folly/test/StringTest.cpp

   1 /*
   2  * Copyright 2013 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
 316 TEST(PrettyPrint, Basic) {
 317   // check time printing
 318   EXPECT_EQ(string("8.53e+07 s "), prettyPrint(85.3e6, PRETTY_TIME));
 319   EXPECT_EQ(string("85.3 s "), prettyPrint(85.3, PRETTY_TIME));
 320   EXPECT_EQ(string("85.3 ms"), prettyPrint(85.3e-3, PRETTY_TIME));
 321   EXPECT_EQ(string("85.3 us"), prettyPrint(85.3e-6, PRETTY_TIME));
 322   EXPECT_EQ(string("85.3 ns"), prettyPrint(85.3e-9, PRETTY_TIME));
 323   EXPECT_EQ(string("85.3 ps"), prettyPrint(85.3e-12, PRETTY_TIME));
 324   EXPECT_EQ(string("8.53e-14 s "), prettyPrint(85.3e-15, PRETTY_TIME));
 325
 326   EXPECT_EQ(string("0 s "), prettyPrint(0, PRETTY_TIME));
 327   EXPECT_EQ(string("1 s "), prettyPrint(1.0, PRETTY_TIME));
 328   EXPECT_EQ(string("1 ms"), prettyPrint(1.0e-3, PRETTY_TIME));
 329   EXPECT_EQ(string("1 us"), prettyPrint(1.0e-6, PRETTY_TIME));
 330   EXPECT_EQ(string("1 ns"), prettyPrint(1.0e-9, PRETTY_TIME));
 331   EXPECT_EQ(string("1 ps"), prettyPrint(1.0e-12, PRETTY_TIME));
 332
 333   // check bytes printing
 334   EXPECT_EQ(string("853 B "), prettyPrint(853., PRETTY_BYTES));
 335   EXPECT_EQ(string("833 kB"), prettyPrint(853.e3, PRETTY_BYTES));
 336   EXPECT_EQ(string("813.5 MB"), prettyPrint(853.e6, PRETTY_BYTES));
 337   EXPECT_EQ(string("7.944 GB"), prettyPrint(8.53e9, PRETTY_BYTES));
 338   EXPECT_EQ(string("794.4 GB"), prettyPrint(853.e9, PRETTY_BYTES));
 339   EXPECT_EQ(string("775.8 TB"), prettyPrint(853.e12, PRETTY_BYTES));
 340
 341   EXPECT_EQ(string("0 B "), prettyPrint(0, PRETTY_BYTES));
 342   EXPECT_EQ(string("1 B "), prettyPrint(pow2(0), PRETTY_BYTES));
 343   EXPECT_EQ(string("1 kB"), prettyPrint(pow2(10), PRETTY_BYTES));
 344   EXPECT_EQ(string("1 MB"), prettyPrint(pow2(20), PRETTY_BYTES));
 345   EXPECT_EQ(string("1 GB"), prettyPrint(pow2(30), PRETTY_BYTES));
 346   EXPECT_EQ(string("1 TB"), prettyPrint(pow2(40), PRETTY_BYTES));
 347
 348   EXPECT_EQ(string("853 B  "), prettyPrint(853., PRETTY_BYTES_IEC));
 349   EXPECT_EQ(string("833 KiB"), prettyPrint(853.e3, PRETTY_BYTES_IEC));
 350   EXPECT_EQ(string("813.5 MiB"), prettyPrint(853.e6, PRETTY_BYTES_IEC));
 351   EXPECT_EQ(string("7.944 GiB"), prettyPrint(8.53e9, PRETTY_BYTES_IEC));
 352   EXPECT_EQ(string("794.4 GiB"), prettyPrint(853.e9, PRETTY_BYTES_IEC));
 353   EXPECT_EQ(string("775.8 TiB"), prettyPrint(853.e12, PRETTY_BYTES_IEC));
 354
 355   EXPECT_EQ(string("0 B  "), prettyPrint(0, PRETTY_BYTES_IEC));
 356   EXPECT_EQ(string("1 B  "), prettyPrint(pow2(0), PRETTY_BYTES_IEC));
 357   EXPECT_EQ(string("1 KiB"), prettyPrint(pow2(10), PRETTY_BYTES_IEC));
 358   EXPECT_EQ(string("1 MiB"), prettyPrint(pow2(20), PRETTY_BYTES_IEC));
 359   EXPECT_EQ(string("1 GiB"), prettyPrint(pow2(30), PRETTY_BYTES_IEC));
 360   EXPECT_EQ(string("1 TiB"), prettyPrint(pow2(40), PRETTY_BYTES_IEC));
 361
 362   // check bytes metric printing
 363   EXPECT_EQ(string("853 B "), prettyPrint(853., PRETTY_BYTES_METRIC));
 364   EXPECT_EQ(string("853 kB"), prettyPrint(853.e3, PRETTY_BYTES_METRIC));
 365   EXPECT_EQ(string("853 MB"), prettyPrint(853.e6, PRETTY_BYTES_METRIC));
 366   EXPECT_EQ(string("8.53 GB"), prettyPrint(8.53e9, PRETTY_BYTES_METRIC));
 367   EXPECT_EQ(string("853 GB"), prettyPrint(853.e9, PRETTY_BYTES_METRIC));
 368   EXPECT_EQ(string("853 TB"), prettyPrint(853.e12, PRETTY_BYTES_METRIC));
 369
 370   EXPECT_EQ(string("0 B "), prettyPrint(0, PRETTY_BYTES_METRIC));
 371   EXPECT_EQ(string("1 B "), prettyPrint(1.0, PRETTY_BYTES_METRIC));
 372   EXPECT_EQ(string("1 kB"), prettyPrint(1.0e+3, PRETTY_BYTES_METRIC));
 373   EXPECT_EQ(string("1 MB"), prettyPrint(1.0e+6, PRETTY_BYTES_METRIC));
 374
 375   EXPECT_EQ(string("1 GB"), prettyPrint(1.0e+9, PRETTY_BYTES_METRIC));
 376   EXPECT_EQ(string("1 TB"), prettyPrint(1.0e+12, PRETTY_BYTES_METRIC));
 377
 378   // check metric-units (powers of 1000) printing
 379   EXPECT_EQ(string("853  "), prettyPrint(853., PRETTY_UNITS_METRIC));
 380   EXPECT_EQ(string("853 k"), prettyPrint(853.e3, PRETTY_UNITS_METRIC));
 381   EXPECT_EQ(string("853 M"), prettyPrint(853.e6, PRETTY_UNITS_METRIC));
 382   EXPECT_EQ(string("8.53 bil"), prettyPrint(8.53e9, PRETTY_UNITS_METRIC));
 383   EXPECT_EQ(string("853 bil"), prettyPrint(853.e9, PRETTY_UNITS_METRIC));
 384   EXPECT_EQ(string("853 tril"), prettyPrint(853.e12, PRETTY_UNITS_METRIC));
 385
 386   // check binary-units (powers of 1024) printing
 387   EXPECT_EQ(string("0  "), prettyPrint(0, PRETTY_UNITS_BINARY));
 388   EXPECT_EQ(string("1  "), prettyPrint(pow2(0), PRETTY_UNITS_BINARY));
 389   EXPECT_EQ(string("1 k"), prettyPrint(pow2(10), PRETTY_UNITS_BINARY));
 390   EXPECT_EQ(string("1 M"), prettyPrint(pow2(20), PRETTY_UNITS_BINARY));
 391   EXPECT_EQ(string("1 G"), prettyPrint(pow2(30), PRETTY_UNITS_BINARY));
 392   EXPECT_EQ(string("1 T"), prettyPrint(pow2(40), PRETTY_UNITS_BINARY));
 393
 394   EXPECT_EQ(string("1023  "),
 395       prettyPrint(pow2(10) - 1, PRETTY_UNITS_BINARY));
 396   EXPECT_EQ(string("1024 k"),
 397       prettyPrint(pow2(20) - 1, PRETTY_UNITS_BINARY));
 398   EXPECT_EQ(string("1024 M"),
 399       prettyPrint(pow2(30) - 1, PRETTY_UNITS_BINARY));
 400   EXPECT_EQ(string("1024 G"),
 401       prettyPrint(pow2(40) - 1, PRETTY_UNITS_BINARY));
 402
 403   EXPECT_EQ(string("0   "), prettyPrint(0, PRETTY_UNITS_BINARY_IEC));
 404   EXPECT_EQ(string("1   "), prettyPrint(pow2(0), PRETTY_UNITS_BINARY_IEC));
 405   EXPECT_EQ(string("1 Ki"), prettyPrint(pow2(10), PRETTY_UNITS_BINARY_IEC));
 406   EXPECT_EQ(string("1 Mi"), prettyPrint(pow2(20), PRETTY_UNITS_BINARY_IEC));
 407   EXPECT_EQ(string("1 Gi"), prettyPrint(pow2(30), PRETTY_UNITS_BINARY_IEC));
 408   EXPECT_EQ(string("1 Ti"), prettyPrint(pow2(40), PRETTY_UNITS_BINARY_IEC));
 409
 410   EXPECT_EQ(string("1023   "),
 411       prettyPrint(pow2(10) - 1, PRETTY_UNITS_BINARY_IEC));
 412   EXPECT_EQ(string("1024 Ki"),
 413       prettyPrint(pow2(20) - 1, PRETTY_UNITS_BINARY_IEC));
 414   EXPECT_EQ(string("1024 Mi"),
 415       prettyPrint(pow2(30) - 1, PRETTY_UNITS_BINARY_IEC));
 416   EXPECT_EQ(string("1024 Gi"),
 417       prettyPrint(pow2(40) - 1, PRETTY_UNITS_BINARY_IEC));
 418
 419   // check that negative values work
 420   EXPECT_EQ(string("-85.3 s "), prettyPrint(-85.3, PRETTY_TIME));
 421   EXPECT_EQ(string("-85.3 ms"), prettyPrint(-85.3e-3, PRETTY_TIME));
 422   EXPECT_EQ(string("-85.3 us"), prettyPrint(-85.3e-6, PRETTY_TIME));
 423   EXPECT_EQ(string("-85.3 ns"), prettyPrint(-85.3e-9, PRETTY_TIME));
 424 }
 425
 426 TEST(PrettyPrint, HexDump) {
 427   std::string a("abc\x00\x02\xa0", 6);  // embedded NUL
 428   EXPECT_EQ(
 429     "00000000  61 62 63 00 02 a0                                 "
 430     "|abc...          |\n",
 431     hexDump(a.data(), a.size()));
 432
 433   a = "abcdefghijklmnopqrstuvwxyz";
 434   EXPECT_EQ(
 435     "00000000  61 62 63 64 65 66 67 68  69 6a 6b 6c 6d 6e 6f 70  "
 436     "|abcdefghijklmnop|\n"
 437     "00000010  71 72 73 74 75 76 77 78  79 7a                    "
 438     "|qrstuvwxyz      |\n",
 439     hexDump(a.data(), a.size()));
 440 }
 441
 442 TEST(System, errnoStr) {
 443   errno = EACCES;
 444   EXPECT_EQ(EACCES, errno);
 445   EXPECT_EQ(EACCES, errno);  // twice to make sure EXPECT_EQ doesn't change it
 446
 447   fbstring expected = strerror(ENOENT);
 448
 449   errno = EACCES;
 450   EXPECT_EQ(expected, errnoStr(ENOENT));
 451   // Ensure that errno isn't changed
 452   EXPECT_EQ(EACCES, errno);
 453
 454   // Per POSIX, all errno values are positive, so -1 is invalid
 455   errnoStr(-1);
 456
 457   // Ensure that errno isn't changed
 458   EXPECT_EQ(EACCES, errno);
 459 }
 460
 461 namespace folly_test {
 462 struct ThisIsAVeryLongStructureName {
 463 };
 464 }  // namespace folly_test
 465
 466 TEST(System, demangle) {
 467   EXPECT_EQ("folly_test::ThisIsAVeryLongStructureName",
 468             demangle(typeid(folly_test::ThisIsAVeryLongStructureName)));
 469 }
 470
 471 namespace {
 472
 473 template<template<class,class> class VectorType>
 474 void splitTest() {
 475   VectorType<string,std::allocator<string> > parts;
 476
 477   folly::split(',', "a,b,c", parts);
 478   EXPECT_EQ(parts.size(), 3);
 479   EXPECT_EQ(parts[0], "a");
 480   EXPECT_EQ(parts[1], "b");
 481   EXPECT_EQ(parts[2], "c");
 482   parts.clear();
 483
 484   folly::split(',', string("a,b,c"), parts);
 485   EXPECT_EQ(parts.size(), 3);
 486   EXPECT_EQ(parts[0], "a");
 487   EXPECT_EQ(parts[1], "b");
 488   EXPECT_EQ(parts[2], "c");
 489   parts.clear();
 490
 491   folly::split(',', "a,,c", parts);
 492   EXPECT_EQ(parts.size(), 3);
 493   EXPECT_EQ(parts[0], "a");
 494   EXPECT_EQ(parts[1], "");
 495   EXPECT_EQ(parts[2], "c");
 496   parts.clear();
 497
 498   folly::split(',', string("a,,c"), parts);
 499   EXPECT_EQ(parts.size(), 3);
 500   EXPECT_EQ(parts[0], "a");
 501   EXPECT_EQ(parts[1], "");
 502   EXPECT_EQ(parts[2], "c");
 503   parts.clear();
 504
 505   folly::split(',', "a,,c", parts, true);
 506   EXPECT_EQ(parts.size(), 2);
 507   EXPECT_EQ(parts[0], "a");
 508   EXPECT_EQ(parts[1], "c");
 509   parts.clear();
 510
 511   folly::split(',', string("a,,c"), parts, true);
 512   EXPECT_EQ(parts.size(), 2);
 513   EXPECT_EQ(parts[0], "a");
 514   EXPECT_EQ(parts[1], "c");
 515   parts.clear();
 516
 517   folly::split(',', string(",,a,,c,,,"), parts, true);
 518   EXPECT_EQ(parts.size(), 2);
 519   EXPECT_EQ(parts[0], "a");
 520   EXPECT_EQ(parts[1], "c");
 521   parts.clear();
 522
 523   // test multiple split w/o clear
 524   folly::split(',', ",,a,,c,,,", parts, true);
 525   EXPECT_EQ(parts.size(), 2);
 526   EXPECT_EQ(parts[0], "a");
 527   EXPECT_EQ(parts[1], "c");
 528   folly::split(',', ",,a,,c,,,", parts, true);
 529   EXPECT_EQ(parts.size(), 4);
 530   EXPECT_EQ(parts[2], "a");
 531   EXPECT_EQ(parts[3], "c");
 532   parts.clear();
 533
 534   // test splits that with multi-line delimiter
 535   folly::split("ab", "dabcabkdbkab", parts, true);
 536   EXPECT_EQ(parts.size(), 3);
 537   EXPECT_EQ(parts[0], "d");
 538   EXPECT_EQ(parts[1], "c");
 539   EXPECT_EQ(parts[2], "kdbk");
 540   parts.clear();
 541
 542   string orig = "ab2342asdfv~~!";
 543   folly::split("", orig, parts, true);
 544   EXPECT_EQ(parts.size(), 1);
 545   EXPECT_EQ(parts[0], orig);
 546   parts.clear();
 547
 548   folly::split("452x;o38asfsajsdlfdf.j", "asfds", parts, true);
 549   EXPECT_EQ(parts.size(), 1);
 550   EXPECT_EQ(parts[0], "asfds");
 551   parts.clear();
 552
 553   folly::split("a", "", parts, true);
 554   EXPECT_EQ(parts.size(), 0);
 555   parts.clear();
 556
 557   folly::split("a", "", parts);
 558   EXPECT_EQ(parts.size(), 1);
 559   EXPECT_EQ(parts[0], "");
 560   parts.clear();
 561
 562   folly::split("a", "abcdefg", parts, true);
 563   EXPECT_EQ(parts.size(), 1);
 564   EXPECT_EQ(parts[0], "bcdefg");
 565   parts.clear();
 566
 567   orig = "All, , your bases, are , , belong to us";
 568   folly::split(", ", orig, parts, true);
 569   EXPECT_EQ(parts.size(), 4);
 570   EXPECT_EQ(parts[0], "All");
 571   EXPECT_EQ(parts[1], "your bases");
 572   EXPECT_EQ(parts[2], "are ");
 573   EXPECT_EQ(parts[3], "belong to us");
 574   parts.clear();
 575   folly::split(", ", orig, parts);
 576   EXPECT_EQ(parts.size(), 6);
 577   EXPECT_EQ(parts[0], "All");
 578   EXPECT_EQ(parts[1], "");
 579   EXPECT_EQ(parts[2], "your bases");
 580   EXPECT_EQ(parts[3], "are ");
 581   EXPECT_EQ(parts[4], "");
 582   EXPECT_EQ(parts[5], "belong to us");
 583   parts.clear();
 584
 585   orig = ", Facebook, rul,es!, ";
 586   folly::split(", ", orig, parts, true);
 587   EXPECT_EQ(parts.size(), 2);
 588   EXPECT_EQ(parts[0], "Facebook");
 589   EXPECT_EQ(parts[1], "rul,es!");
 590   parts.clear();
 591   folly::split(", ", orig, parts);
 592   EXPECT_EQ(parts.size(), 4);
 593   EXPECT_EQ(parts[0], "");
 594   EXPECT_EQ(parts[1], "Facebook");
 595   EXPECT_EQ(parts[2], "rul,es!");
 596   EXPECT_EQ(parts[3], "");
 597 }
 598
 599 template<template<class,class> class VectorType>
 600 void piecesTest() {
 601   VectorType<StringPiece,std::allocator<StringPiece> > pieces;
 602   VectorType<StringPiece,std::allocator<StringPiece> > pieces2;
 603
 604   folly::split(',', "a,b,c", pieces);
 605   EXPECT_EQ(pieces.size(), 3);
 606   EXPECT_EQ(pieces[0], "a");
 607   EXPECT_EQ(pieces[1], "b");
 608   EXPECT_EQ(pieces[2], "c");
 609
 610   pieces.clear();
 611
 612   folly::split(',', "a,,c", pieces);
 613   EXPECT_EQ(pieces.size(), 3);
 614   EXPECT_EQ(pieces[0], "a");
 615   EXPECT_EQ(pieces[1], "");
 616   EXPECT_EQ(pieces[2], "c");
 617   pieces.clear();
 618
 619   folly::split(',', "a,,c", pieces, true);
 620   EXPECT_EQ(pieces.size(), 2);
 621   EXPECT_EQ(pieces[0], "a");
 622   EXPECT_EQ(pieces[1], "c");
 623   pieces.clear();
 624
 625   folly::split(',', ",,a,,c,,,", pieces, true);
 626   EXPECT_EQ(pieces.size(), 2);
 627   EXPECT_EQ(pieces[0], "a");
 628   EXPECT_EQ(pieces[1], "c");
 629   pieces.clear();
 630
 631   // test multiple split w/o clear
 632   folly::split(',', ",,a,,c,,,", pieces, true);
 633   EXPECT_EQ(pieces.size(), 2);
 634   EXPECT_EQ(pieces[0], "a");
 635   EXPECT_EQ(pieces[1], "c");
 636   folly::split(',', ",,a,,c,,,", pieces, true);
 637   EXPECT_EQ(pieces.size(), 4);
 638   EXPECT_EQ(pieces[2], "a");
 639   EXPECT_EQ(pieces[3], "c");
 640   pieces.clear();
 641
 642   // test multiple split rounds
 643   folly::split(",", "a_b,c_d", pieces);
 644   EXPECT_EQ(pieces.size(), 2);
 645   EXPECT_EQ(pieces[0], "a_b");
 646   EXPECT_EQ(pieces[1], "c_d");
 647   folly::split("_", pieces[0], pieces2);
 648   EXPECT_EQ(pieces2.size(), 2);
 649   EXPECT_EQ(pieces2[0], "a");
 650   EXPECT_EQ(pieces2[1], "b");
 651   pieces2.clear();
 652   folly::split("_", pieces[1], pieces2);
 653   EXPECT_EQ(pieces2.size(), 2);
 654   EXPECT_EQ(pieces2[0], "c");
 655   EXPECT_EQ(pieces2[1], "d");
 656   pieces.clear();
 657   pieces2.clear();
 658
 659   // test splits that with multi-line delimiter
 660   folly::split("ab", "dabcabkdbkab", pieces, true);
 661   EXPECT_EQ(pieces.size(), 3);
 662   EXPECT_EQ(pieces[0], "d");
 663   EXPECT_EQ(pieces[1], "c");
 664   EXPECT_EQ(pieces[2], "kdbk");
 665   pieces.clear();
 666
 667   string orig = "ab2342asdfv~~!";
 668   folly::split("", orig.c_str(), pieces, true);
 669   EXPECT_EQ(pieces.size(), 1);
 670   EXPECT_EQ(pieces[0], orig);
 671   pieces.clear();
 672
 673   folly::split("452x;o38asfsajsdlfdf.j", "asfds", pieces, true);
 674   EXPECT_EQ(pieces.size(), 1);
 675   EXPECT_EQ(pieces[0], "asfds");
 676   pieces.clear();
 677
 678   folly::split("a", "", pieces, true);
 679   EXPECT_EQ(pieces.size(), 0);
 680   pieces.clear();
 681
 682   folly::split("a", "", pieces);
 683   EXPECT_EQ(pieces.size(), 1);
 684   EXPECT_EQ(pieces[0], "");
 685   pieces.clear();
 686
 687   folly::split("a", "abcdefg", pieces, true);
 688   EXPECT_EQ(pieces.size(), 1);
 689   EXPECT_EQ(pieces[0], "bcdefg");
 690   pieces.clear();
 691
 692   orig = "All, , your bases, are , , belong to us";
 693   folly::split(", ", orig, pieces, true);
 694   EXPECT_EQ(pieces.size(), 4);
 695   EXPECT_EQ(pieces[0], "All");
 696   EXPECT_EQ(pieces[1], "your bases");
 697   EXPECT_EQ(pieces[2], "are ");
 698   EXPECT_EQ(pieces[3], "belong to us");
 699   pieces.clear();
 700   folly::split(", ", orig, pieces);
 701   EXPECT_EQ(pieces.size(), 6);
 702   EXPECT_EQ(pieces[0], "All");
 703   EXPECT_EQ(pieces[1], "");
 704   EXPECT_EQ(pieces[2], "your bases");
 705   EXPECT_EQ(pieces[3], "are ");
 706   EXPECT_EQ(pieces[4], "");
 707   EXPECT_EQ(pieces[5], "belong to us");
 708   pieces.clear();
 709
 710   orig = ", Facebook, rul,es!, ";
 711   folly::split(", ", orig, pieces, true);
 712   EXPECT_EQ(pieces.size(), 2);
 713   EXPECT_EQ(pieces[0], "Facebook");
 714   EXPECT_EQ(pieces[1], "rul,es!");
 715   pieces.clear();
 716   folly::split(", ", orig, pieces);
 717   EXPECT_EQ(pieces.size(), 4);
 718   EXPECT_EQ(pieces[0], "");
 719   EXPECT_EQ(pieces[1], "Facebook");
 720   EXPECT_EQ(pieces[2], "rul,es!");
 721   EXPECT_EQ(pieces[3], "");
 722   pieces.clear();
 723
 724   const char* str = "a,b";
 725   folly::split(',', StringPiece(str), pieces);
 726   EXPECT_EQ(pieces.size(), 2);
 727   EXPECT_EQ(pieces[0], "a");
 728   EXPECT_EQ(pieces[1], "b");
 729   EXPECT_EQ(pieces[0].start(), str);
 730   EXPECT_EQ(pieces[1].start(), str + 2);
 731
 732   std::set<StringPiece> unique;
 733   folly::splitTo<StringPiece>(":", "asd:bsd:asd:asd:bsd:csd::asd",
 734     std::inserter(unique, unique.begin()), true);
 735   EXPECT_EQ(unique.size(), 3);
 736   if (unique.size() == 3) {
 737     EXPECT_EQ(*unique.begin(), "asd");
 738     EXPECT_EQ(*--unique.end(), "csd");
 739   }
 740
 741   VectorType<fbstring,std::allocator<fbstring> > blah;
 742   folly::split('-', "a-b-c-d-f-e", blah);
 743   EXPECT_EQ(blah.size(), 6);
 744 }
 745
 746 }
 747
 748 TEST(Split, split_vector) {
 749   splitTest<std::vector>();
 750 }
 751 TEST(Split, split_fbvector) {
 752   splitTest<folly::fbvector>();
 753 }
 754 TEST(Split, pieces_vector) {
 755   piecesTest<std::vector>();
 756 }
 757 TEST(Split, pieces_fbvector) {
 758   piecesTest<folly::fbvector>();
 759 }
 760
 761 TEST(String, join) {
 762   string output;
 763
 764   std::vector<int> empty = { };
 765   join(":", empty, output);
 766   EXPECT_TRUE(output.empty());
 767
 768   std::vector<std::string> input1 = { "1", "23", "456", "" };
 769   join(':', input1, output);
 770   EXPECT_EQ(output, "1:23:456:");
 771   output = join(':', input1);
 772   EXPECT_EQ(output, "1:23:456:");
 773
 774   auto input2 = { 1, 23, 456 };
 775   join("-*-", input2, output);
 776   EXPECT_EQ(output, "1-*-23-*-456");
 777   output = join("-*-", input2);
 778   EXPECT_EQ(output, "1-*-23-*-456");
 779
 780   auto input3 = { 'f', 'a', 'c', 'e', 'b', 'o', 'o', 'k' };
 781   join("", input3, output);
 782   EXPECT_EQ(output, "facebook");
 783 }
 784
 785 TEST(String, hexlify) {
 786   string input1 = "0123";
 787   string output1;
 788   EXPECT_TRUE(hexlify(input1, output1));
 789   EXPECT_EQ(output1, "30313233");
 790
 791   fbstring input2 = "abcdefg";
 792   input2[1] = 0;
 793   input2[3] = 0xff;
 794   input2[5] = 0xb6;
 795   fbstring output2;
 796   EXPECT_TRUE(hexlify(input2, output2));
 797   EXPECT_EQ(output2, "610063ff65b667");
 798 }
 799
 800 TEST(String, unhexlify) {
 801   string input1 = "30313233";
 802   string output1;
 803   EXPECT_TRUE(unhexlify(input1, output1));
 804   EXPECT_EQ(output1, "0123");
 805
 806   fbstring input2 = "610063ff65b667";
 807   fbstring output2;
 808   EXPECT_TRUE(unhexlify(input2, output2));
 809   EXPECT_EQ(output2.size(), 7);
 810   EXPECT_EQ(output2[0], 'a');
 811   EXPECT_EQ(output2[1], 0);
 812   EXPECT_EQ(output2[2], 'c');
 813   EXPECT_EQ(output2[3] & 0xff, 0xff);
 814   EXPECT_EQ(output2[4], 'e');
 815   EXPECT_EQ(output2[5] & 0xff, 0xb6);
 816   EXPECT_EQ(output2[6], 'g');
 817
 818   string input3 = "x";
 819   string output3;
 820   EXPECT_FALSE(unhexlify(input3, output3));
 821
 822   string input4 = "xy";
 823   string output4;
 824   EXPECT_FALSE(unhexlify(input4, output4));
 825 }
 826
 827 TEST(String, backslashify) {
 828   EXPECT_EQ("abc", string("abc"));
 829   EXPECT_EQ("abc", backslashify(string("abc")));
 830   EXPECT_EQ("abc\\r", backslashify(string("abc\r")));
 831   EXPECT_EQ("abc\\x0d", backslashify(string("abc\r"), true));
 832   EXPECT_EQ("\\0\\0", backslashify(string(2, '\0')));
 833 }
 834
 835 TEST(String, humanify) {
 836   // Simple cases; output is obvious.
 837   EXPECT_EQ("abc", humanify(string("abc")));
 838   EXPECT_EQ("abc\\\\r", humanify(string("abc\\r")));
 839   EXPECT_EQ("0xff", humanify(string("\xff")));
 840   EXPECT_EQ("abc\\xff", humanify(string("abc\xff")));
 841   EXPECT_EQ("abc\\b", humanify(string("abc\b")));
 842   EXPECT_EQ("0x00", humanify(string(1, '\0')));
 843   EXPECT_EQ("0x0000", humanify(string(2, '\0')));
 844
 845
 846   // Mostly printable, so backslash!  80, 60, and 40% printable, respectively
 847   EXPECT_EQ("aaaa\\xff", humanify(string("aaaa\xff")));
 848   EXPECT_EQ("aaa\\xff\\xff", humanify(string("aaa\xff\xff")));
 849   EXPECT_EQ("aa\\xff\\xff\\xff", humanify(string("aa\xff\xff\xff")));
 850
 851   // 20% printable, and the printable portion isn't the prefix; hexify!
 852   EXPECT_EQ("0xff61ffffff", humanify(string("\xff" "a\xff\xff\xff")));
 853
 854   // Same as previous, except swap first two chars; prefix is
 855   // printable and within the threshold, so backslashify.
 856   EXPECT_EQ("a\\xff\\xff\\xff\\xff", humanify(string("a\xff\xff\xff\xff")));
 857
 858   // Just too much unprintable; hex, despite prefix.
 859   EXPECT_EQ("0x61ffffffffff", humanify(string("a\xff\xff\xff\xff\xff")));
 860 }
 861
 862 //////////////////////////////////////////////////////////////////////
 863
 864 BENCHMARK(splitOnSingleChar, iters) {
 865   static const std::string line = "one:two:three:four";
 866   for (int i = 0; i < iters << 4; ++i) {
 867     std::vector<StringPiece> pieces;
 868     folly::split(':', line, pieces);
 869   }
 870 }
 871
 872 BENCHMARK(splitStr, iters) {
 873   static const std::string line = "one-*-two-*-three-*-four";
 874   for (int i = 0; i < iters << 4; ++i) {
 875     std::vector<StringPiece> pieces;
 876     folly::split("-*-", line, pieces);
 877   }
 878 }
 879
 880 BENCHMARK(boost_splitOnSingleChar, iters) {
 881   static const std::string line = "one:two:three:four";
 882   for (int i = 0; i < iters << 4; ++i) {
 883     std::vector<boost::iterator_range<std::string::const_iterator> > pieces;
 884     boost::split(pieces, line, [] (char c) { return c == ':'; });
 885   }
 886 }
 887
 888 BENCHMARK(joinCharStr, iters) {
 889   static const std::vector<std::string> input = {
 890     "one", "two", "three", "four", "five", "six", "seven" };
 891   for (int i = 0; i < iters << 4; ++i) {
 892     std::string output;
 893     folly::join(':', input, output);
 894   }
 895 }
 896
 897 BENCHMARK(joinStrStr, iters) {
 898   static const std::vector<std::string> input = {
 899     "one", "two", "three", "four", "five", "six", "seven" };
 900   for (int i = 0; i < iters << 4; ++i) {
 901     std::string output;
 902     folly::join(":", input, output);
 903   }
 904 }
 905
 906 BENCHMARK(joinInt, iters) {
 907   static const auto input = {
 908     123, 456, 78910, 1112, 1314, 151, 61718 };
 909   for (int i = 0; i < iters << 4; ++i) {
 910     std::string output;
 911     folly::join(":", input, output);
 912   }
 913 }
 914
 915 int main(int argc, char *argv[]) {
 916   testing::InitGoogleTest(&argc, argv);
 917   google::ParseCommandLineFlags(&argc, &argv, true);
 918   auto ret = RUN_ALL_TESTS();
 919   if (!ret) {
 920     initBenchmark();
 921     if (FLAGS_benchmark) {
 922       folly::runBenchmarks();
 923     }
 924   }
 925   return ret;
 926 }
 927