_section( lest_env, proposition ); lest__ctx_section; ) \
lest_RESTORE_WARNINGS
#define lest_EXPECT( expr ) \
do { \
lest_TRY \
{ \
lest_SUPPRESS_CONTROLLING_EXPRESSION_IS_CONSTANT \
if ( lest::result score = lest_DECOMPOSE( expr ) ) \
lest_THROW( lest::failure( lest_LOCATION, #expr, score.decomposition ) ); \
else if ( lest_env.pass() ) \
lest::report( lest_env.os, lest::passing( lest_LOCATION, #expr, score.decomposition, lest_env.zen() ), lest_env.context() ); \
lest_RESTORE_CONTROLLING_EXPRESSION_IS_CONSTANT \
} \
lest_CATCH_ALL \
{ \
lest::inform( lest_LOCATION, #expr ); \
} \
} while ( false )
#define lest_EXPECT_NOT( expr ) \
do { \
lest_TRY \
{ \
lest_SUPPRESS_CONTROLLING_EXPRESSION_IS_CONSTANT \
if ( lest::result score = lest_DECOMPOSE( expr ) ) \
{ \
if ( lest_env.pass() ) \
lest::report( lest_env.os, lest::passing( lest_LOCATION, lest::not_expr( #expr ), lest::not_expr( score.decomposition ), lest_env.zen() ), lest_env.context() ); \
} \
else \
lest_THROW( lest::failure( lest_LOCATION, lest::not_expr( #expr ), lest::not_expr( score.decomposition ) ) ); \
lest_RESTORE_CONTROLLING_EXPRESSION_IS_CONSTANT \
} \
lest_CATCH_ALL \
{ \
lest::inform( lest_LOCATION, lest::not_expr( #expr ) ); \
} \
} while ( false )
#define lest_EXPECT_NO_THROW( expr ) \
do \
{ \
lest_TRY \
{ \
lest_SUPPRESS_WUNUSED \
expr; \
lest_RESTORE_WARNINGS \
} \
lest_CATCH_ALL { lest::inform( lest_LOCATION, #expr ); } \
if ( lest_env.pass() ) \
lest::report( lest_env.os, lest::got_none( lest_LOCATION, #expr ), lest_env.context() ); \
} while ( false )
#define lest_EXPECT_THROWS( expr ) \
do \
{ \
lest_TRY \
{ \
lest_SUPPRESS_WUNUSED \
expr; \
lest_RESTORE_WARNINGS \
} \
lest_CATCH_ALL \
{ \
if ( lest_env.pass() ) \
lest::report( lest_env.os, lest::got( lest_LOCATION, #expr ), lest_env.context() ); \
break; \
} \
lest_THROW( lest::expected( lest_LOCATION, #expr ) ); \
} \
while ( false )
#define lest_EXPECT_THROWS_AS( expr, excpt ) \
do \
{ \
lest_TRY \
{ \
lest_SUPPRESS_WUNUSED \
expr; \
lest_RESTORE_WARNINGS \
} \
lest_CATCH( excpt & ) \
{ \
if ( lest_env.pass() ) \
lest::report( lest_env.os, lest::got( lest_LOCATION, #expr, lest::of_type( #excpt ) ), lest_env.context() ); \
break; \
} \
lest_CATCH_ALL {} \
lest_THROW( lest::expected( lest_LOCATION, #expr, lest::of_type( #excpt ) ) ); \
} \
while ( false )
#define lest_DECOMPOSE( expr ) ( lest::expression_decomposer() << expr )
#define lest_STRING( name ) lest_STRING2( name )
#define lest_STRING2( name ) #name
#define lest_UNIQUE( name ) lest_UNIQUE2( name, __LINE__ )
#define lest_UNIQUE2( name, line ) lest_UNIQUE3( name, line )
#define lest_UNIQUE3( name, line ) name ## line
#define lest_LOCATION lest::location(__FILE__, __LINE__)
#define lest_FUNCTION lest_UNIQUE(__lest_function__ )
#define lest_REGISTRAR lest_UNIQUE(__lest_registrar__ )
#define lest_DIMENSION_OF( a ) ( sizeof(a) / sizeof(0[a]) )
namespace lest {
const int exit_max_value = 255;
typedef std::string text;
typedef std::vector<text> texts;
struct env;
struct test
{
text name;
void (* behaviour)( env & );
test( text name_, void (* behaviour_)( env & ) )
: name( name_), behaviour( behaviour_) {}
};
typedef std::vector<test> tests;
typedef tests test_specification;
struct add_test
{
add_test( tests & specification, test const & test_case )
{
specification.push_back( test_case );
}
};
struct result
{
const bool passed;
const text decomposition;
template< typename T >
result( T const & passed_, text decomposition_)
: passed( !!passed_), decomposition( decomposition_) {}
operator bool() { return ! passed; }
};
struct location
{
const text file;
const int line;
location( text file_, int line_)
: file( file_), line( line_) {}
};
struct comment
{
const text info;
comment( text info_) : info( info_) {}
operator bool() { return ! info.empty(); }
};
struct message : std::runtime_error
{
const text kind;
const location where;
const comment note;
#if ! lest_CPP11_OR_GREATER
~message() throw() {}
#endif
message( text kind_, location where_, text expr_, text note_ = "" )
: std::runtime_error( expr_), kind( kind_), where( where_), note( note_) {}
};
struct failure : message
{
failure( location where_, text expr_, text decomposition_)
: message( "failed", where_, expr_ + " for " + decomposition_) {}
};
struct success : message
{
success( text kind_, location where_, text expr_, text note_ = "" )
: message( kind_, where_, expr_, note_) {}
};
struct passing : success
{
passing( location where_, text expr_, text decomposition_, bool zen )
: success( "passed", where_, expr_ + (zen ? "":" for " + decomposition_) ) {}
};
struct got_none : success
{
got_none( location where_, text expr_)
: success( "passed: got no exception", where_, expr_) {}
};
struct got : success
{
got( location where_, text expr_)
: success( "passed: got exception", where_, expr_) {}
got( location where_, text expr_, text excpt_)
: success( "passed: got exception " + excpt_, where_, expr_) {}
};
struct expected : message
{
expected( location where_, text expr_, text excpt_ = "" )
: message( "failed: didn't get exception", where_, expr_, excpt_) {}
};
struct unexpected : message
{
unexpected( location where_, text expr_, text note_ = "" )
: message( "failed: got unexpected exception", where_, expr_, note_) {}
};
struct guard
{
int & id;
int const & section;
guard( int & id_, int const & section_, int & count )
: id( id_ ), section( section_ )
{
if ( section == 0 )
id = count++ - 1;
}
operator bool() { return id == section; }
};
class approx
{
public:
explicit approx ( double magnitude )
: epsilon_ ( 100.0 * static_cast<double>( std::numeric_limits<float>::epsilon() ) )
, scale_ ( 1.0 )
, magnitude_( magnitude ) {}
static approx custom() { return approx( 0 ); }
approx operator()( double new_magnitude )
{
approx appr( new_magnitude );
appr.epsilon( epsilon_ );
appr.scale ( scale_ );
return appr;
}
double magnitude() const { return magnitude_; }
approx & epsilon( double epsilon ) { epsilon_ = epsilon; return *this; }
approx & scale ( double scale ) { scale_ = scale; return *this; }
friend bool operator == ( double lhs, approx const & rhs )
{
// Thanks to Richard Harris for his help refining this formula.
return lest::abs( lhs - rhs.magnitude_ ) < rhs.epsilon_ * ( rhs.scale_ + (lest::min)( lest::abs( lhs ), lest::abs( rhs.magnitude_ ) ) );
}
friend bool operator == ( approx const & lhs, double rhs ) { return operator==( rhs, lhs ); }
friend bool operator != ( double lhs, approx const & rhs ) { return !operator==( lhs, rhs ); }
friend bool operator != ( approx const & lhs, double rhs ) { return !operator==( rhs, lhs ); }
friend bool operator <= ( double lhs, approx const & rhs ) { return lhs < rhs.magnitude_ || lhs == rhs; }
friend bool operator <= ( approx const & lhs, double rhs ) { return lhs.magnitude_ < rhs || lhs == rhs; }
friend bool operator >= ( double lhs, approx const & rhs ) { return lhs > rhs.magnitude_ || lhs == rhs; }
friend bool operator >= ( approx const & lhs, double rhs ) { return lhs.magnitude_ > rhs || lhs == rhs; }
private:
double epsilon_;
double scale_;
double magnitude_;
};
inline bool is_false( ) { return false; }
inline bool is_true ( bool flag ) { return flag; }
inline text not_expr( text message )
{
return "! ( " + message + " )";
}
inline text with_message( text message )
{
return "with message \"" + message + "\"";
}
inline text of_type( text type )
{
return "of type " + type;
}
inline void inform( location where, text expr )
{
lest_TRY
{
lest_RETHROW;
}
lest_CATCH( failure const & )
{
lest_RETHROW;
}
lest_CATCH( std::exception const & e )
{
#if lest_HAVE( EXCEPTIONS )
lest_THROW( unexpected( where, expr, with_message( e.what() ) ) );
#endif // lest_HAVE( EXCEPTIONS )
}
lest_CATCH_ALL
{
lest_THROW( unexpected( where, expr, "of unknown type" ) );
}
}
// Expression decomposition:
inline bool unprintable( char c ) { return 0 <= c && c < ' '; }
inline std::string to_hex_string(char c)
{
std::ostringstream os;
os << "\\x" << std::hex << std::setw(2) << std::setfill('0') << static_cast<int>( static_cast<unsigned char>(c) );
return os.str();
}
inline std::string transformed( char chr )
{
struct Tr { char chr; char const * str; } table[] =
{
{'\\', "\\\\" },
{'\r', "\\r" }, {'\f', "\\f" },
{'\n', "\\n" }, {'\t', "\\t" },
};
for ( Tr * pos = table; pos != table + lest_DIMENSION_OF( table ); ++pos )
{
if ( chr == pos->chr )
return pos->str;
}
return unprintable( chr ) ? to_hex_string( chr ) : std::string( 1, chr );
}
template< typename C >
inline std::string make_tran_string( std::basic_string< C > const & txt )
{
std::ostringstream os;
for( typename std::basic_string< C >::const_iterator pos = txt.begin(); pos != txt.end(); ++pos )
os << transformed( static_cast<char>( *pos ) );
return os.str();
}
template< typename T >
inline std::string to_string( T const & value );
#if lest_CPP11_OR_GREATER || lest_COMPILER_MSVC_VERSION >= 100
inline std::string to_string( std::nullptr_t const & ) { return "nullptr"; }
#endif
inline std::string to_string( std::string const & txt ) { return "\"" + make_tran_string( txt ) + "\""; }
inline std::string to_string( wchar_t const * const & txt ) { return "\"" + make_tran_string( std::wstring( txt ) ) + "\""; }
inline std::string to_string( char const * const & txt ) { return "\"" + make_tran_string( std::string( txt ) ) + "\""; }
inline std::string to_string( char const & chr ) { return "'" + make_tran_string( std::string( 1, chr ) ) + "'"; }
inline std::string to_string( signed char const & chr ) { return to_string( static_cast<char>( chr ) ); }
inline std::string to_string( unsigned char const & chr ) { return to_string( static_cast<char>( chr ) ); }
inline std::ostream & operator<<( std::ostream & os, approx const & appr )
{
return os << appr.magnitude();
}
template< typename T >
inline std::string make_string( T const * ptr )
{
// Note showbase affects the behavior of /integer/ output;
std::ostringstream os;
os << std::internal << std::hex << std::showbase << std::setw( 2 + 2 * sizeof(T*) ) << std::setfill('0') << reinterpret_cast<std::ptrdiff_t>( ptr );
return os.str();
}
template< typename C, typename R >
inline std::string make_string( R C::* ptr )
{
std::ostringstream os;
os << std::internal << std::hex << std::showbase << std::setw( 2 + 2 * sizeof(R C::* ) ) << std::setfill('0') << ptr;
return os.str();
}
template< typename T >
struct string_maker
{
static std::string to_string( T const & value )
{
std::ostringstream os; os << std::boolalpha << value;
return os.str();
}
};
template< >
struct string_maker< wchar_t >
{
static std::string to_string( wchar_t value )
{
std::ostringstream os; os << std::boolalpha << static_cast<char>( value );
return os.str();
}
};
template< typename T >
struct string_maker< T* >
{
static std::string to_string( T const * ptr )
{
return ! ptr ? lest_STRING( lest_nullptr ) : make_string( ptr );
}
};
template< typename C, typename R >
struct string_maker< R C::* >
{
static std::string to_string( R C::* ptr )
{
return ! ptr ? lest_STRING( lest_nullptr ) : make_string( ptr );
}
};
template< typename T >
inline std::string to_string( T const & value )
{
return string_maker<T>::to_string( value );
}
template< typename T1, typename T2 >
std::string to_string( std::pair<T1,T2> const & pair )
{
std::ostringstream oss;
oss << "{ " << to_string( pair.first ) << ", " << to_string( pair.second ) << " }";
return oss.str();
}
#if lest_CPP11_OR_GREATER
template< typename TU, std::size_t N >
struct make_tuple_string
{
static std::string make( TU const & tuple )
{
std::ostringstream os;
os << to_string( std::get<N - 1>( tuple ) ) << ( N < std::tuple_size<TU>::value ? ", ": " ");
return make_tuple_string<TU, N - 1>::make( tuple ) + os.str();
}
};
template< typename TU >
struct make_tuple_string<TU, 0>
{
static std::string make( TU const & ) { return ""; }
};
template< typename ...TS >
auto to_string( std::tuple<TS...> const & tuple ) -> std::string
{
return "{ " + make_tuple_string<std::tuple<TS...>, sizeof...(TS)>::make( tuple ) + "}";
}
#endif // lest_CPP11_OR_GREATER
template< typename L, typename R >
std::string to_string( L const & lhs, std::string op, R const & rhs )
{
std::ostringstream os; os << to_string( lhs ) << " " << op << " " << to_string( rhs ); return os.str();
}
template< typename L >
struct expression_lhs
{
L lhs;
expression_lhs( L lhs_) : lhs( lhs_) {}
operator result() { return result( !!lhs, to_string( lhs ) ); }
template< typename R > result operator==( R const & rhs ) { return result( lhs == rhs, to_string( lhs, "==", rhs ) ); }
template< typename R > result operator!=( R const & rhs ) { return result( lhs != rhs, to_string( lhs, "!=", rhs ) ); }
template< typename R > result operator< ( R const & rhs ) { return result( lhs < rhs, to_string( lhs, "<" , rhs ) ); }
template< typename R > result operator<=( R const & rhs ) { return result( lhs <= rhs, to_string( lhs, "<=", rhs ) ); }
template< typename R > result operator> ( R const & rhs ) { return result( lhs > rhs, to_string( lhs, ">" , rhs ) ); }
template< typename R > result operator>=( R const & rhs ) { return result( lhs >= rhs, to_string( lhs, ">=", rhs ) ); }
};
struct expression_decomposer
{
template< typename L >
expression_lhs<L const &> operator<< ( L const & operand )
{
return expression_lhs<L const &>( operand );
}
};
// Reporter:
#if lest_FEATURE_COLOURISE
inline text red ( text words ) { return "\033[1;31m" + words + "\033[0m"; }
inline text green( text words ) { return "\033[1;32m" + words + "\033[0m"; }
inline text gray ( text words ) { return "\033[1;30m" + words + "\033[0m"; }
inline bool starts_with( text words, text with )
{
return 0 == words.find( with );
}
inline text replace( text words, text from, text to )
{
size_t pos = words.find( from );
return pos == std::string::npos ? words : words.replace( pos, from.length(), to );
}
inline text colour( text words )
{
if ( starts_with( words, "failed" ) ) return replace( words, "failed", red ( "failed" ) );
else if ( starts_with( words, "passed" ) ) return replace( words, "passed", green( "passed" ) );
return replace( words, "for", gray( "for" ) );
}
inline bool is_cout( std::ostream & os ) { return &os == &std::cout; }
struct colourise
{
const text words;
colourise( text words )
: words( words ) {}
// only colourise for std::cout, not for a stringstream as used in tests:
std::ostream & operator()( std::ostream & os ) const
{
return is_cout( os ) ? os << colour( words ) : os << words;
}
};
inline std::ostream & operator<<( std::ostream & os, colourise words ) { return words( os ); }
#else
inline text colourise( text words ) { return words; }
#endif
inline text pluralise( text word,int n )
{
return n == 1 ? word : word + "s";
}
inline std::ostream & operator<<( std::ostream & os, comment note )
{
return os << (note ? " " + note.info : "" );
}
inline std::ostream & operator<<( std::ostream & os, location where )
{
#ifdef __GNUG__
return os << where.file << ":" << where.line;
#else
return os << where.file << "(" << where.line << ")";
#endif
}
inline void report( std::ostream & os, message const & e, text test )
{
os << e.where << ": " << colourise( e.kind ) << e.note << ": " << test << ": " << colourise( e.what() ) << std::endl;
}
// Test runner:
#if lest_FEATURE_REGEX_SEARCH
inline bool search( text re, text line )
{
return std::regex_search( line, std::regex( re ) );
}
#else
inline bool case_insensitive_equal( char a, char b )
{
return tolower( a ) == tolower( b );
}
inline bool search( text part, text line )
{
return std::search(
line.begin(), line.end(),
part.begin(), part.end(), case_insensitive_equal ) != line.end();
}
#endif
inline bool match( texts whats, text line )
{
for ( texts::iterator what = whats.begin(); what != whats.end() ; ++what )
{
if ( search( *what, line ) )
return true;
}
return false;
}
inline bool hidden( text name )
{
#if lest_FEATURE_REGEX_SEARCH
texts skipped; skipped.push_back( "\\[\\.\\]" ); skipped.push_back( "\\[hide\\]" );
#else
texts skipped; skipped.push_back( "[." ); skipped.push_back( "[hide]" );
#endif