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// Copyright 2013 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/strings/stringprintf.h"
#include <errno.h>
#include <stddef.h>
#include "build/build_config.h"
#include "testing/gtest/include/gtest/gtest.h"
namespace base {
namespace {
// A helper for the StringAppendV test that follows.
//
// Just forwards its args to StringAppendV.
template <class CharT>
static void StringAppendVTestHelper(std::basic_string<CharT>* out,
const CharT* format,
...) {
va_list ap;
va_start(ap, format);
StringAppendV(out, format, ap);
va_end(ap);
}
} // namespace
TEST(StringPrintfTest, StringPrintfEmpty) {
EXPECT_EQ("", StringPrintf("%s", ""));
}
TEST(StringPrintfTest, StringPrintfMisc) {
EXPECT_EQ("123hello w", StringPrintf("%3d%2s %1c", 123, "hello", 'w'));
}
TEST(StringPrintfTest, StringAppendfEmptyString) {
std::string value("Hello");
StringAppendF(&value, "%s", "");
EXPECT_EQ("Hello", value);
}
TEST(StringPrintfTest, StringAppendfString) {
std::string value("Hello");
StringAppendF(&value, " %s", "World");
EXPECT_EQ("Hello World", value);
}
TEST(StringPrintfTest, StringAppendfInt) {
std::string value("Hello");
StringAppendF(&value, " %d", 123);
EXPECT_EQ("Hello 123", value);
}
// Make sure that lengths exactly around the initial buffer size are handled
// correctly.
TEST(StringPrintfTest, StringPrintfBounds) {
const int kSrcLen = 1026;
char src[kSrcLen];
std::fill_n(src, kSrcLen, 'A');
wchar_t srcw[kSrcLen];
std::fill_n(srcw, kSrcLen, 'A');
char16_t src16[kSrcLen];
std::fill_n(src16, kSrcLen, 'A');
for (int i = 1; i < 3; i++) {
src[kSrcLen - i] = 0;
std::string out;
EXPECT_EQ(src, StringPrintf("%s", src));
}
}
// Test very large sprintfs that will cause the buffer to grow.
TEST(StringPrintfTest, Grow) {
char src[1026];
for (auto& i : src)
i = 'A';
src[1025] = 0;
const char fmt[] = "%sB%sB%sB%sB%sB%sB%s";
const int kRefSize = 320000;
char* ref = new char[kRefSize];
#if BUILDFLAG(IS_WIN)
sprintf_s(ref, kRefSize, fmt, src, src, src, src, src, src, src);
#elif BUILDFLAG(IS_POSIX) || BUILDFLAG(IS_FUCHSIA)
snprintf(ref, kRefSize, fmt, src, src, src, src, src, src, src);
#endif
EXPECT_EQ(ref, StringPrintf(fmt, src, src, src, src, src, src, src));
delete[] ref;
}
TEST(StringPrintfTest, StringAppendV) {
std::string out;
StringAppendVTestHelper(&out, "%d foo %s", 1, "bar");
EXPECT_EQ("1 foo bar", out);
}
// Test the boundary condition for the size of the string_util's
// internal buffer.
TEST(StringPrintfTest, GrowBoundary) {
const int kStringUtilBufLen = 1024;
// Our buffer should be one larger than the size of StringAppendVT's stack
// buffer.
// And need extra one for NULL-terminator.
const int kBufLen = kStringUtilBufLen + 1 + 1;
char src[kBufLen];
for (int i = 0; i < kBufLen - 1; ++i)
src[i] = 'a';
src[kBufLen - 1] = 0;
EXPECT_EQ(src, StringPrintf("%s", src));
}
// Test that StringPrintf and StringAppendV do not change errno.
TEST(StringPrintfTest, StringPrintfErrno) {
errno = 1;
EXPECT_EQ("", StringPrintf("%s", ""));
EXPECT_EQ(1, errno);
std::string out;
StringAppendVTestHelper(&out, "%d foo %s", 1, "bar");
EXPECT_EQ(1, errno);
}
} // namespace base
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