third_party/WebKit/Source/wtf/StringExtrasTest.cpp

   1 /*
   2  * Copyright (C) 2012 Apple Inc. All rights reserved.
   3  *
   4  * Redistribution and use in source and binary forms, with or without
   5  * modification, are permitted provided that the following conditions
   6  * are met:
   7  * 1. Redistributions of source code must retain the above copyright
   8  *    notice, this list of conditions and the following disclaimer.
   9  * 2. Redistributions in binary form must reproduce the above copyright
  10  *    notice, this list of conditions and the following disclaimer in the
  11  *    documentation and/or other materials provided with the distribution.
  12  *
  13  * THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
  14  * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
  15  * THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
  16  * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
  17  * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
  18  * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
  19  * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
  20  * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
  21  * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
  22  * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
  23  * THE POSSIBILITY OF SUCH DAMAGE.
  24  */
  25
  26 #include "config.h"
  27 #include "wtf/StringExtras.h"
  28
  29 #include "wtf/text/CString.h"
  30 #include "wtf/text/WTFString.h"
  31 #include <gtest/gtest.h>
  32 #include <limits>
  33
  34 namespace WTF {
  35
  36 template<typename IntegerType> struct PrintfFormatTrait { static const char format[]; };
  37
  38 template<> struct PrintfFormatTrait<short> { static const char format[]; };
  39 const char PrintfFormatTrait<short>::format[] = "%hd";
  40
  41 template<> struct PrintfFormatTrait<int> { static const char format[]; };
  42 const char PrintfFormatTrait<int>::format[] = "%d";
  43
  44 template<> struct PrintfFormatTrait<long> { static const char format[]; };
  45 const char PrintfFormatTrait<long>::format[] = "%ld";
  46
  47 template<> struct PrintfFormatTrait<long long> { static const char format[]; };
  48 #if OS(WIN)
  49 const char PrintfFormatTrait<long long>::format[] = "%I64i";
  50 #else
  51 const char PrintfFormatTrait<long long>::format[] = "%lli";
  52 #endif // OS(WIN)
  53
  54 template<> struct PrintfFormatTrait<unsigned short> { static const char format[]; };
  55 const char PrintfFormatTrait<unsigned short>::format[] = "%hu";
  56
  57 template<> struct PrintfFormatTrait<unsigned> { static const char format[]; };
  58 const char PrintfFormatTrait<unsigned>::format[] = "%u";
  59
  60 template<> struct PrintfFormatTrait<unsigned long> { static const char format[]; };
  61 const char PrintfFormatTrait<unsigned long>::format[] = "%lu";
  62
  63 template<> struct PrintfFormatTrait<unsigned long long> { static const char format[]; };
  64 #if OS(WIN)
  65 const char PrintfFormatTrait<unsigned long long>::format[] = "%I64u";
  66 #else
  67 const char PrintfFormatTrait<unsigned long long>::format[] = "%llu";
  68 #endif // OS(WIN)
  69
  70
  71 // FIXME: use snprintf from StringExtras.h
  72 template<typename IntegerType>
  73 void testBoundaries()
  74 {
  75     const unsigned bufferSize = 256;
  76     Vector<char, bufferSize> buffer;
  77     buffer.resize(bufferSize);
  78
  79     const IntegerType min = std::numeric_limits<IntegerType>::min();
  80     CString minStringData = String::number(min).latin1();
  81     snprintf(buffer.data(), bufferSize, PrintfFormatTrait<IntegerType>::format, min);
  82     EXPECT_STREQ(buffer.data(), minStringData.data());
  83
  84     const IntegerType max = std::numeric_limits<IntegerType>::max();
  85     CString maxStringData = String::number(max).latin1();
  86     snprintf(buffer.data(), bufferSize, PrintfFormatTrait<IntegerType>::format, max);
  87     EXPECT_STREQ(buffer.data(), maxStringData.data());
  88 }
  89
  90 template<typename IntegerType>
  91 void testNumbers()
  92 {
  93     const unsigned bufferSize = 256;
  94     Vector<char, bufferSize> buffer;
  95     buffer.resize(bufferSize);
  96
  97     for (int i = -100; i < 100; ++i) {
  98         const IntegerType number = static_cast<IntegerType>(i);
  99         CString numberStringData = String::number(number).latin1();
 100         snprintf(buffer.data(), bufferSize, PrintfFormatTrait<IntegerType>::format, number);
 101         EXPECT_STREQ(buffer.data(), numberStringData.data());
 102     }
 103 }
 104
 105 TEST(StringExtraTest, IntegerToStringConversionSignedIntegerBoundaries)
 106 {
 107     testBoundaries<short>();
 108     testBoundaries<int>();
 109     testBoundaries<long>();
 110     testBoundaries<long long>();
 111 }
 112
 113 TEST(StringExtraTest, IntegerToStringConversionSignedIntegerRegularNumbers)
 114 {
 115     testNumbers<short>();
 116     testNumbers<int>();
 117     testNumbers<long>();
 118     testNumbers<long long>();
 119 }
 120
 121 TEST(StringExtraTest, IntegerToStringConversionUnsignedIntegerBoundaries)
 122 {
 123     testBoundaries<unsigned short>();
 124     testBoundaries<unsigned>();
 125     testBoundaries<unsigned long>();
 126     testBoundaries<unsigned long long>();
 127 }
 128
 129 TEST(StringExtraTest, IntegerToStringConversionUnsignedIntegerRegularNumbers)
 130 {
 131     testNumbers<unsigned short>();
 132     testNumbers<unsigned>();
 133     testNumbers<unsigned long>();
 134     testNumbers<unsigned long long>();
 135 }
 136
 137 } // namespace WTF