text: /*
   * Copyright (C) 2010 Tommi Maekitalo
   * 
   * This library is free software; you can redistribute it and/or
   * modify it under the terms of the GNU Lesser General Public
   * License as published by the Free Software Foundation; either
   * version 2.1 of the License, or (at your option) any later version.
   * 
   * As a special exception, you may use this file as part of a free
   * software library without restriction. Specifically, if other files
   * instantiate templates or use macros or inline functions from this
   * file, or you compile this file and link it with other files to
   * produce an executable, this file does not by itself cause the
   * resulting executable to be covered by the GNU General Public
   * License. This exception does not however invalidate any other
   * reasons why the executable file might be covered by the GNU Library
   * General Public License.
   * 
   * This library is distributed in the hope that it will be useful,
   * but WITHOUT ANY WARRANTY; without even the implied warranty of
   * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
   * Lesser General Public License for more details.
   * 
   * You should have received a copy of the GNU Lesser General Public
   * License along with this library; if not, write to the Free Software
   * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA
   */
  
  #include "cxxtools/convert.h"
  #include "cxxtools/unit/testsuite.h"
  #include "cxxtools/unit/registertest.h"
  #include "cxxtools/string.h"
  #include "cxxtools/log.h"
  #include <limits>
  #include <string.h>
  
  log_define("cxxtools.test.convert")
  
  namespace
  {
      bool nearBy(double v1, double v2, double e = 1e-6)
      {
          double q = v1 / v2;
          return q > 1 - e && q < 1 + e;
      }
  }
  
  class ConvertTest : public cxxtools::unit::TestSuite
  {
      public:
          ConvertTest()
          : cxxtools::unit::TestSuite("convert")
          {
              registerMethod("successTest", *this, &ConvertTest::successTest);
              registerMethod("failTest", *this, &ConvertTest::failTest);
              registerMethod("nanTest", *this, &ConvertTest::nanTest);
              registerMethod("infTest", *this, &ConvertTest::infTest);
              registerMethod("emptyTest", *this, &ConvertTest::emptyTest);
              registerMethod("floatTest", *this, &ConvertTest::floatTest);
          }
  
          void successTest()
          {
            std::string s(" -15 ");
            int n = 0;
            CXXTOOLS_UNIT_ASSERT_NOTHROW(n = cxxtools::convert<int>(s));
            CXXTOOLS_UNIT_ASSERT_EQUALS(n, -15);
  
            cxxtools::String S(L" -42 ");
            CXXTOOLS_UNIT_ASSERT_NOTHROW(n = cxxtools::convert<int>(S));
            CXXTOOLS_UNIT_ASSERT_EQUALS(n, -42);
  
          }
  
          void failTest()
          {
            std::string s(" -15 a");
            CXXTOOLS_UNIT_ASSERT_THROW(cxxtools::convert<int>(s), cxxtools::ConversionError);
  
            cxxtools::String S(L" -42 a");
            CXXTOOLS_UNIT_ASSERT_THROW(cxxtools::convert<int>(S), cxxtools::ConversionError);
  
          }
  
          void nanTest()
          {
            // test string to number
  
            // test nan
  
            double d = cxxtools::convert<double>(std::string("NaN"));
            CXXTOOLS_UNIT_ASSERT(d != d);
  
            float f = cxxtools::convert<float>(std::string("NaN"));
            CXXTOOLS_UNIT_ASSERT(f != f);
  
            d = cxxtools::convert<double>(cxxtools::String(L"NaN"));
            CXXTOOLS_UNIT_ASSERT(d != d);
  
            f = cxxtools::convert<float>(cxxtools::String(L"NaN"));
            CXXTOOLS_UNIT_ASSERT(f != f);
  
            // test quiet nan
  
            d = cxxtools::convert<double>(std::string("NaNQ"));
            CXXTOOLS_UNIT_ASSERT(d != d);
  
            f = cxxtools::convert<float>(std::string("NaNQ"));
            CXXTOOLS_UNIT_ASSERT(f != f);
  
            d = cxxtools::convert<double>(cxxtools::String(L"NaNQ"));
            CXXTOOLS_UNIT_ASSERT(d != d);
  
            f = cxxtools::convert<float>(cxxtools::String(L"NaNQ"));
            CXXTOOLS_UNIT_ASSERT(f != f);
  
            // test signaling nan
  
            d = cxxtools::convert<double>(std::string("NaNS"));
            CXXTOOLS_UNIT_ASSERT(d != d);
  
            f = cxxtools::convert<float>(std::string("NaNS"));
            CXXTOOLS_UNIT_ASSERT(f != f);
  
            d = cxxtools::convert<double>(cxxtools::String(L"NaNS"));
            CXXTOOLS_UNIT_ASSERT(d != d);
  
            f = cxxtools::convert<float>(cxxtools::String(L"NaNS"));
            CXXTOOLS_UNIT_ASSERT(f != f);
  
            CXXTOOLS_UNIT_ASSERT_THROW(cxxtools::convert<float>(cxxtools::String(L"NaNF")), cxxtools::ConversionError);
  
            // test number to string
  
            std::string s = cxxtools::convert<std::string>(d);
            CXXTOOLS_UNIT_ASSERT_EQUALS(s, "nan");
  
            s = cxxtools::convert<std::string>(f);
            CXXTOOLS_UNIT_ASSERT_EQUALS(s, "nan");
  
            cxxtools::String ss = cxxtools::convert<cxxtools::String>(d);
            CXXTOOLS_UNIT_ASSERT_EQUALS(ss.narrow(), "nan");
  
            ss = cxxtools::convert<cxxtools::String>(f);
            CXXTOOLS_UNIT_ASSERT_EQUALS(ss.narrow(), "nan");
  
          }
  
          void infTest()
          {
            // test string to number
  
            double d = cxxtools::convert<double>(std::string("inf"));
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, std::numeric_limits<double>::infinity());
  
            d = cxxtools::convert<double>(std::string("infinity"));
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, std::numeric_limits<double>::infinity());
  
            float f = cxxtools::convert<float>(std::string("inf"));
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, std::numeric_limits<float>::infinity());
  
            d = cxxtools::convert<double>(cxxtools::String(L"iNf"));
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, std::numeric_limits<double>::infinity());
  
            f = cxxtools::convert<float>(cxxtools::String(L"inF"));
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, std::numeric_limits<float>::infinity());
  
            // test number to string
  
            std::string s = cxxtools::convert<std::string>(d);
            CXXTOOLS_UNIT_ASSERT_EQUALS(s, "inf");
  
            s = cxxtools::convert<std::string>(f);
            CXXTOOLS_UNIT_ASSERT(strcasecmp(s.c_str(), "inf") == 0);
  
            cxxtools::String ss = cxxtools::convert<cxxtools::String>(d);
            CXXTOOLS_UNIT_ASSERT(strcasecmp(ss.narrow().c_str(), "inf") == 0);
  
            ss = cxxtools::convert<cxxtools::String>(f);
            CXXTOOLS_UNIT_ASSERT(strcasecmp(ss.narrow().c_str(), "inf") == 0);
  
            // negative inf
  
            // string to number
            d = cxxtools::convert<double>(std::string("-inf"));
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, -std::numeric_limits<double>::infinity());
  
            f = cxxtools::convert<float>(std::string("-inf"));
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, -std::numeric_limits<float>::infinity());
  
            d = cxxtools::convert<double>(cxxtools::String(L"-iNf"));
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, -std::numeric_limits<double>::infinity());
  
            f = cxxtools::convert<float>(cxxtools::String(L"-INF"));
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, -std::numeric_limits<float>::infinity());
  
            // test number to string
            s = cxxtools::convert<std::string>(d);
            CXXTOOLS_UNIT_ASSERT_EQUALS(s, "-inf");
  
            s = cxxtools::convert<std::string>(f);
            CXXTOOLS_UNIT_ASSERT(strcasecmp(s.c_str(), "-inf") == 0);
  
            ss = cxxtools::convert<cxxtools::String>(d);
            CXXTOOLS_UNIT_ASSERT(strcasecmp(ss.narrow().c_str(), "-inf") == 0);
  
            ss = cxxtools::convert<cxxtools::String>(f);
            CXXTOOLS_UNIT_ASSERT(strcasecmp(ss.narrow().c_str(), "-inf") == 0);
  
          }
  
          void emptyTest()
          {
            std::string emptyString;
            CXXTOOLS_UNIT_ASSERT_THROW(cxxtools::convert<int>(std::string()), cxxtools::ConversionError);
            CXXTOOLS_UNIT_ASSERT_THROW(cxxtools::convert<int>(cxxtools::String()), cxxtools::ConversionError);
            CXXTOOLS_UNIT_ASSERT_THROW(cxxtools::convert<unsigned>(std::string()), cxxtools::ConversionError);
            CXXTOOLS_UNIT_ASSERT_THROW(cxxtools::convert<unsigned>(cxxtools::String()), cxxtools::ConversionError);
            CXXTOOLS_UNIT_ASSERT_THROW(cxxtools::convert<double>(std::string()), cxxtools::ConversionError);
            CXXTOOLS_UNIT_ASSERT_THROW(cxxtools::convert<double>(cxxtools::String()), cxxtools::ConversionError);
          }
  
          void t(double d)
          {
            std::string s = cxxtools::convert<std::string>(d);
            double r = cxxtools::convert<double>(s);
            if (r == 0)
            {
              CXXTOOLS_UNIT_ASSERT_EQUALS(d, 0);
            }
            else
            {
              double q = d / r;
              log_debug("d=" << d << " s=\"" << s << "\" r=" << r << " q=" << q);
              if (q < 0.999999999999 || q > 1.0000000000001)
              {
                CXXTOOLS_UNIT_ASSERT_EQUALS(d, r);
              }
            }
          }
  
          void floatTest()
          {
            double d;
  
            d = cxxtools::convert<double>("1.5");
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, 1.5);
  
            d = cxxtools::convert<double>(" -345.75 ");
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, -345.75);
  
            d = cxxtools::convert<double>("\n1e6\r");
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, 1e6);
  
            d = cxxtools::convert<double>("7.0e4");
            CXXTOOLS_UNIT_ASSERT_EQUALS(d, 7e4);
  
            d = cxxtools::convert<double>("-2e-3");
            CXXTOOLS_UNIT_ASSERT(nearBy(d, -2e-3));
  
            d = cxxtools::convert<double>("-8E-5");
            CXXTOOLS_UNIT_ASSERT(nearBy(d, -8e-5));
  
            d = cxxtools::convert<double>("-3.0e-12");
            CXXTOOLS_UNIT_ASSERT(nearBy(d, -3e-12));
  
            d = cxxtools::convert<double>("-8.5E-23");
            CXXTOOLS_UNIT_ASSERT(nearBy(d, -8.5e-23));
  
            t(3.141592653579893);
            t(0.314);
            t(0.0314);
            t(0.00123);
            t(123456789.55555555);
            t(0);
            t(1);
            t(1.4567e17);
            t(12345);
            t(1.4567e-17);
            t(0.2);
            t(12);
          }
  
  };
  
  cxxtools::unit::RegisterTest<ConvertTest> register_ConvertTest;
  