algorithm/string/test/regex_test.cpp

//  Boost string_algo library substr_test.cpp file  ------------------//

//  Copyright Pavol Droba 2002-2003. Use, modification and
//  distribution is subject to 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)

//  See http://www.boost.org for updates, documentation, and revision history.

#include <boost/algorithm/string/regex.hpp>
#include <boost/algorithm/string/join.hpp>
#include <boost/algorithm/string/sequence_traits.hpp>
// equals predicate is used for result comparison
#include <boost/algorithm/string/predicate.hpp>


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

#include <string>
#include <vector>
#include <iostream>
#include <boost/regex.hpp>
#include <boost/test/test_tools.hpp>

using namespace std;
using namespace boost;

static void find_test()
{
    string str1("123a1cxxxa23cXXXa456c321");
    const char* pch1="123a1cxxxa23cXXXa456c321";
    regex rx("a[0-9]+c");
    vector<int> vec1( str1.begin(), str1.end() );
    vector<string> tokens;

    // find results
    iterator_range<string::iterator> nc_result;
    iterator_range<string::const_iterator> cv_result;
    
    iterator_range<vector<int>::iterator> nc_vresult;
    iterator_range<vector<int>::const_iterator> cv_vresult;

    iterator_range<const char*> ch_result;

    // basic tests
    nc_result=find_regex( str1, rx );
    BOOST_CHECK( 
        ( (nc_result.begin()-str1.begin()) == 3) &&
        ( (nc_result.end()-str1.begin()) == 6) );

    cv_result=find_regex( str1, rx );
    BOOST_CHECK( 
        ( (cv_result.begin()-str1.begin()) == 3) &&
        ( (cv_result.end()-str1.begin()) == 6) );

    ch_result=find_regex( pch1, rx );
    BOOST_CHECK(( (ch_result.begin() - pch1 ) == 3) && ( (ch_result.end() - pch1 ) == 6 ) );

    // multi-type comparison test
    nc_vresult=find_regex( vec1, rx );
    BOOST_CHECK( 
        ( (nc_result.begin()-str1.begin()) == 3) &&
        ( (nc_result.end()-str1.begin()) == 6) );

    cv_vresult=find_regex( vec1, rx );
    BOOST_CHECK( 
        ( (cv_result.begin()-str1.begin()) == 3) &&
        ( (cv_result.end()-str1.begin()) == 6) );

    // find_all_regex test
    find_all_regex( tokens, str1, rx );

    BOOST_REQUIRE( tokens.size()==3 );
    BOOST_CHECK( tokens[0]==string("a1c") );
    BOOST_CHECK( tokens[1]==string("a23c") );
    BOOST_CHECK( tokens[2]==string("a456c") );

    // split_regex test
    split_regex(    tokens, str1, rx );

    BOOST_REQUIRE( tokens.size()==4 );
    BOOST_CHECK( tokens[0]==string("123") );
    BOOST_CHECK( tokens[1]==string("xxx") );
    BOOST_CHECK( tokens[2]==string("XXX") );
    BOOST_CHECK( tokens[3]==string("321") );

}

static void join_test()
{
    // Prepare inputs
    vector<string> tokens1;
    tokens1.push_back("xx");
    tokens1.push_back("abc");
    tokens1.push_back("xx");

#ifndef BOOST_NO_FUNCTION_TEMPLATE_ORDERING
    BOOST_CHECK( equals(join_if(tokens1, "-", regex("x+")), "xx-xx") );
    BOOST_CHECK( equals(join_if(tokens1, "-", regex("[abc]+")), "abc") );
#else 
    BOOST_CHECK( equals(join_if_regex(tokens1, "-", regex("x+")), "xx-xx") );
    BOOST_CHECK( equals(join_if_regex(tokens1, "-", regex("[abc]+")), "abc") );
#endif 
}

static void replace_test()
{
    string str1("123a1cxxxa23cXXXa456c321");
    regex rx1("a([0-9]+)c");
    regex rx2("([xX]+)");
    regex rx3("_[^_]*_");
    string fmt1("_A$1C_");
    string fmt2("_xXx_");
    vector<int> vec1( str1.begin(), str1.end() );

    // immutable tests
    
    // basic tests
    BOOST_CHECK( replace_regex_copy( str1, rx1, fmt1 )==string("123_A1C_xxxa23cXXXa456c321") );
    BOOST_CHECK( replace_all_regex_copy( str1, rx1, fmt1 )==string("123_A1C_xxx_A23C_XXX_A456C_321") );
    BOOST_CHECK( erase_regex_copy( str1, rx1 )==string("123xxxa23cXXXa456c321") );
    BOOST_CHECK( erase_all_regex_copy( str1, rx1 )==string(string("123xxxXXX321")) );

    // output iterator variants test
    string strout;
    replace_regex_copy( back_inserter(strout), str1, rx1, fmt1 );
    BOOST_CHECK( strout==string("123_A1C_xxxa23cXXXa456c321") );
    strout.clear();
    replace_all_regex_copy( back_inserter(strout), str1, rx1, fmt1 );
    BOOST_CHECK( strout==string("123_A1C_xxx_A23C_XXX_A456C_321") );
    strout.clear();
    erase_regex_copy( back_inserter(strout), str1, rx1 );
    BOOST_CHECK( strout==string("123xxxa23cXXXa456c321") );
    strout.clear();
    erase_all_regex_copy( back_inserter(strout), str1, rx1 );
    BOOST_CHECK( strout==string("123xxxXXX321") );
    strout.clear();

    // in-place test
    replace_regex( str1, rx1, fmt2 );
    BOOST_CHECK( str1==string("123_xXx_xxxa23cXXXa456c321") );

    replace_all_regex( str1, rx2, fmt1 );
    BOOST_CHECK( str1==string("123__AxXxC___AxxxC_a23c_AXXXC_a456c321") );
    erase_regex( str1, rx3 );
    BOOST_CHECK( str1==string("123AxXxC___AxxxC_a23c_AXXXC_a456c321") );
    erase_all_regex( str1, rx3 );
    BOOST_CHECK( str1==string("123AxXxCa23ca456c321") );
}

BOOST_AUTO_TEST_CASE( test_main )
{
    find_test();
    join_test();
    replace_test();
}