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/trunk/src/google/protobuf/stubs/stringprintf_unittest.cc /trunk/src/google/protobuf/stubs/stringprintf_unittest.cc   r425
  1 // Protocol Buffers - Google's data interchange format
  2 // Copyright 2012 Google Inc. All rights reserved.
  3 // http://code.google.com/p/protobuf/
  4 //
  5 // Redistribution and use in source and binary forms, with or without
  6 // modification, are permitted provided that the following conditions are
  7 // met:
  8 //
  9 // * Redistributions of source code must retain the above copyright
  10 // notice, this list of conditions and the following disclaimer.
  11 // * Redistributions in binary form must reproduce the above
  12 // copyright notice, this list of conditions and the following disclaimer
  13 // in the documentation and/or other materials provided with the
  14 // distribution.
  15 // * Neither the name of Google Inc. nor the names of its
  16 // contributors may be used to endorse or promote products derived from
  17 // this software without specific prior written permission.
  18 //
  19 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
  20 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
  21 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
  22 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
  23 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
  24 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
  25 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
  26 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
  27 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
  28 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
  29 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
  30
  31 // from google3/base/stringprintf_unittest.cc
  32
  33 #include <google/protobuf/stubs/stringprintf.h>
  34
  35 #include <cerrno>
  36 #include <string>
  37
  38 #include <google/protobuf/testing/googletest.h>
  39 #include <gtest/gtest.h>
  40
  41 namespace google {
  42 namespace protobuf {
  43 namespace {
  44
  45 TEST(StringPrintfTest, Empty) {
  46 #if 0
  47 // gcc 2.95.3, gcc 4.1.0, and gcc 4.2.2 all warn about this:
  48 // warning: zero-length printf format string.
  49 // so we do not allow them in google3.
  50 EXPECT_EQ("", StringPrintf(""));
  51 #endif
  52 EXPECT_EQ("", StringPrintf("%s", string().c_str()));
  53 EXPECT_EQ("", StringPrintf("%s", ""));
  54 }
  55
  56 TEST(StringPrintfTest, Misc) {
  57 // MSVC does not support $ format specifier.
  58 #if !defined(COMPILER_MSVC)
  59 EXPECT_EQ("123hello w", StringPrintf("%3$d%2$s %1$c", 'w', "hello", 123));
  60 #endif // !COMPILER_MSVC
  61 }
  62
  63 TEST(StringAppendFTest, Empty) {
  64 string value("Hello");
  65 const char* empty = "";
  66 StringAppendF(&value, "%s", empty);
  67 EXPECT_EQ("Hello", value);
  68 }
  69
  70 TEST(StringAppendFTest, EmptyString) {
  71 string value("Hello");
  72 StringAppendF(&value, "%s", "");
  73 EXPECT_EQ("Hello", value);
  74 }
  75
  76 TEST(StringAppendFTest, String) {
  77 string value("Hello");
  78 StringAppendF(&value, " %s", "World");
  79 EXPECT_EQ("Hello World", value);
  80 }
  81
  82 TEST(StringAppendFTest, Int) {
  83 string value("Hello");
  84 StringAppendF(&value, " %d", 123);
  85 EXPECT_EQ("Hello 123", value);
  86 }
  87
  88 TEST(StringPrintfTest, Multibyte) {
  89 // If we are in multibyte mode and feed invalid multibyte sequence,
  90 // StringPrintf should return an empty string instead of running
  91 // out of memory while trying to determine destination buffer size.
  92 // see b/4194543.
  93
  94 char* old_locale = setlocale(LC_CTYPE, NULL);
  95 // Push locale with multibyte mode
  96 setlocale(LC_CTYPE, "en_US.utf8");
  97
  98 const char kInvalidCodePoint[] = "\375\067s";
  99 string value = StringPrintf("%.*s", 3, kInvalidCodePoint);
  100
  101 // In some versions of glibc (e.g. eglibc-2.11.1, aka GRTEv2), snprintf
  102 // returns error given an invalid codepoint. Other versions
  103 // (e.g. eglibc-2.15, aka pre-GRTEv3) emit the codepoint verbatim.
  104 // We test that the output is one of the above.
  105 EXPECT_TRUE(value.empty() || value == kInvalidCodePoint);
  106
  107 // Repeat with longer string, to make sure that the dynamically
  108 // allocated path in StringAppendV is handled correctly.
  109 int n = 2048;
  110 char* buf = new char[n+1];
  111 memset(buf, ' ', n-3);
  112 memcpy(buf + n - 3, kInvalidCodePoint, 4);
  113 value = StringPrintf("%.*s", n, buf);
  114 // See GRTEv2 vs. GRTEv3 comment above.
  115 EXPECT_TRUE(value.empty() || value == buf);
  116 delete[] buf;
  117
  118 setlocale(LC_CTYPE, old_locale);
  119 }
  120
  121 TEST(StringPrintfTest, NoMultibyte) {
  122 // No multibyte handling, but the string contains funny chars.
  123 char* old_locale = setlocale(LC_CTYPE, NULL);
  124 setlocale(LC_CTYPE, "POSIX");
  125 string value = StringPrintf("%.*s", 3, "\375\067s");
  126 setlocale(LC_CTYPE, old_locale);
  127 EXPECT_EQ("\375\067s", value);
  128 }
  129
  130 TEST(StringPrintfTest, DontOverwriteErrno) {
  131 // Check that errno isn't overwritten unless we're printing
  132 // something significantly larger than what people are normally
  133 // printing in their badly written PLOG() statements.
  134 errno = ECHILD;
  135 string value = StringPrintf("Hello, %s!", "World");
  136 EXPECT_EQ(ECHILD, errno);
  137 }
  138
  139 TEST(StringPrintfTest, LargeBuf) {
  140 // Check that the large buffer is handled correctly.
  141 int n = 2048;
  142 char* buf = new char[n+1];
  143 memset(buf, ' ', n);
  144 buf[n] = 0;
  145 string value = StringPrintf("%s", buf);
  146 EXPECT_EQ(buf, value);
  147 delete[] buf;
  148 }
  149
  150 } // anonymous namespace
  151 } // namespace protobuf
  152 } // namespace google
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