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|
// Boost ios_state_unit_test.cpp test file ---------------------------------//
// Copyright 2003 Daryle Walker. Use, modification, and distribution are
// subject to the Boost Software License, Version 1.0. (See accompanying file
// LICENSE_1_0.txt or a copy at <http://www.boost.org/LICENSE_1_0.txt>.)
// See <http://www.boost.org/libs/io/> for the library's home page.
// Revision History
// 12 Sep 2003 Initial version (Daryle Walker)
#include <boost/io/ios_state.hpp> // for boost::io::ios_flags_saver, etc.
#include <boost/test/unit_test.hpp> // for main, BOOST_CHECK, etc.
#include <cstddef> // for NULL
#include <iomanip> // for std::setiosflags, etc.
#include <ios> // for std::ios_base
#include <iostream> // for std::cout, std::cerr, etc.
#include <istream> // for std::iostream
#include <locale> // for std::locale, std::numpunct
#include <sstream> // for std::stringstream, etc.
// Global constants
int const word_index = std::ios_base::xalloc();
// Facet with the (classic) bool names spelled backwards
class backward_bool_names
: public std::numpunct<char>
{
typedef std::numpunct<char> base_type;
public:
explicit backward_bool_names( std::size_t refs = 0 )
: base_type( refs )
{}
protected:
virtual ~backward_bool_names() {}
virtual base_type::string_type do_truename() const
{ return "eurt"; }
virtual base_type::string_type do_falsename() const
{ return "eslaf"; }
};
// Unit test for format-flag saving
void
ios_flags_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
{
boost::io::ios_flags_saver ifs( ss );
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
ss << noskipws << fixed << boolalpha;
BOOST_CHECK_EQUAL( (ios_base::boolalpha | ios_base::dec
| ios_base::fixed), ss.flags() );
}
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
{
boost::io::ios_flags_saver ifs( ss, (ios_base::showbase
| ios_base::internal) );
BOOST_CHECK_EQUAL( (ios_base::showbase | ios_base::internal),
ss.flags() );
ss << setiosflags( ios_base::unitbuf );
BOOST_CHECK_EQUAL( (ios_base::showbase | ios_base::internal
| ios_base::unitbuf), ss.flags() );
}
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
}
// Unit test for precision saving
void
ios_precision_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK_EQUAL( 6, ss.precision() );
{
boost::io::ios_precision_saver ips( ss );
BOOST_CHECK_EQUAL( 6, ss.precision() );
ss << setprecision( 4 );
BOOST_CHECK_EQUAL( 4, ss.precision() );
}
BOOST_CHECK_EQUAL( 6, ss.precision() );
{
boost::io::ios_precision_saver ips( ss, 8 );
BOOST_CHECK_EQUAL( 8, ss.precision() );
ss << setprecision( 10 );
BOOST_CHECK_EQUAL( 10, ss.precision() );
}
BOOST_CHECK_EQUAL( 6, ss.precision() );
}
// Unit test for width saving
void
ios_width_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK_EQUAL( 0, ss.width() );
{
boost::io::ios_width_saver iws( ss );
BOOST_CHECK_EQUAL( 0, ss.width() );
ss << setw( 4 );
BOOST_CHECK_EQUAL( 4, ss.width() );
}
BOOST_CHECK_EQUAL( 0, ss.width() );
{
boost::io::ios_width_saver iws( ss, 8 );
BOOST_CHECK_EQUAL( 8, ss.width() );
ss << setw( 10 );
BOOST_CHECK_EQUAL( 10, ss.width() );
}
BOOST_CHECK_EQUAL( 0, ss.width() );
}
// Unit test for I/O-state saving
void
ios_iostate_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.rdstate() );
BOOST_CHECK( ss.good() );
{
boost::io::ios_iostate_saver iis( ss );
char c;
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.rdstate() );
BOOST_CHECK( ss.good() );
ss >> c;
BOOST_CHECK_EQUAL( (ios_base::eofbit | ios_base::failbit),
ss.rdstate() );
BOOST_CHECK( ss.eof() );
BOOST_CHECK( ss.fail() );
BOOST_CHECK( !ss.bad() );
}
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.rdstate() );
BOOST_CHECK( ss.good() );
{
boost::io::ios_iostate_saver iis( ss, ios_base::eofbit );
BOOST_CHECK_EQUAL( ios_base::eofbit, ss.rdstate() );
BOOST_CHECK( ss.eof() );
ss.setstate( ios_base::badbit );
BOOST_CHECK_EQUAL( (ios_base::eofbit | ios_base::badbit),
ss.rdstate() );
BOOST_CHECK( ss.eof() );
BOOST_CHECK( ss.fail() );
BOOST_CHECK( ss.bad() );
}
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.rdstate() );
BOOST_CHECK( ss.good() );
}
// Unit test for exception-flag saving
void
ios_exception_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.exceptions() );
{
boost::io::ios_exception_saver ies( ss );
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.exceptions() );
ss.exceptions( ios_base::failbit );
BOOST_CHECK_EQUAL( ios_base::failbit, ss.exceptions() );
{
boost::io::ios_iostate_saver iis( ss );
char c;
BOOST_CHECK_THROW( ss >> c, std::ios_base::failure );
}
}
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.exceptions() );
{
boost::io::ios_exception_saver ies( ss, ios_base::eofbit );
BOOST_CHECK_EQUAL( ios_base::eofbit, ss.exceptions() );
ss.exceptions( ios_base::badbit );
BOOST_CHECK_EQUAL( ios_base::badbit, ss.exceptions() );
{
boost::io::ios_iostate_saver iis( ss );
char c;
BOOST_CHECK_NO_THROW( ss >> c );
}
}
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.exceptions() );
}
// Unit test for tied-stream saving
void
ios_tie_saver_unit_test
(
)
{
using namespace std;
BOOST_CHECK( NULL == cout.tie() );
{
boost::io::ios_tie_saver its( cout );
BOOST_CHECK( NULL == cout.tie() );
cout.tie( &clog );
BOOST_CHECK_EQUAL( &clog, cout.tie() );
}
BOOST_CHECK( NULL == cout.tie() );
{
boost::io::ios_tie_saver its( cout, &clog );
BOOST_CHECK_EQUAL( &clog, cout.tie() );
cout.tie( &cerr );
BOOST_CHECK_EQUAL( &cerr, cout.tie() );
}
BOOST_CHECK( NULL == cout.tie() );
}
// Unit test for connected-streambuf saving
void
ios_rdbuf_saver_unit_test
(
)
{
using namespace std;
iostream s( NULL );
BOOST_CHECK( NULL == s.rdbuf() );
{
stringbuf sb;
boost::io::ios_rdbuf_saver irs( s );
BOOST_CHECK( NULL == s.rdbuf() );
s.rdbuf( &sb );
BOOST_CHECK_EQUAL( &sb, s.rdbuf() );
}
BOOST_CHECK( NULL == s.rdbuf() );
{
stringbuf sb1, sb2( "Hi there" );
boost::io::ios_rdbuf_saver irs( s, &sb1 );
BOOST_CHECK_EQUAL( &sb1, s.rdbuf() );
s.rdbuf( &sb2 );
BOOST_CHECK_EQUAL( &sb2, s.rdbuf() );
}
BOOST_CHECK( NULL == s.rdbuf() );
}
// Unit test for fill-character saving
void
ios_fill_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK_EQUAL( ' ', ss.fill() );
{
boost::io::ios_fill_saver ifs( ss );
BOOST_CHECK_EQUAL( ' ', ss.fill() );
ss.fill( 'x' );
BOOST_CHECK_EQUAL( 'x', ss.fill() );
}
BOOST_CHECK_EQUAL( ' ', ss.fill() );
{
boost::io::ios_fill_saver ifs( ss, '3' );
BOOST_CHECK_EQUAL( '3', ss.fill() );
ss.fill( '+' );
BOOST_CHECK_EQUAL( '+', ss.fill() );
}
BOOST_CHECK_EQUAL( ' ', ss.fill() );
}
// Unit test for locale saving
void
ios_locale_saver_unit_test
(
)
{
using namespace std;
typedef numpunct<char> npc_type;
stringstream ss;
BOOST_CHECK( locale() == ss.getloc() );
// locales are unprintable, so no BOOST_CHECK_EQUAL
BOOST_CHECK( !has_facet<npc_type>(ss.getloc()) || (NULL
== dynamic_cast<backward_bool_names const *>(
&use_facet<npc_type>(ss.getloc()) )) );
// my implementation of has_facet just checks IDs, but doesn't do dynamic
// cast (therefore if a specifc facet type is missing, but its base class
// is available, has_facet will mistakenly[?] match), so I have to do it
// here. I wanted: "BOOST_CHECK( ! has_facet< backward_bool_names >(
// ss.getloc() ) )"
{
boost::io::ios_locale_saver ils( ss );
BOOST_CHECK( locale() == ss.getloc() );
ss.imbue( locale::classic() );
BOOST_CHECK( locale::classic() == ss.getloc() );
}
BOOST_CHECK( locale() == ss.getloc() );
BOOST_CHECK( !has_facet<npc_type>(ss.getloc()) || (NULL
== dynamic_cast<backward_bool_names const *>(
&use_facet<npc_type>(ss.getloc()) )) );
{
boost::io::ios_locale_saver ils( ss, locale::classic() );
BOOST_CHECK( locale::classic() == ss.getloc() );
BOOST_CHECK( !has_facet<npc_type>(ss.getloc()) || (NULL
== dynamic_cast<backward_bool_names const *>(
&use_facet<npc_type>(ss.getloc()) )) );
ss.imbue( locale(locale::classic(), new backward_bool_names) );
BOOST_CHECK( locale::classic() != ss.getloc() );
BOOST_CHECK( has_facet<npc_type>(ss.getloc()) && (NULL
!= dynamic_cast<backward_bool_names const *>(
&use_facet<npc_type>(ss.getloc()) )) );
//BOOST_CHECK( has_facet<backward_bool_names>(ss.getloc()) );
}
BOOST_CHECK( locale() == ss.getloc() );
BOOST_CHECK( !has_facet<npc_type>(ss.getloc()) || (NULL
== dynamic_cast<backward_bool_names const *>(
&use_facet<npc_type>(ss.getloc()) )) );
}
// Unit test for user-defined integer data saving
void
ios_iword_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK_EQUAL( 0, ss.iword(word_index) );
{
boost::io::ios_iword_saver iis( ss, word_index );
BOOST_CHECK_EQUAL( 0, ss.iword(word_index) );
ss.iword( word_index ) = 6;
BOOST_CHECK_EQUAL( 6, ss.iword(word_index) );
}
BOOST_CHECK_EQUAL( 0, ss.iword(word_index) );
{
boost::io::ios_iword_saver iis( ss, word_index, 100 );
BOOST_CHECK_EQUAL( 100, ss.iword(word_index) );
ss.iword( word_index ) = -2000;
BOOST_CHECK_EQUAL( -2000, ss.iword(word_index) );
}
BOOST_CHECK_EQUAL( 0, ss.iword(word_index) );
}
// Unit test for user-defined pointer data saving
void
ios_pword_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK( NULL == ss.pword(word_index) );
{
boost::io::ios_pword_saver ips( ss, word_index );
BOOST_CHECK( NULL == ss.pword(word_index) );
ss.pword( word_index ) = &ss;
BOOST_CHECK_EQUAL( &ss, ss.pword(word_index) );
}
BOOST_CHECK( NULL == ss.pword(word_index) );
{
boost::io::ios_pword_saver ips( ss, word_index, ss.rdbuf() );
BOOST_CHECK_EQUAL( ss.rdbuf(), ss.pword(word_index) );
ss.pword( word_index ) = &ss;
BOOST_CHECK_EQUAL( &ss, ss.pword(word_index) );
}
BOOST_CHECK( NULL == ss.pword(word_index) );
}
// Unit test for all ios_base data saving
void
ios_base_all_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
BOOST_CHECK_EQUAL( 6, ss.precision() );
BOOST_CHECK_EQUAL( 0, ss.width() );
{
boost::io::ios_base_all_saver ibas( ss );
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
BOOST_CHECK_EQUAL( 6, ss.precision() );
BOOST_CHECK_EQUAL( 0, ss.width() );
ss << hex << unitbuf << setprecision( 5 ) << setw( 7 );
BOOST_CHECK_EQUAL( (ios_base::unitbuf | ios_base::hex
| ios_base::skipws), ss.flags() );
BOOST_CHECK_EQUAL( 5, ss.precision() );
BOOST_CHECK_EQUAL( 7, ss.width() );
}
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
BOOST_CHECK_EQUAL( 6, ss.precision() );
BOOST_CHECK_EQUAL( 0, ss.width() );
}
// Unit test for all basic_ios data saving
void
ios_all_saver_unit_test
(
)
{
using namespace std;
typedef numpunct<char> npc_type;
stringbuf sb;
iostream ss( &sb );
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
BOOST_CHECK_EQUAL( 6, ss.precision() );
BOOST_CHECK_EQUAL( 0, ss.width() );
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.rdstate() );
BOOST_CHECK( ss.good() );
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.exceptions() );
BOOST_CHECK( NULL == ss.tie() );
BOOST_CHECK( &sb == ss.rdbuf() );
BOOST_CHECK_EQUAL( ' ', ss.fill() );
BOOST_CHECK( locale() == ss.getloc() );
{
boost::io::ios_all_saver ias( ss );
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
BOOST_CHECK_EQUAL( 6, ss.precision() );
BOOST_CHECK_EQUAL( 0, ss.width() );
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.rdstate() );
BOOST_CHECK( ss.good() );
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.exceptions() );
BOOST_CHECK( NULL == ss.tie() );
BOOST_CHECK( &sb == ss.rdbuf() );
BOOST_CHECK_EQUAL( ' ', ss.fill() );
BOOST_CHECK( locale() == ss.getloc() );
ss << oct << showpos << noskipws;
BOOST_CHECK_EQUAL( (ios_base::showpos | ios_base::oct), ss.flags() );
ss << setprecision( 3 );
BOOST_CHECK_EQUAL( 3, ss.precision() );
ss << setw( 9 );
BOOST_CHECK_EQUAL( 9, ss.width() );
ss.setstate( ios_base::eofbit );
BOOST_CHECK_EQUAL( ios_base::eofbit, ss.rdstate() );
BOOST_CHECK( ss.eof() );
ss.exceptions( ios_base::failbit );
BOOST_CHECK_EQUAL( ios_base::failbit, ss.exceptions() );
{
boost::io::ios_iostate_saver iis( ss );
char c;
BOOST_CHECK_THROW( ss >> c, std::ios_base::failure );
}
ss.tie( &clog );
BOOST_CHECK_EQUAL( &clog, ss.tie() );
ss.rdbuf( cerr.rdbuf() );
BOOST_CHECK_EQUAL( cerr.rdbuf(), ss.rdbuf() );
ss << setfill( 'x' );
BOOST_CHECK_EQUAL( 'x', ss.fill() );
ss.imbue( locale(locale::classic(), new backward_bool_names) );
BOOST_CHECK( locale() != ss.getloc() );
BOOST_CHECK( has_facet<npc_type>(ss.getloc()) && (NULL
!= dynamic_cast<backward_bool_names const *>(
&use_facet<npc_type>(ss.getloc()) )) );
}
BOOST_CHECK_EQUAL( (ios_base::skipws | ios_base::dec), ss.flags() );
BOOST_CHECK_EQUAL( 6, ss.precision() );
BOOST_CHECK_EQUAL( 0, ss.width() );
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.rdstate() );
BOOST_CHECK( ss.good() );
BOOST_CHECK_EQUAL( ios_base::goodbit, ss.exceptions() );
BOOST_CHECK( NULL == ss.tie() );
BOOST_CHECK( &sb == ss.rdbuf() );
BOOST_CHECK_EQUAL( ' ', ss.fill() );
BOOST_CHECK( locale() == ss.getloc() );
}
// Unit test for user-defined data saving
void
ios_word_saver_unit_test
(
)
{
using namespace std;
stringstream ss;
BOOST_CHECK_EQUAL( 0, ss.iword(word_index) );
BOOST_CHECK( NULL == ss.pword(word_index) );
{
boost::io::ios_all_word_saver iaws( ss, word_index );
BOOST_CHECK_EQUAL( 0, ss.iword(word_index) );
BOOST_CHECK( NULL == ss.pword(word_index) );
ss.iword( word_index ) = -11;
ss.pword( word_index ) = ss.rdbuf();
BOOST_CHECK_EQUAL( -11, ss.iword(word_index) );
BOOST_CHECK_EQUAL( ss.rdbuf(), ss.pword(word_index) );
}
BOOST_CHECK_EQUAL( 0, ss.iword(word_index) );
BOOST_CHECK( NULL == ss.pword(word_index) );
}
// Unit test program
boost::unit_test_framework::test_suite *
init_unit_test_suite
(
int , // "argc" is unused
char * [] // "argv" is unused
)
{
boost::unit_test_framework::test_suite * test
= BOOST_TEST_SUITE( "I/O state saver test" );
test->add( BOOST_TEST_CASE(ios_flags_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_precision_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_width_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_iostate_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_exception_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_tie_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_rdbuf_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_fill_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_locale_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_iword_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_pword_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_base_all_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_all_saver_unit_test) );
test->add( BOOST_TEST_CASE(ios_word_saver_unit_test) );
return test;
}
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