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// Copyright (c) 2010 The Chromium Authors. All rights reserved.
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.
#include "base/basictypes.h"
#include "base/stringprintf.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.
static void StringAppendVTestHelper(std::string* out, const char* 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'));
EXPECT_EQ(L"123hello w", StringPrintf(L"%3d%2ls %1lc", 123, L"hello", 'w'));
}
TEST(StringPrintfTest, StringAppendfEmptyString) {
std::string value("Hello");
StringAppendF(&value, "%s", "");
EXPECT_EQ("Hello", value);
std::wstring valuew(L"Hello");
StringAppendF(&valuew, L"%ls", L"");
EXPECT_EQ(L"Hello", valuew);
}
TEST(StringPrintfTest, StringAppendfString) {
std::string value("Hello");
StringAppendF(&value, " %s", "World");
EXPECT_EQ("Hello World", value);
std::wstring valuew(L"Hello");
StringAppendF(&valuew, L" %ls", L"World");
EXPECT_EQ(L"Hello World", valuew);
}
TEST(StringPrintfTest, StringAppendfInt) {
std::string value("Hello");
StringAppendF(&value, " %d", 123);
EXPECT_EQ("Hello 123", value);
std::wstring valuew(L"Hello");
StringAppendF(&valuew, L" %d", 123);
EXPECT_EQ(L"Hello 123", valuew);
}
// Make sure that lengths exactly around the initial buffer size are handled
// correctly.
TEST(StringPrintfTest, StringPrintfBounds) {
const int kSrcLen = 1026;
char src[kSrcLen];
for (size_t i = 0; i < arraysize(src); i++)
src[i] = 'A';
wchar_t srcw[kSrcLen];
for (size_t i = 0; i < arraysize(srcw); i++)
srcw[i] = 'A';
for (int i = 1; i < 3; i++) {
src[kSrcLen - i] = 0;
std::string out;
SStringPrintf(&out, "%s", src);
EXPECT_STREQ(src, out.c_str());
srcw[kSrcLen - i] = 0;
std::wstring outw;
SStringPrintf(&outw, L"%ls", srcw);
EXPECT_STREQ(srcw, outw.c_str());
}
}
// Test very large sprintfs that will cause the buffer to grow.
TEST(StringPrintfTest, Grow) {
char src[1026];
for (size_t i = 0; i < arraysize(src); i++)
src[i] = 'A';
src[1025] = 0;
const char* fmt = "%sB%sB%sB%sB%sB%sB%s";
std::string out;
SStringPrintf(&out, fmt, src, src, src, src, src, src, src);
const int kRefSize = 320000;
char* ref = new char[kRefSize];
#if defined(OS_WIN)
sprintf_s(ref, kRefSize, fmt, src, src, src, src, src, src, src);
#elif defined(OS_POSIX)
snprintf(ref, kRefSize, fmt, src, src, src, src, src, src, src);
#endif
EXPECT_STREQ(ref, out.c_str());
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 string_util_buf_len = 1024;
// Our buffer should be one larger than the size of StringAppendVT's stack
// buffer.
const int buf_len = string_util_buf_len + 1;
char src[buf_len + 1]; // Need extra one for NULL-terminator.
for (int i = 0; i < buf_len; ++i)
src[i] = 'a';
src[buf_len] = 0;
std::string out;
SStringPrintf(&out, "%s", src);
EXPECT_STREQ(src, out.c_str());
}
// TODO(evanm): what's the proper cross-platform test here?
#if defined(OS_WIN)
// sprintf in Visual Studio fails when given U+FFFF. This tests that the
// failure case is gracefuly handled.
TEST(StringPrintfTest, Invalid) {
wchar_t invalid[2];
invalid[0] = 0xffff;
invalid[1] = 0;
std::wstring out;
SStringPrintf(&out, L"%ls", invalid);
EXPECT_STREQ(L"", out.c_str());
}
#endif
} // namespace base
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