folly/test/StringTest.cpp

   1 /*
   2  * Copyright 2014 Facebook, Inc.
   3  *
   4  * Licensed under the Apache License, Version 2.0 (the "License");
   5  * you may not use this file except in compliance with the License.
   6  * You may obtain a copy of the License at
   7  *
   8  *   http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 #include <folly/String.h>
  18
  19 #include <random>
  20 #include <boost/algorithm/string.hpp>
  21 #include <gtest/gtest.h>
  22
  23 #include <folly/Benchmark.h>
  24
  25 using namespace folly;
  26 using namespace std;
  27
  28 TEST(StringPrintf, BasicTest) {
  29   EXPECT_EQ("abc", stringPrintf("%s", "abc"));
  30   EXPECT_EQ("abc", stringPrintf("%sbc", "a"));
  31   EXPECT_EQ("abc", stringPrintf("a%sc", "b"));
  32   EXPECT_EQ("abc", stringPrintf("ab%s", "c"));
  33
  34   EXPECT_EQ("abc", stringPrintf("abc"));
  35 }
  36
  37 TEST(StringPrintf, NumericFormats) {
  38   EXPECT_EQ("12", stringPrintf("%d", 12));
  39   EXPECT_EQ("5000000000", stringPrintf("%ld", 5000000000UL));
  40   EXPECT_EQ("5000000000", stringPrintf("%ld", 5000000000L));
  41   EXPECT_EQ("-5000000000", stringPrintf("%ld", -5000000000L));
  42   EXPECT_EQ("-1", stringPrintf("%d", 0xffffffff));
  43   EXPECT_EQ("-1", stringPrintf("%ld", 0xffffffffffffffff));
  44   EXPECT_EQ("-1", stringPrintf("%ld", 0xffffffffffffffffUL));
  45
  46   EXPECT_EQ("7.7", stringPrintf("%1.1f", 7.7));
  47   EXPECT_EQ("7.7", stringPrintf("%1.1lf", 7.7));
  48   EXPECT_EQ("7.70000000000000018",
  49             stringPrintf("%.17f", 7.7));
  50   EXPECT_EQ("7.70000000000000018",
  51             stringPrintf("%.17lf", 7.7));
  52 }
  53
  54 TEST(StringPrintf, Appending) {
  55   string s;
  56   stringAppendf(&s, "a%s", "b");
  57   stringAppendf(&s, "%c", 'c');
  58   EXPECT_EQ(s, "abc");
  59   stringAppendf(&s, " %d", 123);
  60   EXPECT_EQ(s, "abc 123");
  61 }
  62
  63 TEST(StringPrintf, VariousSizes) {
  64   // Test a wide variety of output sizes
  65   for (int i = 0; i < 100; ++i) {
  66     string expected(i + 1, 'a');
  67     EXPECT_EQ("X" + expected + "X", stringPrintf("X%sX", expected.c_str()));
  68   }
  69
  70   EXPECT_EQ("abc12345678910111213141516171819202122232425xyz",
  71             stringPrintf("abc%d%d%d%d%d%d%d%d%d%d%d%d%d%d"
  72                          "%d%d%d%d%d%d%d%d%d%d%dxyz",
  73                          1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16,
  74                          17, 18, 19, 20, 21, 22, 23, 24, 25));
  75 }
  76
  77 TEST(StringPrintf, oldStringPrintfTests) {
  78   EXPECT_EQ(string("a/b/c/d"),
  79             stringPrintf("%s/%s/%s/%s", "a", "b", "c", "d"));
  80
  81   EXPECT_EQ(string("    5    10"),
  82             stringPrintf("%5d %5d", 5, 10));
  83
  84   // check printing w/ a big buffer
  85   for (int size = (1 << 8); size <= (1 << 15); size <<= 1) {
  86     string a(size, 'z');
  87     string b = stringPrintf("%s", a.c_str());
  88     EXPECT_EQ(a.size(), b.size());
  89   }
  90 }
  91
  92 TEST(StringPrintf, oldStringAppendf) {
  93   string s = "hello";
  94   stringAppendf(&s, "%s/%s/%s/%s", "a", "b", "c", "d");
  95   EXPECT_EQ(string("helloa/b/c/d"), s);
  96 }
  97
  98 BENCHMARK(new_stringPrintfSmall, iters) {
  99   for (int64_t i = 0; i < iters; ++i) {
 100     int32_t x = int32_t(i);
 101     int32_t y = int32_t(i + 1);
 102     string s =
 103       stringPrintf("msg msg msg msg msg msg msg msg:  %d, %d, %s",
 104                    x, y, "hello");
 105   }
 106 }
 107
 108 TEST(Escape, cEscape) {
 109   EXPECT_EQ("hello world", cEscape<std::string>("hello world"));
 110   EXPECT_EQ("hello \\\\world\\\" goodbye",
 111             cEscape<std::string>("hello \\world\" goodbye"));
 112   EXPECT_EQ("hello\\nworld", cEscape<std::string>("hello\nworld"));
 113   EXPECT_EQ("hello\\377\\376", cEscape<std::string>("hello\xff\xfe"));
 114 }
 115
 116 TEST(Escape, cUnescape) {
 117   EXPECT_EQ("hello world", cUnescape<std::string>("hello world"));
 118   EXPECT_EQ("hello \\world\" goodbye",
 119             cUnescape<std::string>("hello \\\\world\\\" goodbye"));
 120   EXPECT_EQ("hello\nworld", cUnescape<std::string>("hello\\nworld"));
 121   EXPECT_EQ("hello\nworld", cUnescape<std::string>("hello\\012world"));
 122   EXPECT_EQ("hello\nworld", cUnescape<std::string>("hello\\x0aworld"));
 123   EXPECT_EQ("hello\xff\xfe", cUnescape<std::string>("hello\\377\\376"));
 124   EXPECT_EQ("hello\xff\xfe", cUnescape<std::string>("hello\\xff\\xfe"));
 125
 126   EXPECT_THROW({cUnescape<std::string>("hello\\");},
 127                std::invalid_argument);
 128   EXPECT_THROW({cUnescape<std::string>("hello\\x");},
 129                std::invalid_argument);
 130   EXPECT_THROW({cUnescape<std::string>("hello\\q");},
 131                std::invalid_argument);
 132 }
 133
 134 TEST(Escape, uriEscape) {
 135   EXPECT_EQ("hello%2c%20%2fworld", uriEscape<std::string>("hello, /world"));
 136   EXPECT_EQ("hello%2c%20/world", uriEscape<std::string>("hello, /world",
 137                                                         UriEscapeMode::PATH));
 138   EXPECT_EQ("hello%2c+%2fworld", uriEscape<std::string>("hello, /world",
 139                                                         UriEscapeMode::QUERY));
 140 }
 141
 142 TEST(Escape, uriUnescape) {
 143   EXPECT_EQ("hello, /world", uriUnescape<std::string>("hello, /world"));
 144   EXPECT_EQ("hello, /world", uriUnescape<std::string>("hello%2c%20%2fworld"));
 145   EXPECT_EQ("hello,+/world", uriUnescape<std::string>("hello%2c+%2fworld"));
 146   EXPECT_EQ("hello, /world", uriUnescape<std::string>("hello%2c+%2fworld",
 147                                                       UriEscapeMode::QUERY));
 148   EXPECT_EQ("hello/", uriUnescape<std::string>("hello%2f"));
 149   EXPECT_EQ("hello/", uriUnescape<std::string>("hello%2F"));
 150   EXPECT_THROW({uriUnescape<std::string>("hello%");},
 151                std::invalid_argument);
 152   EXPECT_THROW({uriUnescape<std::string>("hello%2");},
 153                std::invalid_argument);
 154   EXPECT_THROW({uriUnescape<std::string>("hello%2g");},
 155                std::invalid_argument);
 156 }
 157
 158 namespace {
 159 void expectPrintable(StringPiece s) {
 160   for (char c : s) {
 161     EXPECT_LE(32, c);
 162     EXPECT_GE(127, c);
 163   }
 164 }
 165 }  // namespace
 166
 167 TEST(Escape, uriEscapeAllCombinations) {
 168   char c[3];
 169   c[2] = '\0';
 170   StringPiece in(c, 2);
 171   fbstring tmp;
 172   fbstring out;
 173   for (int i = 0; i < 256; ++i) {
 174     c[0] = i;
 175     for (int j = 0; j < 256; ++j) {
 176       c[1] = j;
 177       tmp.clear();
 178       out.clear();
 179       uriEscape(in, tmp);
 180       expectPrintable(tmp);
 181       uriUnescape(tmp, out);
 182       EXPECT_EQ(in, out);
 183     }
 184   }
 185 }
 186
 187 namespace {
 188 bool isHex(int v) {
 189   return ((v >= '0' && v <= '9') ||
 190           (v >= 'A' && v <= 'F') ||
 191           (v >= 'a' && v <= 'f'));
 192 }
 193 }  // namespace
 194
 195 TEST(Escape, uriUnescapePercentDecoding) {
 196   char c[4] = {'%', '\0', '\0', '\0'};
 197   StringPiece in(c, 3);
 198   fbstring out;
 199   unsigned int expected = 0;
 200   for (int i = 0; i < 256; ++i) {
 201     c[1] = i;
 202     for (int j = 0; j < 256; ++j) {
 203       c[2] = j;
 204       if (isHex(i) && isHex(j)) {
 205         out.clear();
 206         uriUnescape(in, out);
 207         EXPECT_EQ(1, out.size());
 208         EXPECT_EQ(1, sscanf(c + 1, "%x", &expected));
 209         unsigned char v = out[0];
 210         EXPECT_EQ(expected, v);
 211       } else {
 212         EXPECT_THROW({uriUnescape(in, out);}, std::invalid_argument);
 213       }
 214     }
 215   }
 216 }
 217
 218 namespace {
 219 fbstring cbmString;
 220 fbstring cbmEscapedString;
 221 fbstring cEscapedString;
 222 fbstring cUnescapedString;
 223 const size_t kCBmStringLength = 64 << 10;
 224 const uint32_t kCPrintablePercentage = 90;
 225
 226 fbstring uribmString;
 227 fbstring uribmEscapedString;
 228 fbstring uriEscapedString;
 229 fbstring uriUnescapedString;
 230 const size_t kURIBmStringLength = 256;
 231 const uint32_t kURIPassThroughPercentage = 50;
 232
 233 void initBenchmark() {
 234   std::mt19937 rnd;
 235
 236   // C escape
 237   std::uniform_int_distribution<uint32_t> printable(32, 126);
 238   std::uniform_int_distribution<uint32_t> nonPrintable(0, 160);
 239   std::uniform_int_distribution<uint32_t> percentage(0, 99);
 240
 241   cbmString.reserve(kCBmStringLength);
 242   for (size_t i = 0; i < kCBmStringLength; ++i) {
 243     unsigned char c;
 244     if (percentage(rnd) < kCPrintablePercentage) {
 245       c = printable(rnd);
 246     } else {
 247       c = nonPrintable(rnd);
 248       // Generate characters in both non-printable ranges:
 249       // 0..31 and 127..255
 250       if (c >= 32) {
 251         c += (126 - 32) + 1;
 252       }
 253     }
 254     cbmString.push_back(c);
 255   }
 256
 257   cbmEscapedString = cEscape<fbstring>(cbmString);
 258
 259   // URI escape
 260   std::uniform_int_distribution<uint32_t> passthrough('a', 'z');
 261   std::string encodeChars = " ?!\"',+[]";
 262   std::uniform_int_distribution<uint32_t> encode(0, encodeChars.size() - 1);
 263
 264   uribmString.reserve(kURIBmStringLength);
 265   for (size_t i = 0; i < kURIBmStringLength; ++i) {
 266     unsigned char c;
 267     if (percentage(rnd) < kURIPassThroughPercentage) {
 268       c = passthrough(rnd);
 269     } else {
 270       c = encodeChars[encode(rnd)];
 271     }
 272     uribmString.push_back(c);
 273   }
 274
 275   uribmEscapedString = uriEscape<fbstring>(uribmString);
 276 }
 277
 278 BENCHMARK(BM_cEscape, iters) {
 279   while (iters--) {
 280     cEscapedString = cEscape<fbstring>(cbmString);
 281     doNotOptimizeAway(cEscapedString.size());
 282   }
 283 }
 284
 285 BENCHMARK(BM_cUnescape, iters) {
 286   while (iters--) {
 287     cUnescapedString = cUnescape<fbstring>(cbmEscapedString);
 288     doNotOptimizeAway(cUnescapedString.size());
 289   }
 290 }
 291
 292 BENCHMARK(BM_uriEscape, iters) {
 293   while (iters--) {
 294     uriEscapedString = uriEscape<fbstring>(uribmString);
 295     doNotOptimizeAway(uriEscapedString.size());
 296   }
 297 }
 298
 299 BENCHMARK(BM_uriUnescape, iters) {
 300   while (iters--) {
 301     uriUnescapedString = uriUnescape<fbstring>(uribmEscapedString);
 302     doNotOptimizeAway(uriUnescapedString.size());
 303   }
 304 }
 305
 306 }  // namespace
 307
 308 namespace {
 309
 310 double pow2(int exponent) {
 311   return double(int64_t(1) << exponent);
 312 }
 313
 314 }  // namespace
 315 struct PrettyTestCase{
 316   std::string prettyString;
 317   double realValue;
 318   PrettyType prettyType;
 319 };
 320
 321 PrettyTestCase prettyTestCases[] =
 322 {
 323   {string("8.53e+07 s "), 85.3e6,  PRETTY_TIME},
 324   {string("8.53e+07 s "), 85.3e6,  PRETTY_TIME},
 325   {string("85.3 ms"), 85.3e-3,  PRETTY_TIME},
 326   {string("85.3 us"), 85.3e-6,  PRETTY_TIME},
 327   {string("85.3 ns"), 85.3e-9,  PRETTY_TIME},
 328   {string("85.3 ps"), 85.3e-12,  PRETTY_TIME},
 329   {string("8.53e-14 s "), 85.3e-15,  PRETTY_TIME},
 330
 331   {string("0 s "), 0,  PRETTY_TIME},
 332   {string("1 s "), 1.0,  PRETTY_TIME},
 333   {string("1 ms"), 1.0e-3,  PRETTY_TIME},
 334   {string("1 us"), 1.0e-6,  PRETTY_TIME},
 335   {string("1 ns"), 1.0e-9,  PRETTY_TIME},
 336   {string("1 ps"), 1.0e-12,  PRETTY_TIME},
 337
 338   // check bytes printing
 339   {string("853 B "), 853.,  PRETTY_BYTES},
 340   {string("833 kB"), 853.e3,  PRETTY_BYTES},
 341   {string("813.5 MB"), 853.e6,  PRETTY_BYTES},
 342   {string("7.944 GB"), 8.53e9,  PRETTY_BYTES},
 343   {string("794.4 GB"), 853.e9,  PRETTY_BYTES},
 344   {string("775.8 TB"), 853.e12,  PRETTY_BYTES},
 345
 346   {string("0 B "), 0,  PRETTY_BYTES},
 347   {string("1 B "), pow2(0),  PRETTY_BYTES},
 348   {string("1 kB"), pow2(10),  PRETTY_BYTES},
 349   {string("1 MB"), pow2(20),  PRETTY_BYTES},
 350   {string("1 GB"), pow2(30),  PRETTY_BYTES},
 351   {string("1 TB"), pow2(40),  PRETTY_BYTES},
 352
 353   {string("853 B  "), 853.,  PRETTY_BYTES_IEC},
 354   {string("833 KiB"), 853.e3,  PRETTY_BYTES_IEC},
 355   {string("813.5 MiB"), 853.e6,  PRETTY_BYTES_IEC},
 356   {string("7.944 GiB"), 8.53e9,  PRETTY_BYTES_IEC},
 357   {string("794.4 GiB"), 853.e9,  PRETTY_BYTES_IEC},
 358   {string("775.8 TiB"), 853.e12,  PRETTY_BYTES_IEC},
 359
 360   {string("0 B  "), 0,  PRETTY_BYTES_IEC},
 361   {string("1 B  "), pow2(0),  PRETTY_BYTES_IEC},
 362   {string("1 KiB"), pow2(10),  PRETTY_BYTES_IEC},
 363   {string("1 MiB"), pow2(20),  PRETTY_BYTES_IEC},
 364   {string("1 GiB"), pow2(30),  PRETTY_BYTES_IEC},
 365   {string("1 TiB"), pow2(40),  PRETTY_BYTES_IEC},
 366
 367   // check bytes metric printing
 368   {string("853 B "), 853.,  PRETTY_BYTES_METRIC},
 369   {string("853 kB"), 853.e3,  PRETTY_BYTES_METRIC},
 370   {string("853 MB"), 853.e6,  PRETTY_BYTES_METRIC},
 371   {string("8.53 GB"), 8.53e9,  PRETTY_BYTES_METRIC},
 372   {string("853 GB"), 853.e9,  PRETTY_BYTES_METRIC},
 373   {string("853 TB"), 853.e12,  PRETTY_BYTES_METRIC},
 374
 375   {string("0 B "), 0,  PRETTY_BYTES_METRIC},
 376   {string("1 B "), 1.0,  PRETTY_BYTES_METRIC},
 377   {string("1 kB"), 1.0e+3,  PRETTY_BYTES_METRIC},
 378   {string("1 MB"), 1.0e+6,  PRETTY_BYTES_METRIC},
 379
 380   {string("1 GB"), 1.0e+9,  PRETTY_BYTES_METRIC},
 381   {string("1 TB"), 1.0e+12,  PRETTY_BYTES_METRIC},
 382
 383   // check metric-units (powers of 1000) printing
 384   {string("853  "), 853.,  PRETTY_UNITS_METRIC},
 385   {string("853 k"), 853.e3,  PRETTY_UNITS_METRIC},
 386   {string("853 M"), 853.e6,  PRETTY_UNITS_METRIC},
 387   {string("8.53 bil"), 8.53e9,  PRETTY_UNITS_METRIC},
 388   {string("853 bil"), 853.e9,  PRETTY_UNITS_METRIC},
 389   {string("853 tril"), 853.e12,  PRETTY_UNITS_METRIC},
 390
 391   // check binary-units (powers of 1024) printing
 392   {string("0  "), 0,  PRETTY_UNITS_BINARY},
 393   {string("1  "), pow2(0),  PRETTY_UNITS_BINARY},
 394   {string("1 k"), pow2(10),  PRETTY_UNITS_BINARY},
 395   {string("1 M"), pow2(20),  PRETTY_UNITS_BINARY},
 396   {string("1 G"), pow2(30),  PRETTY_UNITS_BINARY},
 397   {string("1 T"), pow2(40),  PRETTY_UNITS_BINARY},
 398
 399   {string("1023  "), pow2(10) - 1,  PRETTY_UNITS_BINARY},
 400   {string("1024 k"), pow2(20) - 1,  PRETTY_UNITS_BINARY},
 401   {string("1024 M"), pow2(30) - 1,  PRETTY_UNITS_BINARY},
 402   {string("1024 G"), pow2(40) - 1,  PRETTY_UNITS_BINARY},
 403
 404   {string("0   "), 0,  PRETTY_UNITS_BINARY_IEC},
 405   {string("1   "), pow2(0),  PRETTY_UNITS_BINARY_IEC},
 406   {string("1 Ki"), pow2(10),  PRETTY_UNITS_BINARY_IEC},
 407   {string("1 Mi"), pow2(20),  PRETTY_UNITS_BINARY_IEC},
 408   {string("1 Gi"), pow2(30),  PRETTY_UNITS_BINARY_IEC},
 409   {string("1 Ti"), pow2(40),  PRETTY_UNITS_BINARY_IEC},
 410
 411   {string("1023   "), pow2(10) - 1,  PRETTY_UNITS_BINARY_IEC},
 412   {string("1024 Ki"), pow2(20) - 1,  PRETTY_UNITS_BINARY_IEC},
 413   {string("1024 Mi"), pow2(30) - 1,  PRETTY_UNITS_BINARY_IEC},
 414   {string("1024 Gi"), pow2(40) - 1,  PRETTY_UNITS_BINARY_IEC},
 415
 416   //check border SI cases
 417
 418   {string("1 Y"), 1e24,  PRETTY_SI},
 419   {string("10 Y"), 1e25,  PRETTY_SI},
 420   {string("1 y"), 1e-24,  PRETTY_SI},
 421   {string("10 y"), 1e-23,  PRETTY_SI},
 422
 423   // check that negative values work
 424   {string("-85.3 s "), -85.3,  PRETTY_TIME},
 425   {string("-85.3 ms"), -85.3e-3,  PRETTY_TIME},
 426   {string("-85.3 us"), -85.3e-6,  PRETTY_TIME},
 427   {string("-85.3 ns"), -85.3e-9,  PRETTY_TIME},
 428   // end of test
 429   {string("endoftest"), 0, PRETTY_NUM_TYPES}
 430 };
 431
 432 TEST(PrettyPrint, Basic) {
 433   for (int i = 0; prettyTestCases[i].prettyType != PRETTY_NUM_TYPES; ++i){
 434     const PrettyTestCase& prettyTest = prettyTestCases[i];
 435     EXPECT_EQ(prettyTest.prettyString,
 436               prettyPrint(prettyTest.realValue, prettyTest.prettyType));
 437   }
 438 }
 439
 440 TEST(PrettyToDouble, Basic) {
 441   // check manually created tests
 442   for (int i = 0; prettyTestCases[i].prettyType != PRETTY_NUM_TYPES; ++i){
 443     PrettyTestCase testCase = prettyTestCases[i];
 444     PrettyType formatType = testCase.prettyType;
 445     double x = testCase.realValue;
 446     std::string testString = testCase.prettyString;
 447     double recoveredX;
 448     try{
 449       recoveredX = prettyToDouble(testString, formatType);
 450     } catch (std::range_error &ex){
 451       EXPECT_TRUE(false);
 452     }
 453     double relativeError = fabs(x) < 1e-5 ? (x-recoveredX) :
 454                                             (x - recoveredX) / x;
 455     EXPECT_NEAR(0, relativeError, 1e-3);
 456   }
 457
 458   // checks for compatibility with prettyPrint over the whole parameter space
 459   for (int i = 0 ; i < PRETTY_NUM_TYPES; ++i){
 460     PrettyType formatType = static_cast<PrettyType>(i);
 461     for (double x = 1e-18; x < 1e40; x *= 1.9){
 462       bool addSpace = static_cast<PrettyType> (i) == PRETTY_SI;
 463       for (int it = 0; it < 2; ++it, addSpace = true){
 464         double recoveredX;
 465         try{
 466           recoveredX = prettyToDouble(prettyPrint(x, formatType, addSpace),
 467                                              formatType);
 468         } catch (std::range_error &ex){
 469           EXPECT_TRUE(false);
 470         }
 471         double relativeError = (x - recoveredX) / x;
 472         EXPECT_NEAR(0, relativeError, 1e-3);
 473       }
 474     }
 475   }
 476
 477   // check for incorrect values
 478   EXPECT_THROW(prettyToDouble("10Mx", PRETTY_SI), std::range_error);
 479   EXPECT_THROW(prettyToDouble("10 Mx", PRETTY_SI), std::range_error);
 480   EXPECT_THROW(prettyToDouble("10 M x", PRETTY_SI), std::range_error);
 481
 482   StringPiece testString = "10Mx";
 483   EXPECT_DOUBLE_EQ(prettyToDouble(&testString, PRETTY_UNITS_METRIC), 10e6);
 484   EXPECT_EQ(testString, "x");
 485 }
 486
 487 TEST(PrettyPrint, HexDump) {
 488   std::string a("abc\x00\x02\xa0", 6);  // embedded NUL
 489   EXPECT_EQ(
 490     "00000000  61 62 63 00 02 a0                                 "
 491     "|abc...          |\n",
 492     hexDump(a.data(), a.size()));
 493
 494   a = "abcdefghijklmnopqrstuvwxyz";
 495   EXPECT_EQ(
 496     "00000000  61 62 63 64 65 66 67 68  69 6a 6b 6c 6d 6e 6f 70  "
 497     "|abcdefghijklmnop|\n"
 498     "00000010  71 72 73 74 75 76 77 78  79 7a                    "
 499     "|qrstuvwxyz      |\n",
 500     hexDump(a.data(), a.size()));
 501 }
 502
 503 TEST(System, errnoStr) {
 504   errno = EACCES;
 505   EXPECT_EQ(EACCES, errno);
 506   EXPECT_EQ(EACCES, errno);  // twice to make sure EXPECT_EQ doesn't change it
 507
 508   fbstring expected = strerror(ENOENT);
 509
 510   errno = EACCES;
 511   EXPECT_EQ(expected, errnoStr(ENOENT));
 512   // Ensure that errno isn't changed
 513   EXPECT_EQ(EACCES, errno);
 514
 515   // Per POSIX, all errno values are positive, so -1 is invalid
 516   errnoStr(-1);
 517
 518   // Ensure that errno isn't changed
 519   EXPECT_EQ(EACCES, errno);
 520 }
 521
 522 namespace folly_test {
 523 struct ThisIsAVeryLongStructureName {
 524 };
 525 }  // namespace folly_test
 526
 527 #if FOLLY_HAVE_CPLUS_DEMANGLE_V3_CALLBACK
 528 TEST(System, demangle) {
 529   char expected[] = "folly_test::ThisIsAVeryLongStructureName";
 530   EXPECT_STREQ(
 531       expected,
 532       demangle(typeid(folly_test::ThisIsAVeryLongStructureName)).c_str());
 533
 534   {
 535     char buf[sizeof(expected)];
 536     EXPECT_EQ(sizeof(expected) - 1,
 537               demangle(typeid(folly_test::ThisIsAVeryLongStructureName),
 538                        buf, sizeof(buf)));
 539     EXPECT_STREQ(expected, buf);
 540
 541     EXPECT_EQ(sizeof(expected) - 1,
 542               demangle(typeid(folly_test::ThisIsAVeryLongStructureName),
 543                        buf, 11));
 544     EXPECT_STREQ("folly_test", buf);
 545   }
 546 }
 547 #endif
 548
 549 namespace {
 550
 551 template<template<class,class> class VectorType>
 552 void splitTest() {
 553   VectorType<string,std::allocator<string> > parts;
 554
 555   folly::split(',', "a,b,c", parts);
 556   EXPECT_EQ(parts.size(), 3);
 557   EXPECT_EQ(parts[0], "a");
 558   EXPECT_EQ(parts[1], "b");
 559   EXPECT_EQ(parts[2], "c");
 560   parts.clear();
 561
 562   folly::split(',', StringPiece("a,b,c"), parts);
 563   EXPECT_EQ(parts.size(), 3);
 564   EXPECT_EQ(parts[0], "a");
 565   EXPECT_EQ(parts[1], "b");
 566   EXPECT_EQ(parts[2], "c");
 567   parts.clear();
 568
 569   folly::split(',', string("a,b,c"), parts);
 570   EXPECT_EQ(parts.size(), 3);
 571   EXPECT_EQ(parts[0], "a");
 572   EXPECT_EQ(parts[1], "b");
 573   EXPECT_EQ(parts[2], "c");
 574   parts.clear();
 575
 576   folly::split(',', "a,,c", parts);
 577   EXPECT_EQ(parts.size(), 3);
 578   EXPECT_EQ(parts[0], "a");
 579   EXPECT_EQ(parts[1], "");
 580   EXPECT_EQ(parts[2], "c");
 581   parts.clear();
 582
 583   folly::split(',', string("a,,c"), parts);
 584   EXPECT_EQ(parts.size(), 3);
 585   EXPECT_EQ(parts[0], "a");
 586   EXPECT_EQ(parts[1], "");
 587   EXPECT_EQ(parts[2], "c");
 588   parts.clear();
 589
 590   folly::split(',', "a,,c", parts, true);
 591   EXPECT_EQ(parts.size(), 2);
 592   EXPECT_EQ(parts[0], "a");
 593   EXPECT_EQ(parts[1], "c");
 594   parts.clear();
 595
 596   folly::split(',', string("a,,c"), parts, true);
 597   EXPECT_EQ(parts.size(), 2);
 598   EXPECT_EQ(parts[0], "a");
 599   EXPECT_EQ(parts[1], "c");
 600   parts.clear();
 601
 602   folly::split(',', string(",,a,,c,,,"), parts, true);
 603   EXPECT_EQ(parts.size(), 2);
 604   EXPECT_EQ(parts[0], "a");
 605   EXPECT_EQ(parts[1], "c");
 606   parts.clear();
 607
 608   // test multiple split w/o clear
 609   folly::split(',', ",,a,,c,,,", parts, true);
 610   EXPECT_EQ(parts.size(), 2);
 611   EXPECT_EQ(parts[0], "a");
 612   EXPECT_EQ(parts[1], "c");
 613   folly::split(',', ",,a,,c,,,", parts, true);
 614   EXPECT_EQ(parts.size(), 4);
 615   EXPECT_EQ(parts[2], "a");
 616   EXPECT_EQ(parts[3], "c");
 617   parts.clear();
 618
 619   // test splits that with multi-line delimiter
 620   folly::split("ab", "dabcabkdbkab", parts, true);
 621   EXPECT_EQ(parts.size(), 3);
 622   EXPECT_EQ(parts[0], "d");
 623   EXPECT_EQ(parts[1], "c");
 624   EXPECT_EQ(parts[2], "kdbk");
 625   parts.clear();
 626
 627   // test last part is shorter than the delimiter
 628   folly::split("bc", "abcd", parts, true);
 629   EXPECT_EQ(parts.size(), 2);
 630   EXPECT_EQ(parts[0], "a");
 631   EXPECT_EQ(parts[1], "d");
 632   parts.clear();
 633
 634   string orig = "ab2342asdfv~~!";
 635   folly::split("", orig, parts, true);
 636   EXPECT_EQ(parts.size(), 1);
 637   EXPECT_EQ(parts[0], orig);
 638   parts.clear();
 639
 640   folly::split("452x;o38asfsajsdlfdf.j", "asfds", parts, true);
 641   EXPECT_EQ(parts.size(), 1);
 642   EXPECT_EQ(parts[0], "asfds");
 643   parts.clear();
 644
 645   folly::split("a", "", parts, true);
 646   EXPECT_EQ(parts.size(), 0);
 647   parts.clear();
 648
 649   folly::split("a", "", parts);
 650   EXPECT_EQ(parts.size(), 1);
 651   EXPECT_EQ(parts[0], "");
 652   parts.clear();
 653
 654   folly::split("a", StringPiece(), parts, true);
 655   EXPECT_EQ(parts.size(), 0);
 656   parts.clear();
 657
 658   folly::split("a", StringPiece(), parts);
 659   EXPECT_EQ(parts.size(), 1);
 660   EXPECT_EQ(parts[0], "");
 661   parts.clear();
 662
 663   folly::split("a", "abcdefg", parts, true);
 664   EXPECT_EQ(parts.size(), 1);
 665   EXPECT_EQ(parts[0], "bcdefg");
 666   parts.clear();
 667
 668   orig = "All, , your base, are , , belong to us";
 669   folly::split(", ", orig, parts, true);
 670   EXPECT_EQ(parts.size(), 4);
 671   EXPECT_EQ(parts[0], "All");
 672   EXPECT_EQ(parts[1], "your base");
 673   EXPECT_EQ(parts[2], "are ");
 674   EXPECT_EQ(parts[3], "belong to us");
 675   parts.clear();
 676   folly::split(", ", orig, parts);
 677   EXPECT_EQ(parts.size(), 6);
 678   EXPECT_EQ(parts[0], "All");
 679   EXPECT_EQ(parts[1], "");
 680   EXPECT_EQ(parts[2], "your base");
 681   EXPECT_EQ(parts[3], "are ");
 682   EXPECT_EQ(parts[4], "");
 683   EXPECT_EQ(parts[5], "belong to us");
 684   parts.clear();
 685
 686   orig = ", Facebook, rul,es!, ";
 687   folly::split(", ", orig, parts, true);
 688   EXPECT_EQ(parts.size(), 2);
 689   EXPECT_EQ(parts[0], "Facebook");
 690   EXPECT_EQ(parts[1], "rul,es!");
 691   parts.clear();
 692   folly::split(", ", orig, parts);
 693   EXPECT_EQ(parts.size(), 4);
 694   EXPECT_EQ(parts[0], "");
 695   EXPECT_EQ(parts[1], "Facebook");
 696   EXPECT_EQ(parts[2], "rul,es!");
 697   EXPECT_EQ(parts[3], "");
 698 }
 699
 700 template<template<class,class> class VectorType>
 701 void piecesTest() {
 702   VectorType<StringPiece,std::allocator<StringPiece> > pieces;
 703   VectorType<StringPiece,std::allocator<StringPiece> > pieces2;
 704
 705   folly::split(',', "a,b,c", pieces);
 706   EXPECT_EQ(pieces.size(), 3);
 707   EXPECT_EQ(pieces[0], "a");
 708   EXPECT_EQ(pieces[1], "b");
 709   EXPECT_EQ(pieces[2], "c");
 710
 711   pieces.clear();
 712
 713   folly::split(',', "a,,c", pieces);
 714   EXPECT_EQ(pieces.size(), 3);
 715   EXPECT_EQ(pieces[0], "a");
 716   EXPECT_EQ(pieces[1], "");
 717   EXPECT_EQ(pieces[2], "c");
 718   pieces.clear();
 719
 720   folly::split(',', "a,,c", pieces, true);
 721   EXPECT_EQ(pieces.size(), 2);
 722   EXPECT_EQ(pieces[0], "a");
 723   EXPECT_EQ(pieces[1], "c");
 724   pieces.clear();
 725
 726   folly::split(',', ",,a,,c,,,", pieces, true);
 727   EXPECT_EQ(pieces.size(), 2);
 728   EXPECT_EQ(pieces[0], "a");
 729   EXPECT_EQ(pieces[1], "c");
 730   pieces.clear();
 731
 732   // test multiple split w/o clear
 733   folly::split(',', ",,a,,c,,,", pieces, true);
 734   EXPECT_EQ(pieces.size(), 2);
 735   EXPECT_EQ(pieces[0], "a");
 736   EXPECT_EQ(pieces[1], "c");
 737   folly::split(',', ",,a,,c,,,", pieces, true);
 738   EXPECT_EQ(pieces.size(), 4);
 739   EXPECT_EQ(pieces[2], "a");
 740   EXPECT_EQ(pieces[3], "c");
 741   pieces.clear();
 742
 743   // test multiple split rounds
 744   folly::split(",", "a_b,c_d", pieces);
 745   EXPECT_EQ(pieces.size(), 2);
 746   EXPECT_EQ(pieces[0], "a_b");
 747   EXPECT_EQ(pieces[1], "c_d");
 748   folly::split("_", pieces[0], pieces2);
 749   EXPECT_EQ(pieces2.size(), 2);
 750   EXPECT_EQ(pieces2[0], "a");
 751   EXPECT_EQ(pieces2[1], "b");
 752   pieces2.clear();
 753   folly::split("_", pieces[1], pieces2);
 754   EXPECT_EQ(pieces2.size(), 2);
 755   EXPECT_EQ(pieces2[0], "c");
 756   EXPECT_EQ(pieces2[1], "d");
 757   pieces.clear();
 758   pieces2.clear();
 759
 760   // test splits that with multi-line delimiter
 761   folly::split("ab", "dabcabkdbkab", pieces, true);
 762   EXPECT_EQ(pieces.size(), 3);
 763   EXPECT_EQ(pieces[0], "d");
 764   EXPECT_EQ(pieces[1], "c");
 765   EXPECT_EQ(pieces[2], "kdbk");
 766   pieces.clear();
 767
 768   string orig = "ab2342asdfv~~!";
 769   folly::split("", orig.c_str(), pieces, true);
 770   EXPECT_EQ(pieces.size(), 1);
 771   EXPECT_EQ(pieces[0], orig);
 772   pieces.clear();
 773
 774   folly::split("452x;o38asfsajsdlfdf.j", "asfds", pieces, true);
 775   EXPECT_EQ(pieces.size(), 1);
 776   EXPECT_EQ(pieces[0], "asfds");
 777   pieces.clear();
 778
 779   folly::split("a", "", pieces, true);
 780   EXPECT_EQ(pieces.size(), 0);
 781   pieces.clear();
 782
 783   folly::split("a", "", pieces);
 784   EXPECT_EQ(pieces.size(), 1);
 785   EXPECT_EQ(pieces[0], "");
 786   pieces.clear();
 787
 788   folly::split("a", "abcdefg", pieces, true);
 789   EXPECT_EQ(pieces.size(), 1);
 790   EXPECT_EQ(pieces[0], "bcdefg");
 791   pieces.clear();
 792
 793   orig = "All, , your base, are , , belong to us";
 794   folly::split(", ", orig, pieces, true);
 795   EXPECT_EQ(pieces.size(), 4);
 796   EXPECT_EQ(pieces[0], "All");
 797   EXPECT_EQ(pieces[1], "your base");
 798   EXPECT_EQ(pieces[2], "are ");
 799   EXPECT_EQ(pieces[3], "belong to us");
 800   pieces.clear();
 801   folly::split(", ", orig, pieces);
 802   EXPECT_EQ(pieces.size(), 6);
 803   EXPECT_EQ(pieces[0], "All");
 804   EXPECT_EQ(pieces[1], "");
 805   EXPECT_EQ(pieces[2], "your base");
 806   EXPECT_EQ(pieces[3], "are ");
 807   EXPECT_EQ(pieces[4], "");
 808   EXPECT_EQ(pieces[5], "belong to us");
 809   pieces.clear();
 810
 811   orig = ", Facebook, rul,es!, ";
 812   folly::split(", ", orig, pieces, true);
 813   EXPECT_EQ(pieces.size(), 2);
 814   EXPECT_EQ(pieces[0], "Facebook");
 815   EXPECT_EQ(pieces[1], "rul,es!");
 816   pieces.clear();
 817   folly::split(", ", orig, pieces);
 818   EXPECT_EQ(pieces.size(), 4);
 819   EXPECT_EQ(pieces[0], "");
 820   EXPECT_EQ(pieces[1], "Facebook");
 821   EXPECT_EQ(pieces[2], "rul,es!");
 822   EXPECT_EQ(pieces[3], "");
 823   pieces.clear();
 824
 825   const char* str = "a,b";
 826   folly::split(',', StringPiece(str), pieces);
 827   EXPECT_EQ(pieces.size(), 2);
 828   EXPECT_EQ(pieces[0], "a");
 829   EXPECT_EQ(pieces[1], "b");
 830   EXPECT_EQ(pieces[0].start(), str);
 831   EXPECT_EQ(pieces[1].start(), str + 2);
 832
 833   std::set<StringPiece> unique;
 834   folly::splitTo<StringPiece>(":", "asd:bsd:asd:asd:bsd:csd::asd",
 835     std::inserter(unique, unique.begin()), true);
 836   EXPECT_EQ(unique.size(), 3);
 837   if (unique.size() == 3) {
 838     EXPECT_EQ(*unique.begin(), "asd");
 839     EXPECT_EQ(*--unique.end(), "csd");
 840   }
 841
 842   VectorType<fbstring,std::allocator<fbstring> > blah;
 843   folly::split('-', "a-b-c-d-f-e", blah);
 844   EXPECT_EQ(blah.size(), 6);
 845 }
 846
 847 }
 848
 849 TEST(Split, split_vector) {
 850   splitTest<std::vector>();
 851 }
 852 TEST(Split, split_fbvector) {
 853   splitTest<folly::fbvector>();
 854 }
 855 TEST(Split, pieces_vector) {
 856   piecesTest<std::vector>();
 857 }
 858 TEST(Split, pieces_fbvector) {
 859   piecesTest<folly::fbvector>();
 860 }
 861
 862 TEST(Split, fixed) {
 863   StringPiece a, b, c, d;
 864
 865   EXPECT_TRUE(folly::split<false>('.', "a.b.c.d", a, b, c, d));
 866   EXPECT_TRUE(folly::split<false>('.', "a.b.c", a, b, c));
 867   EXPECT_TRUE(folly::split<false>('.', "a.b", a, b));
 868   EXPECT_TRUE(folly::split<false>('.', "a", a));
 869
 870   EXPECT_TRUE(folly::split('.', "a.b.c.d", a, b, c, d));
 871   EXPECT_TRUE(folly::split('.', "a.b.c", a, b, c));
 872   EXPECT_TRUE(folly::split('.', "a.b", a, b));
 873   EXPECT_TRUE(folly::split('.', "a", a));
 874
 875   EXPECT_TRUE(folly::split<false>('.', "a.b.c", a, b, c));
 876   EXPECT_EQ("a", a);
 877   EXPECT_EQ("b", b);
 878   EXPECT_EQ("c", c);
 879   EXPECT_FALSE(folly::split<false>('.', "a.b", a, b, c));
 880   EXPECT_TRUE(folly::split<false>('.', "a.b.c", a, b));
 881   EXPECT_EQ("a", a);
 882   EXPECT_EQ("b.c", b);
 883
 884   EXPECT_TRUE(folly::split('.', "a.b.c", a, b, c));
 885   EXPECT_EQ("a", a);
 886   EXPECT_EQ("b", b);
 887   EXPECT_EQ("c", c);
 888   EXPECT_FALSE(folly::split('.', "a.b.c", a, b));
 889   EXPECT_FALSE(folly::split('.', "a.b", a, b, c));
 890
 891   EXPECT_TRUE(folly::split<false>('.', "a.b", a, b));
 892   EXPECT_EQ("a", a);
 893   EXPECT_EQ("b", b);
 894   EXPECT_FALSE(folly::split<false>('.', "a", a, b));
 895   EXPECT_TRUE(folly::split<false>('.', "a.b", a));
 896   EXPECT_EQ("a.b", a);
 897
 898   EXPECT_TRUE(folly::split('.', "a.b", a, b));
 899   EXPECT_EQ("a", a);
 900   EXPECT_EQ("b", b);
 901   EXPECT_FALSE(folly::split('.', "a", a, b));
 902   EXPECT_FALSE(folly::split('.', "a.b", a));
 903 }
 904
 905 TEST(Split, fixed_convert) {
 906   StringPiece a, d;
 907   int b;
 908   double c;
 909
 910   EXPECT_TRUE(folly::split(':', "a:13:14.7:b", a, b, c, d));
 911   EXPECT_EQ("a", a);
 912   EXPECT_EQ(13, b);
 913   EXPECT_NEAR(14.7, c, 1e-10);
 914   EXPECT_EQ("b", d);
 915
 916   EXPECT_TRUE(folly::split<false>(':', "b:14:15.3:c", a, b, c, d));
 917   EXPECT_EQ("b", a);
 918   EXPECT_EQ(14, b);
 919   EXPECT_NEAR(15.3, c, 1e-10);
 920   EXPECT_EQ("c", d);
 921
 922   EXPECT_FALSE(folly::split(':', "a:13:14.7:b", a, b, d));
 923
 924   EXPECT_TRUE(folly::split<false>(':', "a:13:14.7:b", a, b, d));
 925   EXPECT_EQ("a", a);
 926   EXPECT_EQ(13, b);
 927   EXPECT_EQ("14.7:b", d);
 928
 929   EXPECT_THROW(folly::split<false>(':', "a:13:14.7:b", a, b, c),
 930                std::range_error);
 931 }
 932
 933 TEST(String, join) {
 934   string output;
 935
 936   std::vector<int> empty = { };
 937   join(":", empty, output);
 938   EXPECT_TRUE(output.empty());
 939
 940   std::vector<std::string> input1 = { "1", "23", "456", "" };
 941   join(':', input1, output);
 942   EXPECT_EQ(output, "1:23:456:");
 943   output = join(':', input1);
 944   EXPECT_EQ(output, "1:23:456:");
 945
 946   auto input2 = { 1, 23, 456 };
 947   join("-*-", input2, output);
 948   EXPECT_EQ(output, "1-*-23-*-456");
 949   output = join("-*-", input2);
 950   EXPECT_EQ(output, "1-*-23-*-456");
 951
 952   auto input3 = { 'f', 'a', 'c', 'e', 'b', 'o', 'o', 'k' };
 953   join("", input3, output);
 954   EXPECT_EQ(output, "facebook");
 955
 956   join("_", { "", "f", "a", "c", "e", "b", "o", "o", "k", "" }, output);
 957   EXPECT_EQ(output, "_f_a_c_e_b_o_o_k_");
 958 }
 959
 960 TEST(String, hexlify) {
 961   string input1 = "0123";
 962   string output1;
 963   EXPECT_TRUE(hexlify(input1, output1));
 964   EXPECT_EQ(output1, "30313233");
 965
 966   fbstring input2 = "abcdefg";
 967   input2[1] = 0;
 968   input2[3] = 0xff;
 969   input2[5] = 0xb6;
 970   fbstring output2;
 971   EXPECT_TRUE(hexlify(input2, output2));
 972   EXPECT_EQ(output2, "610063ff65b667");
 973 }
 974
 975 TEST(String, unhexlify) {
 976   string input1 = "30313233";
 977   string output1;
 978   EXPECT_TRUE(unhexlify(input1, output1));
 979   EXPECT_EQ(output1, "0123");
 980
 981   fbstring input2 = "610063ff65b667";
 982   fbstring output2;
 983   EXPECT_TRUE(unhexlify(input2, output2));
 984   EXPECT_EQ(output2.size(), 7);
 985   EXPECT_EQ(output2[0], 'a');
 986   EXPECT_EQ(output2[1], 0);
 987   EXPECT_EQ(output2[2], 'c');
 988   EXPECT_EQ(output2[3] & 0xff, 0xff);
 989   EXPECT_EQ(output2[4], 'e');
 990   EXPECT_EQ(output2[5] & 0xff, 0xb6);
 991   EXPECT_EQ(output2[6], 'g');
 992
 993   string input3 = "x";
 994   string output3;
 995   EXPECT_FALSE(unhexlify(input3, output3));
 996
 997   string input4 = "xy";
 998   string output4;
 999   EXPECT_FALSE(unhexlify(input4, output4));
1000 }
1001
1002 TEST(String, backslashify) {
1003   EXPECT_EQ("abc", string("abc"));
1004   EXPECT_EQ("abc", backslashify(string("abc")));
1005   EXPECT_EQ("abc\\r", backslashify(string("abc\r")));
1006   EXPECT_EQ("abc\\x0d", backslashify(string("abc\r"), true));
1007   EXPECT_EQ("\\0\\0", backslashify(string(2, '\0')));
1008 }
1009
1010 TEST(String, humanify) {
1011   // Simple cases; output is obvious.
1012   EXPECT_EQ("abc", humanify(string("abc")));
1013   EXPECT_EQ("abc\\\\r", humanify(string("abc\\r")));
1014   EXPECT_EQ("0xff", humanify(string("\xff")));
1015   EXPECT_EQ("abc\\xff", humanify(string("abc\xff")));
1016   EXPECT_EQ("abc\\b", humanify(string("abc\b")));
1017   EXPECT_EQ("0x00", humanify(string(1, '\0')));
1018   EXPECT_EQ("0x0000", humanify(string(2, '\0')));
1019
1020
1021   // Mostly printable, so backslash!  80, 60, and 40% printable, respectively
1022   EXPECT_EQ("aaaa\\xff", humanify(string("aaaa\xff")));
1023   EXPECT_EQ("aaa\\xff\\xff", humanify(string("aaa\xff\xff")));
1024   EXPECT_EQ("aa\\xff\\xff\\xff", humanify(string("aa\xff\xff\xff")));
1025
1026   // 20% printable, and the printable portion isn't the prefix; hexify!
1027   EXPECT_EQ("0xff61ffffff", humanify(string("\xff" "a\xff\xff\xff")));
1028
1029   // Same as previous, except swap first two chars; prefix is
1030   // printable and within the threshold, so backslashify.
1031   EXPECT_EQ("a\\xff\\xff\\xff\\xff", humanify(string("a\xff\xff\xff\xff")));
1032
1033   // Just too much unprintable; hex, despite prefix.
1034   EXPECT_EQ("0x61ffffffffff", humanify(string("a\xff\xff\xff\xff\xff")));
1035 }
1036
1037 //////////////////////////////////////////////////////////////////////
1038
1039 BENCHMARK(splitOnSingleChar, iters) {
1040   static const std::string line = "one:two:three:four";
1041   for (int i = 0; i < iters << 4; ++i) {
1042     std::vector<StringPiece> pieces;
1043     folly::split(':', line, pieces);
1044   }
1045 }
1046
1047 BENCHMARK(splitOnSingleCharFixed, iters) {
1048   static const std::string line = "one:two:three:four";
1049   for (int i = 0; i < iters << 4; ++i) {
1050     StringPiece a, b, c, d;
1051     folly::split(':', line, a, b, c, d);
1052   }
1053 }
1054
1055 BENCHMARK(splitOnSingleCharFixedAllowExtra, iters) {
1056   static const std::string line = "one:two:three:four";
1057   for (int i = 0; i < iters << 4; ++i) {
1058     StringPiece a, b, c, d;
1059     folly::split<false>(':', line, a, b, c, d);
1060   }
1061 }
1062
1063 BENCHMARK(splitStr, iters) {
1064   static const std::string line = "one-*-two-*-three-*-four";
1065   for (int i = 0; i < iters << 4; ++i) {
1066     std::vector<StringPiece> pieces;
1067     folly::split("-*-", line, pieces);
1068   }
1069 }
1070
1071 BENCHMARK(splitStrFixed, iters) {
1072   static const std::string line = "one-*-two-*-three-*-four";
1073   for (int i = 0; i < iters << 4; ++i) {
1074     StringPiece a, b, c, d;
1075     folly::split("-*-", line, a, b, c, d);
1076   }
1077 }
1078
1079 BENCHMARK(boost_splitOnSingleChar, iters) {
1080   static const std::string line = "one:two:three:four";
1081   bool(*pred)(char) = [] (char c) -> bool { return c == ':'; };
1082   for (int i = 0; i < iters << 4; ++i) {
1083     std::vector<boost::iterator_range<std::string::const_iterator> > pieces;
1084     boost::split(pieces, line, pred);
1085   }
1086 }
1087
1088 BENCHMARK(joinCharStr, iters) {
1089   static const std::vector<std::string> input = {
1090     "one", "two", "three", "four", "five", "six", "seven" };
1091   for (int i = 0; i < iters << 4; ++i) {
1092     std::string output;
1093     folly::join(':', input, output);
1094   }
1095 }
1096
1097 BENCHMARK(joinStrStr, iters) {
1098   static const std::vector<std::string> input = {
1099     "one", "two", "three", "four", "five", "six", "seven" };
1100   for (int i = 0; i < iters << 4; ++i) {
1101     std::string output;
1102     folly::join(":", input, output);
1103   }
1104 }
1105
1106 BENCHMARK(joinInt, iters) {
1107   static const auto input = {
1108     123, 456, 78910, 1112, 1314, 151, 61718 };
1109   for (int i = 0; i < iters << 4; ++i) {
1110     std::string output;
1111     folly::join(":", input, output);
1112   }
1113 }
1114
1115 int main(int argc, char *argv[]) {
1116   testing::InitGoogleTest(&argc, argv);
1117   gflags::ParseCommandLineFlags(&argc, &argv, true);
1118   auto ret = RUN_ALL_TESTS();
1119   if (!ret) {
1120     initBenchmark();
1121     if (FLAGS_benchmark) {
1122       folly::runBenchmarks();
1123     }
1124   }
1125   return ret;
1126 }