catch2/internal/catch_capture.hpp

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/*
* catch_capture.hpp
* Catch
*
* Created by Phil on 18/10/2010.
* Copyright 2010 Two Blue Cubes Ltd. All rights reserved.
*
* Distributed under the Boost Software License, Version 1.0. (See accompanying
* file LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt)
*
*/
#ifndef TWOBLUECUBES_CATCH_CAPTURE_HPP_INCLUDED
#define TWOBLUECUBES_CATCH_CAPTURE_HPP_INCLUDED
#include "catch_resultinfo.hpp"
#include <sstream>
#include "math.h"
namespace Catch
{
template<typename T>
std::string toString( const T& value )
{
std::ostringstream oss;
oss << value;
return oss.str();
}
class TestFailureException
{
};
class DummyExceptionType_DontUse
{
};
class MutableResultInfo : public ResultInfo
{
public:
MutableResultInfo()
{}
MutableResultInfo( const std::string& expr, bool isNot, const std::string& filename, size_t line, const std::string& macroName )
: ResultInfo( ( isNot ? "!" : "" ) + expr, ResultWas::Unknown, isNot, filename, line, macroName )
{
}
void setResultType( ResultWas::OfType result )
{
// Flip bool results if isNot is set
if( m_isNot && result == ResultWas::Ok )
m_result = ResultWas::ExpressionFailed;
else if( m_isNot && result == ResultWas::ExpressionFailed )
m_result = ResultWas::Ok;
else
m_result = result;
}
void setMessage( const std::string& message )
{
m_message = message;
}
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template<typename RhsT>
MutableResultInfo& operator ||( const RhsT& rhs )
{
// !TBD: set message to say we haven't captured all parts
return *this;
}
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private:
friend class ResultBuilder;
void setLhs( const std::string& lhs )
{
m_lhs = lhs;
}
MutableResultInfo& setRhs( const std::string& op, const std::string& rhs )
{
m_op = op;
m_rhs = rhs;
return *this;
}
};
class ResultBuilder
{
public:
ResultBuilder( const char* expr, bool isNot, const std::string& filename, size_t line, const std::string& macroName )
: m_result( expr, isNot, filename, line, macroName )
{}
template<typename T>
ResultBuilder& operator->*(const T & operand)
{
m_result.setLhs( toString( operand ) );
return *this;
}
template<typename RhsT>
MutableResultInfo& operator == ( const RhsT& rhs )
{
return m_result.setRhs( "==", toString( rhs ) );
}
template<typename RhsT>
MutableResultInfo& operator != ( const RhsT& rhs )
{
return m_result.setRhs( "!=", toString( rhs ) );
}
template<typename RhsT>
MutableResultInfo& operator < ( const RhsT& rhs )
{
return m_result.setRhs( "<", toString( rhs ) );
}
template<typename RhsT>
MutableResultInfo& operator > ( const RhsT& rhs )
{
return m_result.setRhs( ">", toString( rhs ) );
}
template<typename RhsT>
MutableResultInfo& operator <= ( const RhsT& rhs )
{
return m_result.setRhs( "<=", toString( rhs ) );
}
template<typename RhsT>
MutableResultInfo& operator >= ( const RhsT& rhs )
{
return m_result.setRhs( ">=", toString( rhs ) );
}
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operator MutableResultInfo&()
{
return m_result;
}
private:
MutableResultInfo m_result;
};
class TestCaseInfo;
struct IResultListener
{
virtual ~IResultListener(){}
virtual void testEnded( const ResultInfo& result ) = 0;
};
class ResultsCapture
{
private:
ResultsCapture()
: m_listener( 0 )
{
}
static ResultsCapture& instance()
{
static ResultsCapture instance;
return instance;
}
public:
static IResultListener* setListener( IResultListener* listener )
{
IResultListener* prevListener = instance().m_listener;
instance().m_listener = listener;
return prevListener;
}
static void acceptExpression( const MutableResultInfo& resultInfo )
{
instance().currentResult = resultInfo;
}
static void acceptResult( bool result, bool stopOnFail )
{
acceptResult( result ? ResultWas::Ok : ResultWas::ExpressionFailed, stopOnFail );
}
static void acceptResult( ResultWas::OfType result, bool stopOnFail )
{
if( !acceptResult( result ) && stopOnFail )
{
throw TestFailureException();
}
}
static bool acceptResult( ResultWas::OfType result )
{
MutableResultInfo& currentResult = instance().currentResult;
currentResult.setResultType( result );
if( instance().m_listener )
{
instance().m_listener->testEnded( currentResult );
}
bool ok = currentResult.ok();
instance().currentResult = MutableResultInfo();
return ok;
}
static bool acceptResult( bool expressionResult )
{
return acceptResult( expressionResult ? ResultWas::Ok : ResultWas::ExpressionFailed );
}
static void acceptMessage( const std::string& msg )
{
instance().currentResult.setMessage( msg );
}
private:
MutableResultInfo currentResult;
IResultListener* m_listener;
};
// !TBD Need to clean this all up
#define CATCH_absTol 1e-10
#define CATCH_relTol 1e-10
class Approx
{
public:
// !TBD more generic
Approx( double d )
: m_d( d )
{
}
template<typename T>
friend bool operator == ( const T& lhs, const Approx& rhs )
{
// !TBD Use proper tolerance
// From: http://realtimecollisiondetection.net/blog/?p=89
// see also: http://www.cygnus-software.com/papers/comparingfloats/comparingfloats.htm
return fabs( lhs - rhs.m_d ) <= std::max( CATCH_absTol, CATCH_relTol * std::max( fabs(lhs), fabs(rhs.m_d) ) );
}
template<typename T>
friend bool operator != ( const T& lhs, const Approx& rhs )
{
return ! operator==( lhs, rhs );
}
double m_d;
};
template<>
inline std::string toString<Approx>( const Approx& value )
{
std::ostringstream oss;
oss << "Approx( " << value.m_d << ")";
return oss.str();
}
} // end namespace Catch
#define INTERNAL_CATCH_TEST( expr, isNot, stopOnFailure, macroName ) \
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Catch::ResultsCapture::acceptExpression( Catch::ResultBuilder( #expr, isNot, __FILE__, __LINE__, macroName )->*expr ); \
Catch::ResultsCapture::acceptResult( expr, stopOnFailure );
#define INTERNAL_CATCH_THROWS( expr, exceptionType, nothrow, stopOnFailure, macroName ) \
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Catch::ResultsCapture::acceptExpression( Catch::ResultBuilder( #expr, false, __FILE__, __LINE__, macroName ) ); \
try \
{ \
expr; \
Catch::ResultsCapture::acceptResult( nothrow, stopOnFailure ); \
} \
catch( exceptionType ) \
{ \
Catch::ResultsCapture::acceptResult( !(nothrow), stopOnFailure ); \
}
#define INTERNAL_CATCH_THROWS_AS( expr, exceptionType, nothrow, stopOnFailure, macroName ) \
INTERNAL_CATCH_THROWS( expr, exceptionType, nothrow, stopOnFailure, macroName ) \
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catch( ... ) \
{ \
Catch::ResultsCapture::acceptResult( false, stopOnFailure ); \
}
#define INTERNAL_CATCH_MSG( reason, resultType, stopOnFailure, macroName ) \
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Catch::ResultsCapture::acceptExpression( Catch::MutableResultInfo( "", false, __FILE__, __LINE__, macroName ) ); \
Catch::ResultsCapture::acceptMessage( reason ); \
Catch::ResultsCapture::acceptResult( resultType, stopOnFailure );
#endif // TWOBLUECUBES_CATCH_CAPTURE_HPP_INCLUDED