// Boost.Units library

// Copyright 2012 Paul A. Bristow  Adding comments and examples of new types.
//
// 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)

#ifdef _MSC_VER
#  pragma warning(disable :4512) // 'boost::tuples::tuple_manipulator<CharType>' : assignment operator could not be generated
#endif


#define BOOST_TEST_MAIN
#include <boost/test/unit_test.hpp>

#include <boost/units/cmath.hpp>
#include <boost/units/io.hpp>
#include <boost/units/systems/si.hpp>
#include <boost/units/systems/si/codata/physico-chemical_constants.hpp>
#include <boost/units/systems/si/io.hpp>
#include <boost/units/quantity.hpp>

#include <libs/units/example/measurement.hpp>  // An uncertain type called measure. 

#include <iostream>
#include <iomanip>

BOOST_AUTO_TEST_CASE(test_output_width)
{
    using namespace boost::units;
    using namespace boost::units::si;
  
    //quantity<length> ql = 2345.6 * meters;
    //std::cout << std::setw(20) << ql << std::endl;

    std::size_t w = 25;

    quantity<length, measurement<double> > qm = measurement<double>(45210.0, 1234.0) * meters;
    // Value is big enough to switch to km if engineering_prefix is chosen.

    std::ostringstream oss;
    // Default right justify.
    oss.fill('*'); // So can see the fill chars clearly.
    std::cout.fill('*');

    std::cout << boost::units::no_prefix << std::setw(w) << qm << std::endl;
    oss << std::setw(w) << boost::units::no_prefix << qm << std::flush;
    BOOST_CHECK_EQUAL(oss.str().size(), w);
    BOOST_CHECK_EQUAL(oss.str(), "*********45210(+/-1234) m");

    //std::cout << oss.str() <<"|" << oss.str().size() << std::endl;
    oss.str("");
    std::cout << boost::units::engineering_prefix << std::setw(w) << qm << std::endl;
    oss << std::setw(w) << boost::units::engineering_prefix << qm << std::flush;
    BOOST_CHECK_EQUAL(oss.str().size(), w);
    BOOST_CHECK_EQUAL(oss.str(),"*******45.21(+/-1.234) km");
    oss.str("");
    
    std::cout << boost::units::binary_prefix << std::setw(w) << qm << std::endl;
    oss << std::setw(w) << boost::units::binary_prefix << qm << std::flush;
    BOOST_CHECK_EQUAL(oss.str().size(), w);
    BOOST_CHECK_EQUAL(oss.str(),"**44.1504(+/-1.20508) Kim");
    oss.str("");

    // Left justify.
    std::cout << std::left << boost::units::no_prefix << std::setw(w) << qm << std::endl;
    oss << std::left << boost::units::no_prefix<< std::setw(w) << qm << std::flush;
    BOOST_CHECK_EQUAL(oss.str().size(), w);
    BOOST_CHECK_EQUAL(oss.str(), "45210(+/-1234) m*********");


    oss.str("");
    std::cout << std::left << boost::units::engineering_prefix << std::setw(w) << qm << std::endl;
    oss << std::left << std::setw(w) << boost::units::engineering_prefix << qm << std::flush;
    BOOST_CHECK_EQUAL(oss.str().size(), w);
    BOOST_CHECK_EQUAL(oss.str(),"45.21(+/-1.234) km*******");
    oss.str("");
    
    std::cout << std::left << boost::units::binary_prefix << std::setw(w) << qm << std::endl;
    oss << std::left << std::setw(w) << boost::units::binary_prefix << qm << std::flush;
    BOOST_CHECK_EQUAL(oss.str().size(), w);
    BOOST_CHECK_EQUAL(oss.str(),"44.1504(+/-1.20508) Kim**");
    oss.str("");

 
} //