folly/test/StringTest.cpp

   1 /*
   2  * Copyright 2012 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 namespace {
 135 fbstring bmString;
 136 fbstring bmEscapedString;
 137 fbstring escapedString;
 138 fbstring unescapedString;
 139 const size_t kBmStringLength = 64 << 10;
 140 const uint32_t kPrintablePercentage = 90;
 141
 142 void initBenchmark() {
 143   bmString.reserve(kBmStringLength);
 144
 145   std::mt19937 rnd;
 146   std::uniform_int_distribution<uint32_t> printable(32, 126);
 147   std::uniform_int_distribution<uint32_t> nonPrintable(0, 160);
 148   std::uniform_int_distribution<uint32_t> percentage(0, 99);
 149
 150   for (size_t i = 0; i < kBmStringLength; ++i) {
 151     unsigned char c;
 152     if (percentage(rnd) < kPrintablePercentage) {
 153       c = printable(rnd);
 154     } else {
 155       c = nonPrintable(rnd);
 156       // Generate characters in both non-printable ranges:
 157       // 0..31 and 127..255
 158       if (c >= 32) {
 159         c += (126 - 32) + 1;
 160       }
 161     }
 162     bmString.push_back(c);
 163   }
 164
 165   bmEscapedString = cEscape<fbstring>(bmString);
 166 }
 167
 168 BENCHMARK(BM_cEscape, iters) {
 169   while (iters--) {
 170     escapedString = cEscape<fbstring>(bmString);
 171     doNotOptimizeAway(escapedString.size());
 172   }
 173 }
 174
 175 BENCHMARK(BM_cUnescape, iters) {
 176   while (iters--) {
 177     unescapedString = cUnescape<fbstring>(bmEscapedString);
 178     doNotOptimizeAway(unescapedString.size());
 179   }
 180 }
 181
 182 }  // namespace
 183
 184 namespace {
 185
 186 double pow2(int exponent) {
 187   return double(int64_t(1) << exponent);
 188 }
 189
 190 }  // namespace
 191
 192 TEST(PrettyPrint, Basic) {
 193   // check time printing
 194   EXPECT_EQ(string("8.53e+07 s "), prettyPrint(85.3e6, PRETTY_TIME));
 195   EXPECT_EQ(string("85.3 s "), prettyPrint(85.3, PRETTY_TIME));
 196   EXPECT_EQ(string("85.3 ms"), prettyPrint(85.3e-3, PRETTY_TIME));
 197   EXPECT_EQ(string("85.3 us"), prettyPrint(85.3e-6, PRETTY_TIME));
 198   EXPECT_EQ(string("85.3 ns"), prettyPrint(85.3e-9, PRETTY_TIME));
 199   EXPECT_EQ(string("85.3 ps"), prettyPrint(85.3e-12, PRETTY_TIME));
 200   EXPECT_EQ(string("8.53e-14 s "), prettyPrint(85.3e-15, PRETTY_TIME));
 201
 202   EXPECT_EQ(string("0 s "), prettyPrint(0, PRETTY_TIME));
 203   EXPECT_EQ(string("1 s "), prettyPrint(1.0, PRETTY_TIME));
 204   EXPECT_EQ(string("1 ms"), prettyPrint(1.0e-3, PRETTY_TIME));
 205   EXPECT_EQ(string("1 us"), prettyPrint(1.0e-6, PRETTY_TIME));
 206   EXPECT_EQ(string("1 ns"), prettyPrint(1.0e-9, PRETTY_TIME));
 207   EXPECT_EQ(string("1 ps"), prettyPrint(1.0e-12, PRETTY_TIME));
 208
 209   // check bytes printing
 210   EXPECT_EQ(string("853 B "), prettyPrint(853., PRETTY_BYTES));
 211   EXPECT_EQ(string("833 kB"), prettyPrint(853.e3, PRETTY_BYTES));
 212   EXPECT_EQ(string("813.5 MB"), prettyPrint(853.e6, PRETTY_BYTES));
 213   EXPECT_EQ(string("7.944 GB"), prettyPrint(8.53e9, PRETTY_BYTES));
 214   EXPECT_EQ(string("794.4 GB"), prettyPrint(853.e9, PRETTY_BYTES));
 215   EXPECT_EQ(string("775.8 TB"), prettyPrint(853.e12, PRETTY_BYTES));
 216
 217   EXPECT_EQ(string("0 B "), prettyPrint(0, PRETTY_BYTES));
 218   EXPECT_EQ(string("1 B "), prettyPrint(pow2(0), PRETTY_BYTES));
 219   EXPECT_EQ(string("1 kB"), prettyPrint(pow2(10), PRETTY_BYTES));
 220   EXPECT_EQ(string("1 MB"), prettyPrint(pow2(20), PRETTY_BYTES));
 221   EXPECT_EQ(string("1 GB"), prettyPrint(pow2(30), PRETTY_BYTES));
 222   EXPECT_EQ(string("1 TB"), prettyPrint(pow2(40), PRETTY_BYTES));
 223
 224   // check bytes metric printing
 225   EXPECT_EQ(string("853 B "), prettyPrint(853., PRETTY_BYTES_METRIC));
 226   EXPECT_EQ(string("853 kB"), prettyPrint(853.e3, PRETTY_BYTES_METRIC));
 227   EXPECT_EQ(string("853 MB"), prettyPrint(853.e6, PRETTY_BYTES_METRIC));
 228   EXPECT_EQ(string("8.53 GB"), prettyPrint(8.53e9, PRETTY_BYTES_METRIC));
 229   EXPECT_EQ(string("853 GB"), prettyPrint(853.e9, PRETTY_BYTES_METRIC));
 230   EXPECT_EQ(string("853 TB"), prettyPrint(853.e12, PRETTY_BYTES_METRIC));
 231
 232   EXPECT_EQ(string("0 B "), prettyPrint(0, PRETTY_BYTES_METRIC));
 233   EXPECT_EQ(string("1 B "), prettyPrint(1.0, PRETTY_BYTES_METRIC));
 234   EXPECT_EQ(string("1 kB"), prettyPrint(1.0e+3, PRETTY_BYTES_METRIC));
 235   EXPECT_EQ(string("1 MB"), prettyPrint(1.0e+6, PRETTY_BYTES_METRIC));
 236
 237   EXPECT_EQ(string("1 GB"), prettyPrint(1.0e+9, PRETTY_BYTES_METRIC));
 238   EXPECT_EQ(string("1 TB"), prettyPrint(1.0e+12, PRETTY_BYTES_METRIC));
 239
 240   // check metric-units (powers of 1000) printing
 241   EXPECT_EQ(string("853  "), prettyPrint(853., PRETTY_UNITS_METRIC));
 242   EXPECT_EQ(string("853 k"), prettyPrint(853.e3, PRETTY_UNITS_METRIC));
 243   EXPECT_EQ(string("853 M"), prettyPrint(853.e6, PRETTY_UNITS_METRIC));
 244   EXPECT_EQ(string("8.53 bil"), prettyPrint(8.53e9, PRETTY_UNITS_METRIC));
 245   EXPECT_EQ(string("853 bil"), prettyPrint(853.e9, PRETTY_UNITS_METRIC));
 246   EXPECT_EQ(string("853 tril"), prettyPrint(853.e12, PRETTY_UNITS_METRIC));
 247
 248   // check binary-units (powers of 1024) printing
 249   EXPECT_EQ(string("0  "), prettyPrint(0, PRETTY_UNITS_BINARY));
 250   EXPECT_EQ(string("1  "), prettyPrint(pow2(0), PRETTY_UNITS_BINARY));
 251   EXPECT_EQ(string("1 k"), prettyPrint(pow2(10), PRETTY_UNITS_BINARY));
 252   EXPECT_EQ(string("1 M"), prettyPrint(pow2(20), PRETTY_UNITS_BINARY));
 253   EXPECT_EQ(string("1 G"), prettyPrint(pow2(30), PRETTY_UNITS_BINARY));
 254   EXPECT_EQ(string("1 T"), prettyPrint(pow2(40), PRETTY_UNITS_BINARY));
 255
 256   EXPECT_EQ(string("1023  "),
 257       prettyPrint(pow2(10) - 1, PRETTY_UNITS_BINARY));
 258   EXPECT_EQ(string("1024 k"),
 259       prettyPrint(pow2(20) - 1, PRETTY_UNITS_BINARY));
 260   EXPECT_EQ(string("1024 M"),
 261       prettyPrint(pow2(30) - 1, PRETTY_UNITS_BINARY));
 262   EXPECT_EQ(string("1024 G"),
 263       prettyPrint(pow2(40) - 1, PRETTY_UNITS_BINARY));
 264
 265   // check that negative values work
 266   EXPECT_EQ(string("-85.3 s "), prettyPrint(-85.3, PRETTY_TIME));
 267   EXPECT_EQ(string("-85.3 ms"), prettyPrint(-85.3e-3, PRETTY_TIME));
 268   EXPECT_EQ(string("-85.3 us"), prettyPrint(-85.3e-6, PRETTY_TIME));
 269   EXPECT_EQ(string("-85.3 ns"), prettyPrint(-85.3e-9, PRETTY_TIME));
 270 }
 271
 272 TEST(PrettyPrint, HexDump) {
 273   std::string a("abc\x00\x02\xa0", 6);  // embedded NUL
 274   EXPECT_EQ(
 275     "00000000  61 62 63 00 02 a0                                 "
 276     "|abc...          |\n",
 277     hexDump(a.data(), a.size()));
 278
 279   a = "abcdefghijklmnopqrstuvwxyz";
 280   EXPECT_EQ(
 281     "00000000  61 62 63 64 65 66 67 68  69 6a 6b 6c 6d 6e 6f 70  "
 282     "|abcdefghijklmnop|\n"
 283     "00000010  71 72 73 74 75 76 77 78  79 7a                    "
 284     "|qrstuvwxyz      |\n",
 285     hexDump(a.data(), a.size()));
 286 }
 287
 288 TEST(System, errnoStr) {
 289   errno = EACCES;
 290   EXPECT_EQ(EACCES, errno);
 291   EXPECT_EQ(EACCES, errno);  // twice to make sure EXPECT_EQ doesn't change it
 292
 293   fbstring expected = strerror(ENOENT);
 294
 295   errno = EACCES;
 296   EXPECT_EQ(expected, errnoStr(ENOENT));
 297   // Ensure that errno isn't changed
 298   EXPECT_EQ(EACCES, errno);
 299
 300   // Per POSIX, all errno values are positive, so -1 is invalid
 301   errnoStr(-1);
 302
 303   // Ensure that errno isn't changed
 304   EXPECT_EQ(EACCES, errno);
 305 }
 306
 307 namespace folly_test {
 308 struct ThisIsAVeryLongStructureName {
 309 };
 310 }  // namespace folly_test
 311
 312 TEST(System, demangle) {
 313   EXPECT_EQ("folly_test::ThisIsAVeryLongStructureName",
 314             demangle(typeid(folly_test::ThisIsAVeryLongStructureName)));
 315 }
 316
 317 namespace {
 318
 319 template<template<class,class> class VectorType>
 320 void splitTest() {
 321   VectorType<string,std::allocator<string> > parts;
 322
 323   folly::split(',', "a,b,c", parts);
 324   EXPECT_EQ(parts.size(), 3);
 325   EXPECT_EQ(parts[0], "a");
 326   EXPECT_EQ(parts[1], "b");
 327   EXPECT_EQ(parts[2], "c");
 328   parts.clear();
 329
 330   folly::split(',', string("a,b,c"), parts);
 331   EXPECT_EQ(parts.size(), 3);
 332   EXPECT_EQ(parts[0], "a");
 333   EXPECT_EQ(parts[1], "b");
 334   EXPECT_EQ(parts[2], "c");
 335   parts.clear();
 336
 337   folly::split(',', "a,,c", parts);
 338   EXPECT_EQ(parts.size(), 3);
 339   EXPECT_EQ(parts[0], "a");
 340   EXPECT_EQ(parts[1], "");
 341   EXPECT_EQ(parts[2], "c");
 342   parts.clear();
 343
 344   folly::split(',', string("a,,c"), parts);
 345   EXPECT_EQ(parts.size(), 3);
 346   EXPECT_EQ(parts[0], "a");
 347   EXPECT_EQ(parts[1], "");
 348   EXPECT_EQ(parts[2], "c");
 349   parts.clear();
 350
 351   folly::split(',', "a,,c", parts, true);
 352   EXPECT_EQ(parts.size(), 2);
 353   EXPECT_EQ(parts[0], "a");
 354   EXPECT_EQ(parts[1], "c");
 355   parts.clear();
 356
 357   folly::split(',', string("a,,c"), parts, true);
 358   EXPECT_EQ(parts.size(), 2);
 359   EXPECT_EQ(parts[0], "a");
 360   EXPECT_EQ(parts[1], "c");
 361   parts.clear();
 362
 363   folly::split(',', string(",,a,,c,,,"), parts, true);
 364   EXPECT_EQ(parts.size(), 2);
 365   EXPECT_EQ(parts[0], "a");
 366   EXPECT_EQ(parts[1], "c");
 367   parts.clear();
 368
 369   // test multiple split w/o clear
 370   folly::split(',', ",,a,,c,,,", parts, true);
 371   EXPECT_EQ(parts.size(), 2);
 372   EXPECT_EQ(parts[0], "a");
 373   EXPECT_EQ(parts[1], "c");
 374   folly::split(',', ",,a,,c,,,", parts, true);
 375   EXPECT_EQ(parts.size(), 4);
 376   EXPECT_EQ(parts[2], "a");
 377   EXPECT_EQ(parts[3], "c");
 378   parts.clear();
 379
 380   // test splits that with multi-line delimiter
 381   folly::split("ab", "dabcabkdbkab", parts, true);
 382   EXPECT_EQ(parts.size(), 3);
 383   EXPECT_EQ(parts[0], "d");
 384   EXPECT_EQ(parts[1], "c");
 385   EXPECT_EQ(parts[2], "kdbk");
 386   parts.clear();
 387
 388   string orig = "ab2342asdfv~~!";
 389   folly::split("", orig, parts, true);
 390   EXPECT_EQ(parts.size(), 1);
 391   EXPECT_EQ(parts[0], orig);
 392   parts.clear();
 393
 394   folly::split("452x;o38asfsajsdlfdf.j", "asfds", parts, true);
 395   EXPECT_EQ(parts.size(), 1);
 396   EXPECT_EQ(parts[0], "asfds");
 397   parts.clear();
 398
 399   folly::split("a", "", parts, true);
 400   EXPECT_EQ(parts.size(), 0);
 401   parts.clear();
 402
 403   folly::split("a", "", parts);
 404   EXPECT_EQ(parts.size(), 1);
 405   EXPECT_EQ(parts[0], "");
 406   parts.clear();
 407
 408   folly::split("a", "abcdefg", parts, true);
 409   EXPECT_EQ(parts.size(), 1);
 410   EXPECT_EQ(parts[0], "bcdefg");
 411   parts.clear();
 412
 413   orig = "All, , your bases, are , , belong to us";
 414   folly::split(", ", orig, parts, true);
 415   EXPECT_EQ(parts.size(), 4);
 416   EXPECT_EQ(parts[0], "All");
 417   EXPECT_EQ(parts[1], "your bases");
 418   EXPECT_EQ(parts[2], "are ");
 419   EXPECT_EQ(parts[3], "belong to us");
 420   parts.clear();
 421   folly::split(", ", orig, parts);
 422   EXPECT_EQ(parts.size(), 6);
 423   EXPECT_EQ(parts[0], "All");
 424   EXPECT_EQ(parts[1], "");
 425   EXPECT_EQ(parts[2], "your bases");
 426   EXPECT_EQ(parts[3], "are ");
 427   EXPECT_EQ(parts[4], "");
 428   EXPECT_EQ(parts[5], "belong to us");
 429   parts.clear();
 430
 431   orig = ", Facebook, rul,es!, ";
 432   folly::split(", ", orig, parts, true);
 433   EXPECT_EQ(parts.size(), 2);
 434   EXPECT_EQ(parts[0], "Facebook");
 435   EXPECT_EQ(parts[1], "rul,es!");
 436   parts.clear();
 437   folly::split(", ", orig, parts);
 438   EXPECT_EQ(parts.size(), 4);
 439   EXPECT_EQ(parts[0], "");
 440   EXPECT_EQ(parts[1], "Facebook");
 441   EXPECT_EQ(parts[2], "rul,es!");
 442   EXPECT_EQ(parts[3], "");
 443 }
 444
 445 template<template<class,class> class VectorType>
 446 void piecesTest() {
 447   VectorType<StringPiece,std::allocator<StringPiece> > pieces;
 448   VectorType<StringPiece,std::allocator<StringPiece> > pieces2;
 449
 450   folly::split(',', "a,b,c", pieces);
 451   EXPECT_EQ(pieces.size(), 3);
 452   EXPECT_EQ(pieces[0], "a");
 453   EXPECT_EQ(pieces[1], "b");
 454   EXPECT_EQ(pieces[2], "c");
 455
 456   pieces.clear();
 457
 458   folly::split(',', "a,,c", pieces);
 459   EXPECT_EQ(pieces.size(), 3);
 460   EXPECT_EQ(pieces[0], "a");
 461   EXPECT_EQ(pieces[1], "");
 462   EXPECT_EQ(pieces[2], "c");
 463   pieces.clear();
 464
 465   folly::split(',', "a,,c", pieces, true);
 466   EXPECT_EQ(pieces.size(), 2);
 467   EXPECT_EQ(pieces[0], "a");
 468   EXPECT_EQ(pieces[1], "c");
 469   pieces.clear();
 470
 471   folly::split(',', ",,a,,c,,,", pieces, true);
 472   EXPECT_EQ(pieces.size(), 2);
 473   EXPECT_EQ(pieces[0], "a");
 474   EXPECT_EQ(pieces[1], "c");
 475   pieces.clear();
 476
 477   // test multiple split w/o clear
 478   folly::split(',', ",,a,,c,,,", pieces, true);
 479   EXPECT_EQ(pieces.size(), 2);
 480   EXPECT_EQ(pieces[0], "a");
 481   EXPECT_EQ(pieces[1], "c");
 482   folly::split(',', ",,a,,c,,,", pieces, true);
 483   EXPECT_EQ(pieces.size(), 4);
 484   EXPECT_EQ(pieces[2], "a");
 485   EXPECT_EQ(pieces[3], "c");
 486   pieces.clear();
 487
 488   // test multiple split rounds
 489   folly::split(",", "a_b,c_d", pieces);
 490   EXPECT_EQ(pieces.size(), 2);
 491   EXPECT_EQ(pieces[0], "a_b");
 492   EXPECT_EQ(pieces[1], "c_d");
 493   folly::split("_", pieces[0], pieces2);
 494   EXPECT_EQ(pieces2.size(), 2);
 495   EXPECT_EQ(pieces2[0], "a");
 496   EXPECT_EQ(pieces2[1], "b");
 497   pieces2.clear();
 498   folly::split("_", pieces[1], pieces2);
 499   EXPECT_EQ(pieces2.size(), 2);
 500   EXPECT_EQ(pieces2[0], "c");
 501   EXPECT_EQ(pieces2[1], "d");
 502   pieces.clear();
 503   pieces2.clear();
 504
 505   // test splits that with multi-line delimiter
 506   folly::split("ab", "dabcabkdbkab", pieces, true);
 507   EXPECT_EQ(pieces.size(), 3);
 508   EXPECT_EQ(pieces[0], "d");
 509   EXPECT_EQ(pieces[1], "c");
 510   EXPECT_EQ(pieces[2], "kdbk");
 511   pieces.clear();
 512
 513   string orig = "ab2342asdfv~~!";
 514   folly::split("", orig.c_str(), pieces, true);
 515   EXPECT_EQ(pieces.size(), 1);
 516   EXPECT_EQ(pieces[0], orig);
 517   pieces.clear();
 518
 519   folly::split("452x;o38asfsajsdlfdf.j", "asfds", pieces, true);
 520   EXPECT_EQ(pieces.size(), 1);
 521   EXPECT_EQ(pieces[0], "asfds");
 522   pieces.clear();
 523
 524   folly::split("a", "", pieces, true);
 525   EXPECT_EQ(pieces.size(), 0);
 526   pieces.clear();
 527
 528   folly::split("a", "", pieces);
 529   EXPECT_EQ(pieces.size(), 1);
 530   EXPECT_EQ(pieces[0], "");
 531   pieces.clear();
 532
 533   folly::split("a", "abcdefg", pieces, true);
 534   EXPECT_EQ(pieces.size(), 1);
 535   EXPECT_EQ(pieces[0], "bcdefg");
 536   pieces.clear();
 537
 538   orig = "All, , your bases, are , , belong to us";
 539   folly::split(", ", orig, pieces, true);
 540   EXPECT_EQ(pieces.size(), 4);
 541   EXPECT_EQ(pieces[0], "All");
 542   EXPECT_EQ(pieces[1], "your bases");
 543   EXPECT_EQ(pieces[2], "are ");
 544   EXPECT_EQ(pieces[3], "belong to us");
 545   pieces.clear();
 546   folly::split(", ", orig, pieces);
 547   EXPECT_EQ(pieces.size(), 6);
 548   EXPECT_EQ(pieces[0], "All");
 549   EXPECT_EQ(pieces[1], "");
 550   EXPECT_EQ(pieces[2], "your bases");
 551   EXPECT_EQ(pieces[3], "are ");
 552   EXPECT_EQ(pieces[4], "");
 553   EXPECT_EQ(pieces[5], "belong to us");
 554   pieces.clear();
 555
 556   orig = ", Facebook, rul,es!, ";
 557   folly::split(", ", orig, pieces, true);
 558   EXPECT_EQ(pieces.size(), 2);
 559   EXPECT_EQ(pieces[0], "Facebook");
 560   EXPECT_EQ(pieces[1], "rul,es!");
 561   pieces.clear();
 562   folly::split(", ", orig, pieces);
 563   EXPECT_EQ(pieces.size(), 4);
 564   EXPECT_EQ(pieces[0], "");
 565   EXPECT_EQ(pieces[1], "Facebook");
 566   EXPECT_EQ(pieces[2], "rul,es!");
 567   EXPECT_EQ(pieces[3], "");
 568   pieces.clear();
 569
 570   const char* str = "a,b";
 571   folly::split(',', StringPiece(str), pieces);
 572   EXPECT_EQ(pieces.size(), 2);
 573   EXPECT_EQ(pieces[0], "a");
 574   EXPECT_EQ(pieces[1], "b");
 575   EXPECT_EQ(pieces[0].start(), str);
 576   EXPECT_EQ(pieces[1].start(), str + 2);
 577
 578   std::set<StringPiece> unique;
 579   folly::splitTo<StringPiece>(":", "asd:bsd:asd:asd:bsd:csd::asd",
 580     std::inserter(unique, unique.begin()), true);
 581   EXPECT_EQ(unique.size(), 3);
 582   if (unique.size() == 3) {
 583     EXPECT_EQ(*unique.begin(), "asd");
 584     EXPECT_EQ(*--unique.end(), "csd");
 585   }
 586
 587   VectorType<fbstring,std::allocator<fbstring> > blah;
 588   folly::split('-', "a-b-c-d-f-e", blah);
 589   EXPECT_EQ(blah.size(), 6);
 590 }
 591
 592 }
 593
 594 TEST(Split, split_vector) {
 595   splitTest<std::vector>();
 596 }
 597 TEST(Split, split_fbvector) {
 598   splitTest<folly::fbvector>();
 599 }
 600 TEST(Split, pieces_vector) {
 601   piecesTest<std::vector>();
 602 }
 603 TEST(Split, pieces_fbvector) {
 604   piecesTest<folly::fbvector>();
 605 }
 606
 607 TEST(String, hexlify) {
 608   string input1 = "0123";
 609   string output1;
 610   EXPECT_TRUE(hexlify(input1, output1));
 611   EXPECT_EQ(output1, "30313233");
 612
 613   fbstring input2 = "abcdefg";
 614   input2[1] = 0;
 615   input2[3] = 0xff;
 616   input2[5] = 0xb6;
 617   fbstring output2;
 618   EXPECT_TRUE(hexlify(input2, output2));
 619   EXPECT_EQ(output2, "610063ff65b667");
 620 }
 621
 622 TEST(String, unhexlify) {
 623   string input1 = "30313233";
 624   string output1;
 625   EXPECT_TRUE(unhexlify(input1, output1));
 626   EXPECT_EQ(output1, "0123");
 627
 628   fbstring input2 = "610063ff65b667";
 629   fbstring output2;
 630   EXPECT_TRUE(unhexlify(input2, output2));
 631   EXPECT_EQ(output2.size(), 7);
 632   EXPECT_EQ(output2[0], 'a');
 633   EXPECT_EQ(output2[1], 0);
 634   EXPECT_EQ(output2[2], 'c');
 635   EXPECT_EQ(output2[3] & 0xff, 0xff);
 636   EXPECT_EQ(output2[4], 'e');
 637   EXPECT_EQ(output2[5] & 0xff, 0xb6);
 638   EXPECT_EQ(output2[6], 'g');
 639
 640   string input3 = "x";
 641   string output3;
 642   EXPECT_FALSE(unhexlify(input3, output3));
 643
 644   string input4 = "xy";
 645   string output4;
 646   EXPECT_FALSE(unhexlify(input4, output4));
 647 }
 648
 649 TEST(String, backslashify) {
 650   EXPECT_EQ("abc", string("abc"));
 651   EXPECT_EQ("abc", backslashify(string("abc")));
 652   EXPECT_EQ("abc\\r", backslashify(string("abc\r")));
 653   EXPECT_EQ("abc\\x0d", backslashify(string("abc\r"), true));
 654   EXPECT_EQ("\\0\\0", backslashify(string(2, '\0')));
 655 }
 656
 657 TEST(String, humanify) {
 658   // Simple cases; output is obvious.
 659   EXPECT_EQ("abc", humanify(string("abc")));
 660   EXPECT_EQ("abc\\\\r", humanify(string("abc\\r")));
 661   EXPECT_EQ("0xff", humanify(string("\xff")));
 662   EXPECT_EQ("abc\\xff", humanify(string("abc\xff")));
 663   EXPECT_EQ("abc\\b", humanify(string("abc\b")));
 664   EXPECT_EQ("0x00", humanify(string(1, '\0')));
 665   EXPECT_EQ("0x0000", humanify(string(2, '\0')));
 666
 667
 668   // Mostly printable, so backslash!  80, 60, and 40% printable, respectively
 669   EXPECT_EQ("aaaa\\xff", humanify(string("aaaa\xff")));
 670   EXPECT_EQ("aaa\\xff\\xff", humanify(string("aaa\xff\xff")));
 671   EXPECT_EQ("aa\\xff\\xff\\xff", humanify(string("aa\xff\xff\xff")));
 672
 673   // 20% printable, and the printable portion isn't the prefix; hexify!
 674   EXPECT_EQ("0xff61ffffff", humanify(string("\xff" "a\xff\xff\xff")));
 675
 676   // Same as previous, except swap first two chars; prefix is
 677   // printable and within the threshold, so backslashify.
 678   EXPECT_EQ("a\\xff\\xff\\xff\\xff", humanify(string("a\xff\xff\xff\xff")));
 679
 680   // Just too much unprintable; hex, despite prefix.
 681   EXPECT_EQ("0x61ffffffffff", humanify(string("a\xff\xff\xff\xff\xff")));
 682 }
 683
 684 //////////////////////////////////////////////////////////////////////
 685
 686 BENCHMARK(splitOnSingleChar, iters) {
 687   const std::string line = "one:two:three:four";
 688   for (int i = 0; i < iters << 4; ++i) {
 689     std::vector<StringPiece> pieces;
 690     folly::split(':', line, pieces);
 691   }
 692 }
 693
 694 BENCHMARK(splitStr, iters) {
 695   const std::string line = "one-*-two-*-three-*-four";
 696   for (int i = 0; i < iters << 4; ++i) {
 697     std::vector<StringPiece> pieces;
 698     folly::split("-*-", line, pieces);
 699   }
 700 }
 701
 702 BENCHMARK(boost_splitOnSingleChar, iters) {
 703   std::string line = "one:two:three:four";
 704   for (int i = 0; i < iters << 4; ++i) {
 705     std::vector<boost::iterator_range<std::string::iterator>> pieces;
 706     boost::split(pieces, line, [] (char c) { return c == ':'; });
 707   }
 708 }
 709
 710 int main(int argc, char *argv[]) {
 711   testing::InitGoogleTest(&argc, argv);
 712   google::ParseCommandLineFlags(&argc, &argv, true);
 713   auto ret = RUN_ALL_TESTS();
 714   if (!ret) {
 715     initBenchmark();
 716     if (FLAGS_benchmark) {
 717       folly::runBenchmarks();
 718     }
 719   }
 720   return ret;
 721 }
 722