// Protocol Buffers - Google's data interchange format
// Copyright 2012 Google Inc. All rights reserved.
// http://code.google.com/p/protobuf/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
// * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
// * Redistributions in binary form must reproduce the above
// copyright notice, this list of conditions and the following disclaimer
// in the documentation and/or other materials provided with the
// distribution.
// * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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// from google3/base/stringprintf_unittest.cc
#include <google/protobuf/stubs/stringprintf.h>
#include <cerrno>
#include <string>
#include <google/protobuf/testing/googletest.h>
#include <gtest/gtest.h>
namespace google {
namespace protobuf {
namespace {
TEST(StringPrintfTest, Empty) {
#if 0
// gcc 2.95.3, gcc 4.1.0, and gcc 4.2.2 all warn about this:
// warning: zero-length printf format string.
// so we do not allow them in google3.
EXPECT_EQ("", StringPrintf(""));
#endif
EXPECT_EQ("", StringPrintf("%s", string().c_str()));
EXPECT_EQ("", StringPrintf("%s", ""));
}
TEST(StringPrintfTest, Misc) {
// MSVC does not support $ format specifier.
#if !defined(_MSC_VER)
EXPECT_EQ("123hello w", StringPrintf("%3$d%2$s %1$c", 'w', "hello", 123));
#endif // !_MSC_VER
}
TEST(StringAppendFTest, Empty) {
string value("Hello");
const char* empty = "";
StringAppendF(&value, "%s", empty);
EXPECT_EQ("Hello", value);
}
TEST(StringAppendFTest, EmptyString) {
string value("Hello");
StringAppendF(&value, "%s", "");
EXPECT_EQ("Hello", value);
}
TEST(StringAppendFTest, String) {
string value("Hello");
StringAppendF(&value, " %s", "World");
EXPECT_EQ("Hello World", value);
}
TEST(StringAppendFTest, Int) {
string value("Hello");
StringAppendF(&value, " %d", 123);
EXPECT_EQ("Hello 123", value);
}
TEST(StringPrintfTest, Multibyte) {
// If we are in multibyte mode and feed invalid multibyte sequence,
// StringPrintf should return an empty string instead of running
// out of memory while trying to determine destination buffer size.
// see b/4194543.
char* old_locale = setlocale(LC_CTYPE, NULL);
// Push locale with multibyte mode
setlocale(LC_CTYPE, "en_US.utf8");
const char kInvalidCodePoint[] = "\375\067s";
string value = StringPrintf("%.*s", 3, kInvalidCodePoint);
// In some versions of glibc (e.g. eglibc-2.11.1, aka GRTEv2), snprintf
// returns error given an invalid codepoint. Other versions
// (e.g. eglibc-2.15, aka pre-GRTEv3) emit the codepoint verbatim.
// We test that the output is one of the above.
EXPECT_TRUE(value.empty() || value == kInvalidCodePoint);
// Repeat with longer string, to make sure that the dynamically
// allocated path in StringAppendV is handled correctly.
int n = 2048;
char* buf = new char[n+1];
memset(buf, ' ', n-3);
memcpy(buf + n - 3, kInvalidCodePoint, 4);
value = StringPrintf("%.*s", n, buf);
// See GRTEv2 vs. GRTEv3 comment above.
EXPECT_TRUE(value.empty() || value == buf);
delete[] buf;
setlocale(LC_CTYPE, old_locale);
}
TEST(StringPrintfTest, NoMultibyte) {
// No multibyte handling, but the string contains funny chars.
char* old_locale = setlocale(LC_CTYPE, NULL);
setlocale(LC_CTYPE, "POSIX");
string value = StringPrintf("%.*s", 3, "\375\067s");
setlocale(LC_CTYPE, old_locale);
EXPECT_EQ("\375\067s", value);
}
TEST(StringPrintfTest, DontOverwriteErrno) {
// Check that errno isn't overwritten unless we're printing
// something significantly larger than what people are normally
// printing in their badly written PLOG() statements.
errno = ECHILD;
string value = StringPrintf("Hello, %s!", "World");
EXPECT_EQ(ECHILD, errno);
}
TEST(StringPrintfTest, LargeBuf) {
// Check that the large buffer is handled correctly.
int n = 2048;
char* buf = new char[n+1];
memset(buf, ' ', n);
buf[n] = 0;
string value = StringPrintf("%s", buf);
EXPECT_EQ(buf, value);
delete[] buf;
}
} // anonymous namespace
} // namespace protobuf
} // namespace google