libs/lexical_cast/test/lexical_cast_empty_input_test.cpp

   1 //  Unit test for boost::lexical_cast.
   2 //
   3 //  See http://www.boost.org for most recent version, including documentation.
   4 //
   5 //  Copyright Antony Polukhin, 2011.
   6 //
   7 //  Distributed under the Boost
   8 //  Software License, Version 1.0. (See accompanying file
   9 //  LICENSE_1_0.txt or copy at http://www.boost.org/LICENSE_1_0.txt).
  10
  11 #include <boost/config.hpp>
  12
  13 #if defined(__INTEL_COMPILER)
  14 #pragma warning(disable: 193 383 488 981 1418 1419)
  15 #elif defined(BOOST_MSVC)
  16 #pragma warning(disable: 4097 4100 4121 4127 4146 4244 4245 4511 4512 4701 4800)
  17 #endif
  18
  19 #include <boost/lexical_cast.hpp>
  20 #include <boost/test/unit_test.hpp>
  21 #include <boost/range/iterator_range.hpp>
  22
  23 using namespace boost;
  24
  25 #if defined(BOOST_NO_STRINGSTREAM) || defined(BOOST_NO_STD_WSTRING)
  26 #define BOOST_LCAST_NO_WCHAR_T
  27 #endif
  28
  29 template <class T>
  30 void do_test_on_empty_input(T& v)
  31 {
  32     BOOST_CHECK_THROW(lexical_cast<int>(v), bad_lexical_cast);
  33     BOOST_CHECK_THROW(lexical_cast<float>(v), bad_lexical_cast);
  34     BOOST_CHECK_THROW(lexical_cast<double>(v), bad_lexical_cast);
  35 #ifndef BOOST_MATH_NO_LONG_DOUBLE_MATH_FUNCTIONS
  36     BOOST_CHECK_THROW(lexical_cast<long double>(v), bad_lexical_cast);
  37 #endif
  38     BOOST_CHECK_THROW(lexical_cast<unsigned int>(v), bad_lexical_cast);
  39     BOOST_CHECK_THROW(lexical_cast<unsigned short>(v), bad_lexical_cast);
  40 #if defined(BOOST_HAS_LONG_LONG)
  41     BOOST_CHECK_THROW(lexical_cast<boost::ulong_long_type>(v), bad_lexical_cast);
  42     BOOST_CHECK_THROW(lexical_cast<boost::long_long_type>(v), bad_lexical_cast);
  43 #elif defined(BOOST_HAS_MS_INT64)
  44     BOOST_CHECK_THROW(lexical_cast<unsigned __int64>(v), bad_lexical_cast);
  45     BOOST_CHECK_THROW(lexical_cast<__int64>(v), bad_lexical_cast);
  46 #endif
  47 }
  48
  49 void test_empty_iterator_range()
  50 {
  51
  52     boost::iterator_range<char*> v;
  53     do_test_on_empty_input(v);
  54     BOOST_CHECK_EQUAL(lexical_cast<std::string>(v), std::string());
  55     BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
  56     BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
  57     BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
  58
  59     boost::iterator_range<const char*> cv;
  60     do_test_on_empty_input(cv);
  61     BOOST_CHECK_EQUAL(lexical_cast<std::string>(cv), std::string());
  62     BOOST_CHECK_THROW(lexical_cast<char>(cv), bad_lexical_cast);
  63     BOOST_CHECK_THROW(lexical_cast<unsigned char>(cv), bad_lexical_cast);
  64     BOOST_CHECK_THROW(lexical_cast<signed char>(cv), bad_lexical_cast);
  65
  66     const boost::iterator_range<const char*> ccv;
  67     do_test_on_empty_input(ccv);
  68     BOOST_CHECK_EQUAL(lexical_cast<std::string>(ccv), std::string());
  69     BOOST_CHECK_THROW(lexical_cast<char>(ccv), bad_lexical_cast);
  70     BOOST_CHECK_THROW(lexical_cast<unsigned char>(ccv), bad_lexical_cast);
  71     BOOST_CHECK_THROW(lexical_cast<signed char>(ccv), bad_lexical_cast);
  72 }
  73
  74 void test_empty_string()
  75 {
  76     std::string v;
  77     do_test_on_empty_input(v);
  78     BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
  79     BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
  80     BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
  81
  82 #ifndef BOOST_LCAST_NO_WCHAR_T
  83     std::wstring vw;
  84     do_test_on_empty_input(vw);
  85     BOOST_CHECK_THROW(lexical_cast<wchar_t>(vw), bad_lexical_cast);
  86 #endif
  87
  88 // Currently, no compiler and STL library fully support char16_t and char32_t
  89 //#ifndef BOOST_NO_CXX11_CHAR16_T
  90 //    std::basic_string<char16_t> v16w;
  91 //    do_test_on_empty_input(v16w);
  92 //    BOOST_CHECK_THROW(lexical_cast<char16_t>(v16w), bad_lexical_cast);
  93 //#endif
  94 //#ifndef BOOST_NO_CXX11_CHAR32_T
  95 //    std::basic_string<char32_t> v32w;
  96 //    do_test_on_empty_input(v32w);
  97 //    BOOST_CHECK_THROW(lexical_cast<char32_t>(v32w), bad_lexical_cast);
  98 //#endif
  99 }
 100
 101 struct Escape
 102 {
 103     Escape(const std::string& s)
 104         : str_(s)
 105     {}
 106
 107     std::string str_;
 108 };
 109
 110 inline std::ostream& operator<< (std::ostream& o, const Escape& rhs)
 111 {
 112     return o << rhs.str_;
 113 }
 114
 115 void test_empty_user_class()
 116 {
 117     Escape v("");
 118     do_test_on_empty_input(v);
 119     BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
 120     BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
 121     BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
 122 }
 123
 124 namespace std {
 125 inline std::ostream & operator<<(std::ostream & out, const std::vector<long> & v)
 126 {
 127     std::ostream_iterator<long> it(out);
 128     std::copy(v.begin(), v.end(), it);
 129     assert(out);
 130     return out;
 131 }
 132 }
 133
 134 void test_empty_vector()
 135 {
 136     std::vector<long> v;
 137     do_test_on_empty_input(v);
 138     BOOST_CHECK_THROW(lexical_cast<char>(v), bad_lexical_cast);
 139     BOOST_CHECK_THROW(lexical_cast<unsigned char>(v), bad_lexical_cast);
 140     BOOST_CHECK_THROW(lexical_cast<signed char>(v), bad_lexical_cast);
 141 }
 142
 143
 144 struct my_string {
 145     friend std::ostream &operator<<(std::ostream& sout, my_string const&/* st*/) {
 146             return sout << "";
 147     }
 148 };
 149
 150 void test_empty_zero_terminated_string()
 151 {
 152     my_string st;
 153     BOOST_CHECK_EQUAL(boost::lexical_cast<std::string>(st), std::string());;
 154 }
 155
 156 unit_test::test_suite *init_unit_test_suite(int, char *[])
 157 {
 158     unit_test::test_suite *suite =
 159         BOOST_TEST_SUITE("lexical_cast. Empty input unit test");
 160     suite->add(BOOST_TEST_CASE(&test_empty_iterator_range));
 161     suite->add(BOOST_TEST_CASE(&test_empty_string));
 162     suite->add(BOOST_TEST_CASE(&test_empty_user_class));
 163     suite->add(BOOST_TEST_CASE(&test_empty_vector));
 164     suite->add(BOOST_TEST_CASE(&test_empty_zero_terminated_string));
 165
 166     return suite;
 167 }