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/*
* Copyright 2018 The WebRTC Project Authors. All rights reserved.
*
* Use of this source code is governed by a BSD-style license
* that can be found in the LICENSE file in the root of the source
* tree. An additional intellectual property rights grant can be found
* in the file PATENTS. All contributing project authors may
* be found in the AUTHORS file in the root of the source tree.
*/
#include "rtc_base/strings/string_builder.h"
#include <string.h>
#include "rtc_base/checks.h"
#include "test/gmock.h"
#include "test/gtest.h"
namespace rtc {
TEST(SimpleStringBuilder, Limit) {
char sb_buf[10];
SimpleStringBuilder sb(sb_buf);
EXPECT_EQ(0u, strlen(sb.str()));
// Test that for a SSB with a buffer size of 10, that we can write 9 chars
// into it.
sb << "012345678"; // 9 characters + '\0'.
EXPECT_EQ(0, strcmp(sb.str(), "012345678"));
}
TEST(SimpleStringBuilder, NumbersAndChars) {
char sb_buf[100];
SimpleStringBuilder sb(sb_buf);
sb << 1 << ':' << 2.1 << ":" << 2.2f << ':' << 78187493520ll << ':'
<< 78187493520ul;
EXPECT_EQ(0, strcmp(sb.str(), "1:2.1:2.2:78187493520:78187493520"));
}
TEST(SimpleStringBuilder, Format) {
char sb_buf[100];
SimpleStringBuilder sb(sb_buf);
sb << "Here we go - ";
sb.AppendFormat("This is a hex formatted value: 0x%08llx", 3735928559ULL);
EXPECT_EQ(0,
strcmp(sb.str(),
"Here we go - This is a hex formatted value: 0xdeadbeef"));
}
TEST(SimpleStringBuilder, StdString) {
char sb_buf[100];
SimpleStringBuilder sb(sb_buf);
std::string str = "does this work?";
sb << str;
EXPECT_EQ(str, sb.str());
}
// These tests are safe to run if we have death test support or if DCHECKs are
// off.
#if (GTEST_HAS_DEATH_TEST && !defined(WEBRTC_ANDROID)) || !RTC_DCHECK_IS_ON
TEST(SimpleStringBuilder, BufferOverrunConstCharP) {
char sb_buf[4];
SimpleStringBuilder sb(sb_buf);
const char* const msg = "This is just too much";
#if RTC_DCHECK_IS_ON
EXPECT_DEATH(sb << msg, "");
#else
sb << msg;
EXPECT_THAT(sb.str(), ::testing::StrEq("Thi"));
#endif
}
TEST(SimpleStringBuilder, BufferOverrunStdString) {
char sb_buf[4];
SimpleStringBuilder sb(sb_buf);
sb << 12;
const std::string msg = "Aw, come on!";
#if RTC_DCHECK_IS_ON
EXPECT_DEATH(sb << msg, "");
#else
sb << msg;
EXPECT_THAT(sb.str(), ::testing::StrEq("12A"));
#endif
}
TEST(SimpleStringBuilder, BufferOverrunInt) {
char sb_buf[4];
SimpleStringBuilder sb(sb_buf);
constexpr int num = -12345;
#if RTC_DCHECK_IS_ON
EXPECT_DEATH(sb << num, "");
#else
sb << num;
// If we run into the end of the buffer, resonable results are either that
// the append has no effect or that it's truncated at the point where the
// buffer ends.
EXPECT_THAT(sb.str(),
::testing::AnyOf(::testing::StrEq(""), ::testing::StrEq("-12")));
#endif
}
TEST(SimpleStringBuilder, BufferOverrunDouble) {
char sb_buf[5];
SimpleStringBuilder sb(sb_buf);
constexpr double num = 123.456;
#if RTC_DCHECK_IS_ON
EXPECT_DEATH(sb << num, "");
#else
sb << num;
EXPECT_THAT(sb.str(),
::testing::AnyOf(::testing::StrEq(""), ::testing::StrEq("123.")));
#endif
}
TEST(SimpleStringBuilder, BufferOverrunConstCharPAlreadyFull) {
char sb_buf[4];
SimpleStringBuilder sb(sb_buf);
sb << 123;
const char* const msg = "This is just too much";
#if RTC_DCHECK_IS_ON
EXPECT_DEATH(sb << msg, "");
#else
sb << msg;
EXPECT_THAT(sb.str(), ::testing::StrEq("123"));
#endif
}
TEST(SimpleStringBuilder, BufferOverrunIntAlreadyFull) {
char sb_buf[4];
SimpleStringBuilder sb(sb_buf);
sb << "xyz";
constexpr int num = -12345;
#if RTC_DCHECK_IS_ON
EXPECT_DEATH(sb << num, "");
#else
sb << num;
EXPECT_THAT(sb.str(), ::testing::StrEq("xyz"));
#endif
}
#endif
////////////////////////////////////////////////////////////////////////////////
// StringBuilder.
TEST(StringBuilder, Limit) {
StringBuilder sb;
EXPECT_EQ(0u, sb.str().size());
sb << "012345678";
EXPECT_EQ(sb.str(), "012345678");
}
TEST(StringBuilder, NumbersAndChars) {
StringBuilder sb;
sb << 1 << ":" << 2.1 << ":" << 2.2f << ":" << 78187493520ll << ":"
<< 78187493520ul;
EXPECT_THAT(sb.str(),
::testing::MatchesRegex("1:2.10*:2.20*:78187493520:78187493520"));
}
TEST(StringBuilder, Format) {
StringBuilder sb;
sb << "Here we go - ";
sb.AppendFormat("This is a hex formatted value: 0x%08llx", 3735928559ULL);
EXPECT_EQ(sb.str(), "Here we go - This is a hex formatted value: 0xdeadbeef");
}
TEST(StringBuilder, StdString) {
StringBuilder sb;
std::string str = "does this work?";
sb << str;
EXPECT_EQ(str, sb.str());
}
TEST(StringBuilder, Release) {
StringBuilder sb;
std::string str =
"This string has to be of a moderate length, or we might "
"run into problems with small object optimizations.";
EXPECT_LT(sizeof(str), str.size());
sb << str;
EXPECT_EQ(str, sb.str());
const char* original_buffer = sb.str().c_str();
std::string moved = sb.Release();
EXPECT_TRUE(sb.str().empty());
EXPECT_EQ(str, moved);
EXPECT_EQ(original_buffer, moved.c_str());
}
TEST(StringBuilder, Reset) {
StringBuilder sb("abc");
sb << "def";
EXPECT_EQ("abcdef", sb.str());
sb.Clear();
EXPECT_TRUE(sb.str().empty());
sb << 123 << "!";
EXPECT_EQ("123!", sb.str());
}
} // namespace rtc
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