src/external/googletest/googletest/test/googletest-port-test.cc

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   9 // notice, this list of conditions and the following disclaimer.
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  29 //
  30 // This file tests the internal cross-platform support utilities.
  31 #include <stdio.h>
  32
  33 #include "gtest/internal/gtest-port.h"
  34
  35 #if GTEST_OS_MAC
  36 # include <time.h>
  37 #endif  // GTEST_OS_MAC
  38
  39 #include <list>
  40 #include <memory>
  41 #include <utility>  // For std::pair and std::make_pair.
  42 #include <vector>
  43
  44 #include "gtest/gtest.h"
  45 #include "gtest/gtest-spi.h"
  46 #include "src/gtest-internal-inl.h"
  47
  48 using std::make_pair;
  49 using std::pair;
  50
  51 namespace testing {
  52 namespace internal {
  53
  54 TEST(IsXDigitTest, WorksForNarrowAscii) {
  55   EXPECT_TRUE(IsXDigit('0'));
  56   EXPECT_TRUE(IsXDigit('9'));
  57   EXPECT_TRUE(IsXDigit('A'));
  58   EXPECT_TRUE(IsXDigit('F'));
  59   EXPECT_TRUE(IsXDigit('a'));
  60   EXPECT_TRUE(IsXDigit('f'));
  61
  62   EXPECT_FALSE(IsXDigit('-'));
  63   EXPECT_FALSE(IsXDigit('g'));
  64   EXPECT_FALSE(IsXDigit('G'));
  65 }
  66
  67 TEST(IsXDigitTest, ReturnsFalseForNarrowNonAscii) {
  68   EXPECT_FALSE(IsXDigit(static_cast<char>('\x80')));
  69   EXPECT_FALSE(IsXDigit(static_cast<char>('0' | '\x80')));
  70 }
  71
  72 TEST(IsXDigitTest, WorksForWideAscii) {
  73   EXPECT_TRUE(IsXDigit(L'0'));
  74   EXPECT_TRUE(IsXDigit(L'9'));
  75   EXPECT_TRUE(IsXDigit(L'A'));
  76   EXPECT_TRUE(IsXDigit(L'F'));
  77   EXPECT_TRUE(IsXDigit(L'a'));
  78   EXPECT_TRUE(IsXDigit(L'f'));
  79
  80   EXPECT_FALSE(IsXDigit(L'-'));
  81   EXPECT_FALSE(IsXDigit(L'g'));
  82   EXPECT_FALSE(IsXDigit(L'G'));
  83 }
  84
  85 TEST(IsXDigitTest, ReturnsFalseForWideNonAscii) {
  86   EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(0x80)));
  87   EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(L'0' | 0x80)));
  88   EXPECT_FALSE(IsXDigit(static_cast<wchar_t>(L'0' | 0x100)));
  89 }
  90
  91 class Base {
  92  public:
  93   Base() : member_(0) {}
  94   explicit Base(int n) : member_(n) {}
  95   Base(const Base&) = default;
  96   Base& operator=(const Base&) = default;
  97   virtual ~Base() {}
  98   int member() { return member_; }
  99
 100  private:
 101   int member_;
 102 };
 103
 104 class Derived : public Base {
 105  public:
 106   explicit Derived(int n) : Base(n) {}
 107 };
 108
 109 TEST(ImplicitCastTest, ConvertsPointers) {
 110   Derived derived(0);
 111   EXPECT_TRUE(&derived == ::testing::internal::ImplicitCast_<Base*>(&derived));
 112 }
 113
 114 TEST(ImplicitCastTest, CanUseInheritance) {
 115   Derived derived(1);
 116   Base base = ::testing::internal::ImplicitCast_<Base>(derived);
 117   EXPECT_EQ(derived.member(), base.member());
 118 }
 119
 120 class Castable {
 121  public:
 122   explicit Castable(bool* converted) : converted_(converted) {}
 123   operator Base() {
 124     *converted_ = true;
 125     return Base();
 126   }
 127
 128  private:
 129   bool* converted_;
 130 };
 131
 132 TEST(ImplicitCastTest, CanUseNonConstCastOperator) {
 133   bool converted = false;
 134   Castable castable(&converted);
 135   Base base = ::testing::internal::ImplicitCast_<Base>(castable);
 136   EXPECT_TRUE(converted);
 137 }
 138
 139 class ConstCastable {
 140  public:
 141   explicit ConstCastable(bool* converted) : converted_(converted) {}
 142   operator Base() const {
 143     *converted_ = true;
 144     return Base();
 145   }
 146
 147  private:
 148   bool* converted_;
 149 };
 150
 151 TEST(ImplicitCastTest, CanUseConstCastOperatorOnConstValues) {
 152   bool converted = false;
 153   const ConstCastable const_castable(&converted);
 154   Base base = ::testing::internal::ImplicitCast_<Base>(const_castable);
 155   EXPECT_TRUE(converted);
 156 }
 157
 158 class ConstAndNonConstCastable {
 159  public:
 160   ConstAndNonConstCastable(bool* converted, bool* const_converted)
 161       : converted_(converted), const_converted_(const_converted) {}
 162   operator Base() {
 163     *converted_ = true;
 164     return Base();
 165   }
 166   operator Base() const {
 167     *const_converted_ = true;
 168     return Base();
 169   }
 170
 171  private:
 172   bool* converted_;
 173   bool* const_converted_;
 174 };
 175
 176 TEST(ImplicitCastTest, CanSelectBetweenConstAndNonConstCasrAppropriately) {
 177   bool converted = false;
 178   bool const_converted = false;
 179   ConstAndNonConstCastable castable(&converted, &const_converted);
 180   Base base = ::testing::internal::ImplicitCast_<Base>(castable);
 181   EXPECT_TRUE(converted);
 182   EXPECT_FALSE(const_converted);
 183
 184   converted = false;
 185   const_converted = false;
 186   const ConstAndNonConstCastable const_castable(&converted, &const_converted);
 187   base = ::testing::internal::ImplicitCast_<Base>(const_castable);
 188   EXPECT_FALSE(converted);
 189   EXPECT_TRUE(const_converted);
 190 }
 191
 192 class To {
 193  public:
 194   To(bool* converted) { *converted = true; }  // NOLINT
 195 };
 196
 197 TEST(ImplicitCastTest, CanUseImplicitConstructor) {
 198   bool converted = false;
 199   To to = ::testing::internal::ImplicitCast_<To>(&converted);
 200   (void)to;
 201   EXPECT_TRUE(converted);
 202 }
 203
 204 // The following code intentionally tests a suboptimal syntax.
 205 #ifdef __GNUC__
 206 #pragma GCC diagnostic push
 207 #pragma GCC diagnostic ignored "-Wdangling-else"
 208 #pragma GCC diagnostic ignored "-Wempty-body"
 209 #pragma GCC diagnostic ignored "-Wpragmas"
 210 #endif
 211 TEST(GtestCheckSyntaxTest, BehavesLikeASingleStatement) {
 212   if (AlwaysFalse())
 213     GTEST_CHECK_(false) << "This should never be executed; "
 214                            "It's a compilation test only.";
 215
 216   if (AlwaysTrue())
 217     GTEST_CHECK_(true);
 218   else
 219     ;  // NOLINT
 220
 221   if (AlwaysFalse())
 222     ;  // NOLINT
 223   else
 224     GTEST_CHECK_(true) << "";
 225 }
 226 #ifdef __GNUC__
 227 #pragma GCC diagnostic pop
 228 #endif
 229
 230 TEST(GtestCheckSyntaxTest, WorksWithSwitch) {
 231   switch (0) {
 232     case 1:
 233       break;
 234     default:
 235       GTEST_CHECK_(true);
 236   }
 237
 238   switch (0)
 239     case 0:
 240       GTEST_CHECK_(true) << "Check failed in switch case";
 241 }
 242
 243 // Verifies behavior of FormatFileLocation.
 244 TEST(FormatFileLocationTest, FormatsFileLocation) {
 245   EXPECT_PRED_FORMAT2(IsSubstring, "foo.cc", FormatFileLocation("foo.cc", 42));
 246   EXPECT_PRED_FORMAT2(IsSubstring, "42", FormatFileLocation("foo.cc", 42));
 247 }
 248
 249 TEST(FormatFileLocationTest, FormatsUnknownFile) {
 250   EXPECT_PRED_FORMAT2(IsSubstring, "unknown file",
 251                       FormatFileLocation(nullptr, 42));
 252   EXPECT_PRED_FORMAT2(IsSubstring, "42", FormatFileLocation(nullptr, 42));
 253 }
 254
 255 TEST(FormatFileLocationTest, FormatsUknownLine) {
 256   EXPECT_EQ("foo.cc:", FormatFileLocation("foo.cc", -1));
 257 }
 258
 259 TEST(FormatFileLocationTest, FormatsUknownFileAndLine) {
 260   EXPECT_EQ("unknown file:", FormatFileLocation(nullptr, -1));
 261 }
 262
 263 // Verifies behavior of FormatCompilerIndependentFileLocation.
 264 TEST(FormatCompilerIndependentFileLocationTest, FormatsFileLocation) {
 265   EXPECT_EQ("foo.cc:42", FormatCompilerIndependentFileLocation("foo.cc", 42));
 266 }
 267
 268 TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownFile) {
 269   EXPECT_EQ("unknown file:42",
 270             FormatCompilerIndependentFileLocation(nullptr, 42));
 271 }
 272
 273 TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownLine) {
 274   EXPECT_EQ("foo.cc", FormatCompilerIndependentFileLocation("foo.cc", -1));
 275 }
 276
 277 TEST(FormatCompilerIndependentFileLocationTest, FormatsUknownFileAndLine) {
 278   EXPECT_EQ("unknown file", FormatCompilerIndependentFileLocation(nullptr, -1));
 279 }
 280
 281 #if GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_QNX || GTEST_OS_FUCHSIA || \
 282     GTEST_OS_DRAGONFLY || GTEST_OS_FREEBSD || GTEST_OS_GNU_KFREEBSD || \
 283     GTEST_OS_NETBSD || GTEST_OS_OPENBSD || GTEST_OS_GNU_HURD
 284 void* ThreadFunc(void* data) {
 285   internal::Mutex* mutex = static_cast<internal::Mutex*>(data);
 286   mutex->Lock();
 287   mutex->Unlock();
 288   return nullptr;
 289 }
 290
 291 TEST(GetThreadCountTest, ReturnsCorrectValue) {
 292   size_t starting_count;
 293   size_t thread_count_after_create;
 294   size_t thread_count_after_join;
 295
 296   // We can't guarantee that no other thread was created or destroyed between
 297   // any two calls to GetThreadCount(). We make multiple attempts, hoping that
 298   // background noise is not constant and we would see the "right" values at
 299   // some point.
 300   for (int attempt = 0; attempt < 20; ++attempt) {
 301     starting_count = GetThreadCount();
 302     pthread_t thread_id;
 303
 304     internal::Mutex mutex;
 305     {
 306       internal::MutexLock lock(&mutex);
 307       pthread_attr_t attr;
 308       ASSERT_EQ(0, pthread_attr_init(&attr));
 309       ASSERT_EQ(0, pthread_attr_setdetachstate(&attr, PTHREAD_CREATE_JOINABLE));
 310
 311       const int status = pthread_create(&thread_id, &attr, &ThreadFunc, &mutex);
 312       ASSERT_EQ(0, pthread_attr_destroy(&attr));
 313       ASSERT_EQ(0, status);
 314     }
 315
 316     thread_count_after_create = GetThreadCount();
 317
 318     void* dummy;
 319     ASSERT_EQ(0, pthread_join(thread_id, &dummy));
 320
 321     // Join before we decide whether we need to retry the test. Retry if an
 322     // arbitrary other thread was created or destroyed in the meantime.
 323     if (thread_count_after_create != starting_count + 1) continue;
 324
 325     // The OS may not immediately report the updated thread count after
 326     // joining a thread, causing flakiness in this test. To counter that, we
 327     // wait for up to .5 seconds for the OS to report the correct value.
 328     bool thread_count_matches = false;
 329     for (int i = 0; i < 5; ++i) {
 330       thread_count_after_join = GetThreadCount();
 331       if (thread_count_after_join == starting_count) {
 332         thread_count_matches = true;
 333         break;
 334       }
 335
 336       SleepMilliseconds(100);
 337     }
 338
 339     // Retry if an arbitrary other thread was created or destroyed.
 340     if (!thread_count_matches) continue;
 341
 342     break;
 343   }
 344
 345   EXPECT_EQ(thread_count_after_create, starting_count + 1);
 346   EXPECT_EQ(thread_count_after_join, starting_count);
 347 }
 348 #else
 349 TEST(GetThreadCountTest, ReturnsZeroWhenUnableToCountThreads) {
 350   EXPECT_EQ(0U, GetThreadCount());
 351 }
 352 #endif  // GTEST_OS_LINUX || GTEST_OS_MAC || GTEST_OS_QNX || GTEST_OS_FUCHSIA
 353
 354 TEST(GtestCheckDeathTest, DiesWithCorrectOutputOnFailure) {
 355   const bool a_false_condition = false;
 356   const char regex[] =
 357 #ifdef _MSC_VER
 358      "googletest-port-test\\.cc\\(\\d+\\):"
 359 #elif GTEST_USES_POSIX_RE
 360      "googletest-port-test\\.cc:[0-9]+"
 361 #else
 362      "googletest-port-test\\.cc:\\d+"
 363 #endif  // _MSC_VER
 364      ".*a_false_condition.*Extra info.*";
 365
 366   EXPECT_DEATH_IF_SUPPORTED(GTEST_CHECK_(a_false_condition) << "Extra info",
 367                             regex);
 368 }
 369
 370 #if GTEST_HAS_DEATH_TEST
 371
 372 TEST(GtestCheckDeathTest, LivesSilentlyOnSuccess) {
 373   EXPECT_EXIT({
 374       GTEST_CHECK_(true) << "Extra info";
 375       ::std::cerr << "Success\n";
 376       exit(0); },
 377       ::testing::ExitedWithCode(0), "Success");
 378 }
 379
 380 #endif  // GTEST_HAS_DEATH_TEST
 381
 382 // Verifies that Google Test choose regular expression engine appropriate to
 383 // the platform. The test will produce compiler errors in case of failure.
 384 // For simplicity, we only cover the most important platforms here.
 385 TEST(RegexEngineSelectionTest, SelectsCorrectRegexEngine) {
 386 #if !GTEST_USES_PCRE
 387 # if GTEST_HAS_POSIX_RE
 388
 389   EXPECT_TRUE(GTEST_USES_POSIX_RE);
 390
 391 # else
 392
 393   EXPECT_TRUE(GTEST_USES_SIMPLE_RE);
 394
 395 # endif
 396 #endif  // !GTEST_USES_PCRE
 397 }
 398
 399 #if GTEST_USES_POSIX_RE
 400
 401 template <typename Str>
 402 class RETest : public ::testing::Test {};
 403
 404 // Defines StringTypes as the list of all string types that class RE
 405 // supports.
 406 typedef testing::Types< ::std::string, const char*> StringTypes;
 407
 408 TYPED_TEST_SUITE(RETest, StringTypes);
 409
 410 // Tests RE's implicit constructors.
 411 TYPED_TEST(RETest, ImplicitConstructorWorks) {
 412   const RE empty(TypeParam(""));
 413   EXPECT_STREQ("", empty.pattern());
 414
 415   const RE simple(TypeParam("hello"));
 416   EXPECT_STREQ("hello", simple.pattern());
 417
 418   const RE normal(TypeParam(".*(\\w+)"));
 419   EXPECT_STREQ(".*(\\w+)", normal.pattern());
 420 }
 421
 422 // Tests that RE's constructors reject invalid regular expressions.
 423 TYPED_TEST(RETest, RejectsInvalidRegex) {
 424   EXPECT_NONFATAL_FAILURE({
 425     const RE invalid(TypeParam("?"));
 426   }, "\"?\" is not a valid POSIX Extended regular expression.");
 427 }
 428
 429 // Tests RE::FullMatch().
 430 TYPED_TEST(RETest, FullMatchWorks) {
 431   const RE empty(TypeParam(""));
 432   EXPECT_TRUE(RE::FullMatch(TypeParam(""), empty));
 433   EXPECT_FALSE(RE::FullMatch(TypeParam("a"), empty));
 434
 435   const RE re(TypeParam("a.*z"));
 436   EXPECT_TRUE(RE::FullMatch(TypeParam("az"), re));
 437   EXPECT_TRUE(RE::FullMatch(TypeParam("axyz"), re));
 438   EXPECT_FALSE(RE::FullMatch(TypeParam("baz"), re));
 439   EXPECT_FALSE(RE::FullMatch(TypeParam("azy"), re));
 440 }
 441
 442 // Tests RE::PartialMatch().
 443 TYPED_TEST(RETest, PartialMatchWorks) {
 444   const RE empty(TypeParam(""));
 445   EXPECT_TRUE(RE::PartialMatch(TypeParam(""), empty));
 446   EXPECT_TRUE(RE::PartialMatch(TypeParam("a"), empty));
 447
 448   const RE re(TypeParam("a.*z"));
 449   EXPECT_TRUE(RE::PartialMatch(TypeParam("az"), re));
 450   EXPECT_TRUE(RE::PartialMatch(TypeParam("axyz"), re));
 451   EXPECT_TRUE(RE::PartialMatch(TypeParam("baz"), re));
 452   EXPECT_TRUE(RE::PartialMatch(TypeParam("azy"), re));
 453   EXPECT_FALSE(RE::PartialMatch(TypeParam("zza"), re));
 454 }
 455
 456 #elif GTEST_USES_SIMPLE_RE
 457
 458 TEST(IsInSetTest, NulCharIsNotInAnySet) {
 459   EXPECT_FALSE(IsInSet('\0', ""));
 460   EXPECT_FALSE(IsInSet('\0', "\0"));
 461   EXPECT_FALSE(IsInSet('\0', "a"));
 462 }
 463
 464 TEST(IsInSetTest, WorksForNonNulChars) {
 465   EXPECT_FALSE(IsInSet('a', "Ab"));
 466   EXPECT_FALSE(IsInSet('c', ""));
 467
 468   EXPECT_TRUE(IsInSet('b', "bcd"));
 469   EXPECT_TRUE(IsInSet('b', "ab"));
 470 }
 471
 472 TEST(IsAsciiDigitTest, IsFalseForNonDigit) {
 473   EXPECT_FALSE(IsAsciiDigit('\0'));
 474   EXPECT_FALSE(IsAsciiDigit(' '));
 475   EXPECT_FALSE(IsAsciiDigit('+'));
 476   EXPECT_FALSE(IsAsciiDigit('-'));
 477   EXPECT_FALSE(IsAsciiDigit('.'));
 478   EXPECT_FALSE(IsAsciiDigit('a'));
 479 }
 480
 481 TEST(IsAsciiDigitTest, IsTrueForDigit) {
 482   EXPECT_TRUE(IsAsciiDigit('0'));
 483   EXPECT_TRUE(IsAsciiDigit('1'));
 484   EXPECT_TRUE(IsAsciiDigit('5'));
 485   EXPECT_TRUE(IsAsciiDigit('9'));
 486 }
 487
 488 TEST(IsAsciiPunctTest, IsFalseForNonPunct) {
 489   EXPECT_FALSE(IsAsciiPunct('\0'));
 490   EXPECT_FALSE(IsAsciiPunct(' '));
 491   EXPECT_FALSE(IsAsciiPunct('\n'));
 492   EXPECT_FALSE(IsAsciiPunct('a'));
 493   EXPECT_FALSE(IsAsciiPunct('0'));
 494 }
 495
 496 TEST(IsAsciiPunctTest, IsTrueForPunct) {
 497   for (const char* p = "^-!\"#$%&'()*+,./:;<=>?@[\\]_`{|}~"; *p; p++) {
 498     EXPECT_PRED1(IsAsciiPunct, *p);
 499   }
 500 }
 501
 502 TEST(IsRepeatTest, IsFalseForNonRepeatChar) {
 503   EXPECT_FALSE(IsRepeat('\0'));
 504   EXPECT_FALSE(IsRepeat(' '));
 505   EXPECT_FALSE(IsRepeat('a'));
 506   EXPECT_FALSE(IsRepeat('1'));
 507   EXPECT_FALSE(IsRepeat('-'));
 508 }
 509
 510 TEST(IsRepeatTest, IsTrueForRepeatChar) {
 511   EXPECT_TRUE(IsRepeat('?'));
 512   EXPECT_TRUE(IsRepeat('*'));
 513   EXPECT_TRUE(IsRepeat('+'));
 514 }
 515
 516 TEST(IsAsciiWhiteSpaceTest, IsFalseForNonWhiteSpace) {
 517   EXPECT_FALSE(IsAsciiWhiteSpace('\0'));
 518   EXPECT_FALSE(IsAsciiWhiteSpace('a'));
 519   EXPECT_FALSE(IsAsciiWhiteSpace('1'));
 520   EXPECT_FALSE(IsAsciiWhiteSpace('+'));
 521   EXPECT_FALSE(IsAsciiWhiteSpace('_'));
 522 }
 523
 524 TEST(IsAsciiWhiteSpaceTest, IsTrueForWhiteSpace) {
 525   EXPECT_TRUE(IsAsciiWhiteSpace(' '));
 526   EXPECT_TRUE(IsAsciiWhiteSpace('\n'));
 527   EXPECT_TRUE(IsAsciiWhiteSpace('\r'));
 528   EXPECT_TRUE(IsAsciiWhiteSpace('\t'));
 529   EXPECT_TRUE(IsAsciiWhiteSpace('\v'));
 530   EXPECT_TRUE(IsAsciiWhiteSpace('\f'));
 531 }
 532
 533 TEST(IsAsciiWordCharTest, IsFalseForNonWordChar) {
 534   EXPECT_FALSE(IsAsciiWordChar('\0'));
 535   EXPECT_FALSE(IsAsciiWordChar('+'));
 536   EXPECT_FALSE(IsAsciiWordChar('.'));
 537   EXPECT_FALSE(IsAsciiWordChar(' '));
 538   EXPECT_FALSE(IsAsciiWordChar('\n'));
 539 }
 540
 541 TEST(IsAsciiWordCharTest, IsTrueForLetter) {
 542   EXPECT_TRUE(IsAsciiWordChar('a'));
 543   EXPECT_TRUE(IsAsciiWordChar('b'));
 544   EXPECT_TRUE(IsAsciiWordChar('A'));
 545   EXPECT_TRUE(IsAsciiWordChar('Z'));
 546 }
 547
 548 TEST(IsAsciiWordCharTest, IsTrueForDigit) {
 549   EXPECT_TRUE(IsAsciiWordChar('0'));
 550   EXPECT_TRUE(IsAsciiWordChar('1'));
 551   EXPECT_TRUE(IsAsciiWordChar('7'));
 552   EXPECT_TRUE(IsAsciiWordChar('9'));
 553 }
 554
 555 TEST(IsAsciiWordCharTest, IsTrueForUnderscore) {
 556   EXPECT_TRUE(IsAsciiWordChar('_'));
 557 }
 558
 559 TEST(IsValidEscapeTest, IsFalseForNonPrintable) {
 560   EXPECT_FALSE(IsValidEscape('\0'));
 561   EXPECT_FALSE(IsValidEscape('\007'));
 562 }
 563
 564 TEST(IsValidEscapeTest, IsFalseForDigit) {
 565   EXPECT_FALSE(IsValidEscape('0'));
 566   EXPECT_FALSE(IsValidEscape('9'));
 567 }
 568
 569 TEST(IsValidEscapeTest, IsFalseForWhiteSpace) {
 570   EXPECT_FALSE(IsValidEscape(' '));
 571   EXPECT_FALSE(IsValidEscape('\n'));
 572 }
 573
 574 TEST(IsValidEscapeTest, IsFalseForSomeLetter) {
 575   EXPECT_FALSE(IsValidEscape('a'));
 576   EXPECT_FALSE(IsValidEscape('Z'));
 577 }
 578
 579 TEST(IsValidEscapeTest, IsTrueForPunct) {
 580   EXPECT_TRUE(IsValidEscape('.'));
 581   EXPECT_TRUE(IsValidEscape('-'));
 582   EXPECT_TRUE(IsValidEscape('^'));
 583   EXPECT_TRUE(IsValidEscape('$'));
 584   EXPECT_TRUE(IsValidEscape('('));
 585   EXPECT_TRUE(IsValidEscape(']'));
 586   EXPECT_TRUE(IsValidEscape('{'));
 587   EXPECT_TRUE(IsValidEscape('|'));
 588 }
 589
 590 TEST(IsValidEscapeTest, IsTrueForSomeLetter) {
 591   EXPECT_TRUE(IsValidEscape('d'));
 592   EXPECT_TRUE(IsValidEscape('D'));
 593   EXPECT_TRUE(IsValidEscape('s'));
 594   EXPECT_TRUE(IsValidEscape('S'));
 595   EXPECT_TRUE(IsValidEscape('w'));
 596   EXPECT_TRUE(IsValidEscape('W'));
 597 }
 598
 599 TEST(AtomMatchesCharTest, EscapedPunct) {
 600   EXPECT_FALSE(AtomMatchesChar(true, '\\', '\0'));
 601   EXPECT_FALSE(AtomMatchesChar(true, '\\', ' '));
 602   EXPECT_FALSE(AtomMatchesChar(true, '_', '.'));
 603   EXPECT_FALSE(AtomMatchesChar(true, '.', 'a'));
 604
 605   EXPECT_TRUE(AtomMatchesChar(true, '\\', '\\'));
 606   EXPECT_TRUE(AtomMatchesChar(true, '_', '_'));
 607   EXPECT_TRUE(AtomMatchesChar(true, '+', '+'));
 608   EXPECT_TRUE(AtomMatchesChar(true, '.', '.'));
 609 }
 610
 611 TEST(AtomMatchesCharTest, Escaped_d) {
 612   EXPECT_FALSE(AtomMatchesChar(true, 'd', '\0'));
 613   EXPECT_FALSE(AtomMatchesChar(true, 'd', 'a'));
 614   EXPECT_FALSE(AtomMatchesChar(true, 'd', '.'));
 615
 616   EXPECT_TRUE(AtomMatchesChar(true, 'd', '0'));
 617   EXPECT_TRUE(AtomMatchesChar(true, 'd', '9'));
 618 }
 619
 620 TEST(AtomMatchesCharTest, Escaped_D) {
 621   EXPECT_FALSE(AtomMatchesChar(true, 'D', '0'));
 622   EXPECT_FALSE(AtomMatchesChar(true, 'D', '9'));
 623
 624   EXPECT_TRUE(AtomMatchesChar(true, 'D', '\0'));
 625   EXPECT_TRUE(AtomMatchesChar(true, 'D', 'a'));
 626   EXPECT_TRUE(AtomMatchesChar(true, 'D', '-'));
 627 }
 628
 629 TEST(AtomMatchesCharTest, Escaped_s) {
 630   EXPECT_FALSE(AtomMatchesChar(true, 's', '\0'));
 631   EXPECT_FALSE(AtomMatchesChar(true, 's', 'a'));
 632   EXPECT_FALSE(AtomMatchesChar(true, 's', '.'));
 633   EXPECT_FALSE(AtomMatchesChar(true, 's', '9'));
 634
 635   EXPECT_TRUE(AtomMatchesChar(true, 's', ' '));
 636   EXPECT_TRUE(AtomMatchesChar(true, 's', '\n'));
 637   EXPECT_TRUE(AtomMatchesChar(true, 's', '\t'));
 638 }
 639
 640 TEST(AtomMatchesCharTest, Escaped_S) {
 641   EXPECT_FALSE(AtomMatchesChar(true, 'S', ' '));
 642   EXPECT_FALSE(AtomMatchesChar(true, 'S', '\r'));
 643
 644   EXPECT_TRUE(AtomMatchesChar(true, 'S', '\0'));
 645   EXPECT_TRUE(AtomMatchesChar(true, 'S', 'a'));
 646   EXPECT_TRUE(AtomMatchesChar(true, 'S', '9'));
 647 }
 648
 649 TEST(AtomMatchesCharTest, Escaped_w) {
 650   EXPECT_FALSE(AtomMatchesChar(true, 'w', '\0'));
 651   EXPECT_FALSE(AtomMatchesChar(true, 'w', '+'));
 652   EXPECT_FALSE(AtomMatchesChar(true, 'w', ' '));
 653   EXPECT_FALSE(AtomMatchesChar(true, 'w', '\n'));
 654
 655   EXPECT_TRUE(AtomMatchesChar(true, 'w', '0'));
 656   EXPECT_TRUE(AtomMatchesChar(true, 'w', 'b'));
 657   EXPECT_TRUE(AtomMatchesChar(true, 'w', 'C'));
 658   EXPECT_TRUE(AtomMatchesChar(true, 'w', '_'));
 659 }
 660
 661 TEST(AtomMatchesCharTest, Escaped_W) {
 662   EXPECT_FALSE(AtomMatchesChar(true, 'W', 'A'));
 663   EXPECT_FALSE(AtomMatchesChar(true, 'W', 'b'));
 664   EXPECT_FALSE(AtomMatchesChar(true, 'W', '9'));
 665   EXPECT_FALSE(AtomMatchesChar(true, 'W', '_'));
 666
 667   EXPECT_TRUE(AtomMatchesChar(true, 'W', '\0'));
 668   EXPECT_TRUE(AtomMatchesChar(true, 'W', '*'));
 669   EXPECT_TRUE(AtomMatchesChar(true, 'W', '\n'));
 670 }
 671
 672 TEST(AtomMatchesCharTest, EscapedWhiteSpace) {
 673   EXPECT_FALSE(AtomMatchesChar(true, 'f', '\0'));
 674   EXPECT_FALSE(AtomMatchesChar(true, 'f', '\n'));
 675   EXPECT_FALSE(AtomMatchesChar(true, 'n', '\0'));
 676   EXPECT_FALSE(AtomMatchesChar(true, 'n', '\r'));
 677   EXPECT_FALSE(AtomMatchesChar(true, 'r', '\0'));
 678   EXPECT_FALSE(AtomMatchesChar(true, 'r', 'a'));
 679   EXPECT_FALSE(AtomMatchesChar(true, 't', '\0'));
 680   EXPECT_FALSE(AtomMatchesChar(true, 't', 't'));
 681   EXPECT_FALSE(AtomMatchesChar(true, 'v', '\0'));
 682   EXPECT_FALSE(AtomMatchesChar(true, 'v', '\f'));
 683
 684   EXPECT_TRUE(AtomMatchesChar(true, 'f', '\f'));
 685   EXPECT_TRUE(AtomMatchesChar(true, 'n', '\n'));
 686   EXPECT_TRUE(AtomMatchesChar(true, 'r', '\r'));
 687   EXPECT_TRUE(AtomMatchesChar(true, 't', '\t'));
 688   EXPECT_TRUE(AtomMatchesChar(true, 'v', '\v'));
 689 }
 690
 691 TEST(AtomMatchesCharTest, UnescapedDot) {
 692   EXPECT_FALSE(AtomMatchesChar(false, '.', '\n'));
 693
 694   EXPECT_TRUE(AtomMatchesChar(false, '.', '\0'));
 695   EXPECT_TRUE(AtomMatchesChar(false, '.', '.'));
 696   EXPECT_TRUE(AtomMatchesChar(false, '.', 'a'));
 697   EXPECT_TRUE(AtomMatchesChar(false, '.', ' '));
 698 }
 699
 700 TEST(AtomMatchesCharTest, UnescapedChar) {
 701   EXPECT_FALSE(AtomMatchesChar(false, 'a', '\0'));
 702   EXPECT_FALSE(AtomMatchesChar(false, 'a', 'b'));
 703   EXPECT_FALSE(AtomMatchesChar(false, '$', 'a'));
 704
 705   EXPECT_TRUE(AtomMatchesChar(false, '$', '$'));
 706   EXPECT_TRUE(AtomMatchesChar(false, '5', '5'));
 707   EXPECT_TRUE(AtomMatchesChar(false, 'Z', 'Z'));
 708 }
 709
 710 TEST(ValidateRegexTest, GeneratesFailureAndReturnsFalseForInvalid) {
 711   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex(NULL)),
 712                           "NULL is not a valid simple regular expression");
 713   EXPECT_NONFATAL_FAILURE(
 714       ASSERT_FALSE(ValidateRegex("a\\")),
 715       "Syntax error at index 1 in simple regular expression \"a\\\": ");
 716   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a\\")),
 717                           "'\\' cannot appear at the end");
 718   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("\\n\\")),
 719                           "'\\' cannot appear at the end");
 720   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("\\s\\hb")),
 721                           "invalid escape sequence \"\\h\"");
 722   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^^")),
 723                           "'^' can only appear at the beginning");
 724   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex(".*^b")),
 725                           "'^' can only appear at the beginning");
 726   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("$$")),
 727                           "'$' can only appear at the end");
 728   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^$a")),
 729                           "'$' can only appear at the end");
 730   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a(b")),
 731                           "'(' is unsupported");
 732   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("ab)")),
 733                           "')' is unsupported");
 734   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("[ab")),
 735                           "'[' is unsupported");
 736   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("a{2")),
 737                           "'{' is unsupported");
 738   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("?")),
 739                           "'?' can only follow a repeatable token");
 740   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("^*")),
 741                           "'*' can only follow a repeatable token");
 742   EXPECT_NONFATAL_FAILURE(ASSERT_FALSE(ValidateRegex("5*+")),
 743                           "'+' can only follow a repeatable token");
 744 }
 745
 746 TEST(ValidateRegexTest, ReturnsTrueForValid) {
 747   EXPECT_TRUE(ValidateRegex(""));
 748   EXPECT_TRUE(ValidateRegex("a"));
 749   EXPECT_TRUE(ValidateRegex(".*"));
 750   EXPECT_TRUE(ValidateRegex("^a_+"));
 751   EXPECT_TRUE(ValidateRegex("^a\\t\\&?"));
 752   EXPECT_TRUE(ValidateRegex("09*$"));
 753   EXPECT_TRUE(ValidateRegex("^Z$"));
 754   EXPECT_TRUE(ValidateRegex("a\\^Z\\$\\(\\)\\|\\[\\]\\{\\}"));
 755 }
 756
 757 TEST(MatchRepetitionAndRegexAtHeadTest, WorksForZeroOrOne) {
 758   EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "a", "ba"));
 759   // Repeating more than once.
 760   EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "aab"));
 761
 762   // Repeating zero times.
 763   EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "ba"));
 764   // Repeating once.
 765   EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, 'a', '?', "b", "ab"));
 766   EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '#', '?', ".", "##"));
 767 }
 768
 769 TEST(MatchRepetitionAndRegexAtHeadTest, WorksForZeroOrMany) {
 770   EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '*', "a$", "baab"));
 771
 772   // Repeating zero times.
 773   EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '*', "b", "bc"));
 774   // Repeating once.
 775   EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '*', "b", "abc"));
 776   // Repeating more than once.
 777   EXPECT_TRUE(MatchRepetitionAndRegexAtHead(true, 'w', '*', "-", "ab_1-g"));
 778 }
 779
 780 TEST(MatchRepetitionAndRegexAtHeadTest, WorksForOneOrMany) {
 781   EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '+', "a$", "baab"));
 782   // Repeating zero times.
 783   EXPECT_FALSE(MatchRepetitionAndRegexAtHead(false, '.', '+', "b", "bc"));
 784
 785   // Repeating once.
 786   EXPECT_TRUE(MatchRepetitionAndRegexAtHead(false, '.', '+', "b", "abc"));
 787   // Repeating more than once.
 788   EXPECT_TRUE(MatchRepetitionAndRegexAtHead(true, 'w', '+', "-", "ab_1-g"));
 789 }
 790
 791 TEST(MatchRegexAtHeadTest, ReturnsTrueForEmptyRegex) {
 792   EXPECT_TRUE(MatchRegexAtHead("", ""));
 793   EXPECT_TRUE(MatchRegexAtHead("", "ab"));
 794 }
 795
 796 TEST(MatchRegexAtHeadTest, WorksWhenDollarIsInRegex) {
 797   EXPECT_FALSE(MatchRegexAtHead("$", "a"));
 798
 799   EXPECT_TRUE(MatchRegexAtHead("$", ""));
 800   EXPECT_TRUE(MatchRegexAtHead("a$", "a"));
 801 }
 802
 803 TEST(MatchRegexAtHeadTest, WorksWhenRegexStartsWithEscapeSequence) {
 804   EXPECT_FALSE(MatchRegexAtHead("\\w", "+"));
 805   EXPECT_FALSE(MatchRegexAtHead("\\W", "ab"));
 806
 807   EXPECT_TRUE(MatchRegexAtHead("\\sa", "\nab"));
 808   EXPECT_TRUE(MatchRegexAtHead("\\d", "1a"));
 809 }
 810
 811 TEST(MatchRegexAtHeadTest, WorksWhenRegexStartsWithRepetition) {
 812   EXPECT_FALSE(MatchRegexAtHead(".+a", "abc"));
 813   EXPECT_FALSE(MatchRegexAtHead("a?b", "aab"));
 814
 815   EXPECT_TRUE(MatchRegexAtHead(".*a", "bc12-ab"));
 816   EXPECT_TRUE(MatchRegexAtHead("a?b", "b"));
 817   EXPECT_TRUE(MatchRegexAtHead("a?b", "ab"));
 818 }
 819
 820 TEST(MatchRegexAtHeadTest,
 821      WorksWhenRegexStartsWithRepetionOfEscapeSequence) {
 822   EXPECT_FALSE(MatchRegexAtHead("\\.+a", "abc"));
 823   EXPECT_FALSE(MatchRegexAtHead("\\s?b", "  b"));
 824
 825   EXPECT_TRUE(MatchRegexAtHead("\\(*a", "((((ab"));
 826   EXPECT_TRUE(MatchRegexAtHead("\\^?b", "^b"));
 827   EXPECT_TRUE(MatchRegexAtHead("\\\\?b", "b"));
 828   EXPECT_TRUE(MatchRegexAtHead("\\\\?b", "\\b"));
 829 }
 830
 831 TEST(MatchRegexAtHeadTest, MatchesSequentially) {
 832   EXPECT_FALSE(MatchRegexAtHead("ab.*c", "acabc"));
 833
 834   EXPECT_TRUE(MatchRegexAtHead("ab.*c", "ab-fsc"));
 835 }
 836
 837 TEST(MatchRegexAnywhereTest, ReturnsFalseWhenStringIsNull) {
 838   EXPECT_FALSE(MatchRegexAnywhere("", NULL));
 839 }
 840
 841 TEST(MatchRegexAnywhereTest, WorksWhenRegexStartsWithCaret) {
 842   EXPECT_FALSE(MatchRegexAnywhere("^a", "ba"));
 843   EXPECT_FALSE(MatchRegexAnywhere("^$", "a"));
 844
 845   EXPECT_TRUE(MatchRegexAnywhere("^a", "ab"));
 846   EXPECT_TRUE(MatchRegexAnywhere("^", "ab"));
 847   EXPECT_TRUE(MatchRegexAnywhere("^$", ""));
 848 }
 849
 850 TEST(MatchRegexAnywhereTest, ReturnsFalseWhenNoMatch) {
 851   EXPECT_FALSE(MatchRegexAnywhere("a", "bcde123"));
 852   EXPECT_FALSE(MatchRegexAnywhere("a.+a", "--aa88888888"));
 853 }
 854
 855 TEST(MatchRegexAnywhereTest, ReturnsTrueWhenMatchingPrefix) {
 856   EXPECT_TRUE(MatchRegexAnywhere("\\w+", "ab1_ - 5"));
 857   EXPECT_TRUE(MatchRegexAnywhere(".*=", "="));
 858   EXPECT_TRUE(MatchRegexAnywhere("x.*ab?.*bc", "xaaabc"));
 859 }
 860
 861 TEST(MatchRegexAnywhereTest, ReturnsTrueWhenMatchingNonPrefix) {
 862   EXPECT_TRUE(MatchRegexAnywhere("\\w+", "$$$ ab1_ - 5"));
 863   EXPECT_TRUE(MatchRegexAnywhere("\\.+=", "=  ...="));
 864 }
 865
 866 // Tests RE's implicit constructors.
 867 TEST(RETest, ImplicitConstructorWorks) {
 868   const RE empty("");
 869   EXPECT_STREQ("", empty.pattern());
 870
 871   const RE simple("hello");
 872   EXPECT_STREQ("hello", simple.pattern());
 873 }
 874
 875 // Tests that RE's constructors reject invalid regular expressions.
 876 TEST(RETest, RejectsInvalidRegex) {
 877   EXPECT_NONFATAL_FAILURE({
 878     const RE normal(NULL);
 879   }, "NULL is not a valid simple regular expression");
 880
 881   EXPECT_NONFATAL_FAILURE({
 882     const RE normal(".*(\\w+");
 883   }, "'(' is unsupported");
 884
 885   EXPECT_NONFATAL_FAILURE({
 886     const RE invalid("^?");
 887   }, "'?' can only follow a repeatable token");
 888 }
 889
 890 // Tests RE::FullMatch().
 891 TEST(RETest, FullMatchWorks) {
 892   const RE empty("");
 893   EXPECT_TRUE(RE::FullMatch("", empty));
 894   EXPECT_FALSE(RE::FullMatch("a", empty));
 895
 896   const RE re1("a");
 897   EXPECT_TRUE(RE::FullMatch("a", re1));
 898
 899   const RE re("a.*z");
 900   EXPECT_TRUE(RE::FullMatch("az", re));
 901   EXPECT_TRUE(RE::FullMatch("axyz", re));
 902   EXPECT_FALSE(RE::FullMatch("baz", re));
 903   EXPECT_FALSE(RE::FullMatch("azy", re));
 904 }
 905
 906 // Tests RE::PartialMatch().
 907 TEST(RETest, PartialMatchWorks) {
 908   const RE empty("");
 909   EXPECT_TRUE(RE::PartialMatch("", empty));
 910   EXPECT_TRUE(RE::PartialMatch("a", empty));
 911
 912   const RE re("a.*z");
 913   EXPECT_TRUE(RE::PartialMatch("az", re));
 914   EXPECT_TRUE(RE::PartialMatch("axyz", re));
 915   EXPECT_TRUE(RE::PartialMatch("baz", re));
 916   EXPECT_TRUE(RE::PartialMatch("azy", re));
 917   EXPECT_FALSE(RE::PartialMatch("zza", re));
 918 }
 919
 920 #endif  // GTEST_USES_POSIX_RE
 921
 922 #if !GTEST_OS_WINDOWS_MOBILE
 923
 924 TEST(CaptureTest, CapturesStdout) {
 925   CaptureStdout();
 926   fprintf(stdout, "abc");
 927   EXPECT_STREQ("abc", GetCapturedStdout().c_str());
 928
 929   CaptureStdout();
 930   fprintf(stdout, "def%cghi", '\0');
 931   EXPECT_EQ(::std::string("def\0ghi", 7), ::std::string(GetCapturedStdout()));
 932 }
 933
 934 TEST(CaptureTest, CapturesStderr) {
 935   CaptureStderr();
 936   fprintf(stderr, "jkl");
 937   EXPECT_STREQ("jkl", GetCapturedStderr().c_str());
 938
 939   CaptureStderr();
 940   fprintf(stderr, "jkl%cmno", '\0');
 941   EXPECT_EQ(::std::string("jkl\0mno", 7), ::std::string(GetCapturedStderr()));
 942 }
 943
 944 // Tests that stdout and stderr capture don't interfere with each other.
 945 TEST(CaptureTest, CapturesStdoutAndStderr) {
 946   CaptureStdout();
 947   CaptureStderr();
 948   fprintf(stdout, "pqr");
 949   fprintf(stderr, "stu");
 950   EXPECT_STREQ("pqr", GetCapturedStdout().c_str());
 951   EXPECT_STREQ("stu", GetCapturedStderr().c_str());
 952 }
 953
 954 TEST(CaptureDeathTest, CannotReenterStdoutCapture) {
 955   CaptureStdout();
 956   EXPECT_DEATH_IF_SUPPORTED(CaptureStdout(),
 957                             "Only one stdout capturer can exist at a time");
 958   GetCapturedStdout();
 959
 960   // We cannot test stderr capturing using death tests as they use it
 961   // themselves.
 962 }
 963
 964 #endif  // !GTEST_OS_WINDOWS_MOBILE
 965
 966 TEST(ThreadLocalTest, DefaultConstructorInitializesToDefaultValues) {
 967   ThreadLocal<int> t1;
 968   EXPECT_EQ(0, t1.get());
 969
 970   ThreadLocal<void*> t2;
 971   EXPECT_TRUE(t2.get() == nullptr);
 972 }
 973
 974 TEST(ThreadLocalTest, SingleParamConstructorInitializesToParam) {
 975   ThreadLocal<int> t1(123);
 976   EXPECT_EQ(123, t1.get());
 977
 978   int i = 0;
 979   ThreadLocal<int*> t2(&i);
 980   EXPECT_EQ(&i, t2.get());
 981 }
 982
 983 class NoDefaultContructor {
 984  public:
 985   explicit NoDefaultContructor(const char*) {}
 986   NoDefaultContructor(const NoDefaultContructor&) {}
 987 };
 988
 989 TEST(ThreadLocalTest, ValueDefaultContructorIsNotRequiredForParamVersion) {
 990   ThreadLocal<NoDefaultContructor> bar(NoDefaultContructor("foo"));
 991   bar.pointer();
 992 }
 993
 994 TEST(ThreadLocalTest, GetAndPointerReturnSameValue) {
 995   ThreadLocal<std::string> thread_local_string;
 996
 997   EXPECT_EQ(thread_local_string.pointer(), &(thread_local_string.get()));
 998
 999   // Verifies the condition still holds after calling set.
1000   thread_local_string.set("foo");
1001   EXPECT_EQ(thread_local_string.pointer(), &(thread_local_string.get()));
1002 }
1003
1004 TEST(ThreadLocalTest, PointerAndConstPointerReturnSameValue) {
1005   ThreadLocal<std::string> thread_local_string;
1006   const ThreadLocal<std::string>& const_thread_local_string =
1007       thread_local_string;
1008
1009   EXPECT_EQ(thread_local_string.pointer(), const_thread_local_string.pointer());
1010
1011   thread_local_string.set("foo");
1012   EXPECT_EQ(thread_local_string.pointer(), const_thread_local_string.pointer());
1013 }
1014
1015 #if GTEST_IS_THREADSAFE
1016
1017 void AddTwo(int* param) { *param += 2; }
1018
1019 TEST(ThreadWithParamTest, ConstructorExecutesThreadFunc) {
1020   int i = 40;
1021   ThreadWithParam<int*> thread(&AddTwo, &i, nullptr);
1022   thread.Join();
1023   EXPECT_EQ(42, i);
1024 }
1025
1026 TEST(MutexDeathTest, AssertHeldShouldAssertWhenNotLocked) {
1027   // AssertHeld() is flaky only in the presence of multiple threads accessing
1028   // the lock. In this case, the test is robust.
1029   EXPECT_DEATH_IF_SUPPORTED({
1030     Mutex m;
1031     { MutexLock lock(&m); }
1032     m.AssertHeld();
1033   },
1034   "thread .*hold");
1035 }
1036
1037 TEST(MutexTest, AssertHeldShouldNotAssertWhenLocked) {
1038   Mutex m;
1039   MutexLock lock(&m);
1040   m.AssertHeld();
1041 }
1042
1043 class AtomicCounterWithMutex {
1044  public:
1045   explicit AtomicCounterWithMutex(Mutex* mutex) :
1046     value_(0), mutex_(mutex), random_(42) {}
1047
1048   void Increment() {
1049     MutexLock lock(mutex_);
1050     int temp = value_;
1051     {
1052       // We need to put up a memory barrier to prevent reads and writes to
1053       // value_ rearranged with the call to SleepMilliseconds when observed
1054       // from other threads.
1055 #if GTEST_HAS_PTHREAD
1056       // On POSIX, locking a mutex puts up a memory barrier.  We cannot use
1057       // Mutex and MutexLock here or rely on their memory barrier
1058       // functionality as we are testing them here.
1059       pthread_mutex_t memory_barrier_mutex;
1060       GTEST_CHECK_POSIX_SUCCESS_(
1061           pthread_mutex_init(&memory_barrier_mutex, nullptr));
1062       GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_lock(&memory_barrier_mutex));
1063
1064       SleepMilliseconds(static_cast<int>(random_.Generate(30)));
1065
1066       GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_unlock(&memory_barrier_mutex));
1067       GTEST_CHECK_POSIX_SUCCESS_(pthread_mutex_destroy(&memory_barrier_mutex));
1068 #elif GTEST_OS_WINDOWS
1069       // On Windows, performing an interlocked access puts up a memory barrier.
1070       volatile LONG dummy = 0;
1071       ::InterlockedIncrement(&dummy);
1072       SleepMilliseconds(static_cast<int>(random_.Generate(30)));
1073       ::InterlockedIncrement(&dummy);
1074 #else
1075 # error "Memory barrier not implemented on this platform."
1076 #endif  // GTEST_HAS_PTHREAD
1077     }
1078     value_ = temp + 1;
1079   }
1080   int value() const { return value_; }
1081
1082  private:
1083   volatile int value_;
1084   Mutex* const mutex_;  // Protects value_.
1085   Random       random_;
1086 };
1087
1088 void CountingThreadFunc(pair<AtomicCounterWithMutex*, int> param) {
1089   for (int i = 0; i < param.second; ++i)
1090       param.first->Increment();
1091 }
1092
1093 // Tests that the mutex only lets one thread at a time to lock it.
1094 TEST(MutexTest, OnlyOneThreadCanLockAtATime) {
1095   Mutex mutex;
1096   AtomicCounterWithMutex locked_counter(&mutex);
1097
1098   typedef ThreadWithParam<pair<AtomicCounterWithMutex*, int> > ThreadType;
1099   const int kCycleCount = 20;
1100   const int kThreadCount = 7;
1101   std::unique_ptr<ThreadType> counting_threads[kThreadCount];
1102   Notification threads_can_start;
1103   // Creates and runs kThreadCount threads that increment locked_counter
1104   // kCycleCount times each.
1105   for (int i = 0; i < kThreadCount; ++i) {
1106     counting_threads[i].reset(new ThreadType(&CountingThreadFunc,
1107                                              make_pair(&locked_counter,
1108                                                        kCycleCount),
1109                                              &threads_can_start));
1110   }
1111   threads_can_start.Notify();
1112   for (int i = 0; i < kThreadCount; ++i)
1113     counting_threads[i]->Join();
1114
1115   // If the mutex lets more than one thread to increment the counter at a
1116   // time, they are likely to encounter a race condition and have some
1117   // increments overwritten, resulting in the lower then expected counter
1118   // value.
1119   EXPECT_EQ(kCycleCount * kThreadCount, locked_counter.value());
1120 }
1121
1122 template <typename T>
1123 void RunFromThread(void (func)(T), T param) {
1124   ThreadWithParam<T> thread(func, param, nullptr);
1125   thread.Join();
1126 }
1127
1128 void RetrieveThreadLocalValue(
1129     pair<ThreadLocal<std::string>*, std::string*> param) {
1130   *param.second = param.first->get();
1131 }
1132
1133 TEST(ThreadLocalTest, ParameterizedConstructorSetsDefault) {
1134   ThreadLocal<std::string> thread_local_string("foo");
1135   EXPECT_STREQ("foo", thread_local_string.get().c_str());
1136
1137   thread_local_string.set("bar");
1138   EXPECT_STREQ("bar", thread_local_string.get().c_str());
1139
1140   std::string result;
1141   RunFromThread(&RetrieveThreadLocalValue,
1142                 make_pair(&thread_local_string, &result));
1143   EXPECT_STREQ("foo", result.c_str());
1144 }
1145
1146 // Keeps track of whether of destructors being called on instances of
1147 // DestructorTracker.  On Windows, waits for the destructor call reports.
1148 class DestructorCall {
1149  public:
1150   DestructorCall() {
1151     invoked_ = false;
1152 #if GTEST_OS_WINDOWS
1153     wait_event_.Reset(::CreateEvent(NULL, TRUE, FALSE, NULL));
1154     GTEST_CHECK_(wait_event_.Get() != NULL);
1155 #endif
1156   }
1157
1158   bool CheckDestroyed() const {
1159 #if GTEST_OS_WINDOWS
1160     if (::WaitForSingleObject(wait_event_.Get(), 1000) != WAIT_OBJECT_0)
1161       return false;
1162 #endif
1163     return invoked_;
1164   }
1165
1166   void ReportDestroyed() {
1167     invoked_ = true;
1168 #if GTEST_OS_WINDOWS
1169     ::SetEvent(wait_event_.Get());
1170 #endif
1171   }
1172
1173   static std::vector<DestructorCall*>& List() { return *list_; }
1174
1175   static void ResetList() {
1176     for (size_t i = 0; i < list_->size(); ++i) {
1177       delete list_->at(i);
1178     }
1179     list_->clear();
1180   }
1181
1182  private:
1183   bool invoked_;
1184 #if GTEST_OS_WINDOWS
1185   AutoHandle wait_event_;
1186 #endif
1187   static std::vector<DestructorCall*>* const list_;
1188
1189   GTEST_DISALLOW_COPY_AND_ASSIGN_(DestructorCall);
1190 };
1191
1192 std::vector<DestructorCall*>* const DestructorCall::list_ =
1193     new std::vector<DestructorCall*>;
1194
1195 // DestructorTracker keeps track of whether its instances have been
1196 // destroyed.
1197 class DestructorTracker {
1198  public:
1199   DestructorTracker() : index_(GetNewIndex()) {}
1200   DestructorTracker(const DestructorTracker& /* rhs */)
1201       : index_(GetNewIndex()) {}
1202   ~DestructorTracker() {
1203     // We never access DestructorCall::List() concurrently, so we don't need
1204     // to protect this access with a mutex.
1205     DestructorCall::List()[index_]->ReportDestroyed();
1206   }
1207
1208  private:
1209   static size_t GetNewIndex() {
1210     DestructorCall::List().push_back(new DestructorCall);
1211     return DestructorCall::List().size() - 1;
1212   }
1213   const size_t index_;
1214 };
1215
1216 typedef ThreadLocal<DestructorTracker>* ThreadParam;
1217
1218 void CallThreadLocalGet(ThreadParam thread_local_param) {
1219   thread_local_param->get();
1220 }
1221
1222 // Tests that when a ThreadLocal object dies in a thread, it destroys
1223 // the managed object for that thread.
1224 TEST(ThreadLocalTest, DestroysManagedObjectForOwnThreadWhenDying) {
1225   DestructorCall::ResetList();
1226
1227   {
1228     ThreadLocal<DestructorTracker> thread_local_tracker;
1229     ASSERT_EQ(0U, DestructorCall::List().size());
1230
1231     // This creates another DestructorTracker object for the main thread.
1232     thread_local_tracker.get();
1233     ASSERT_EQ(1U, DestructorCall::List().size());
1234     ASSERT_FALSE(DestructorCall::List()[0]->CheckDestroyed());
1235   }
1236
1237   // Now thread_local_tracker has died.
1238   ASSERT_EQ(1U, DestructorCall::List().size());
1239   EXPECT_TRUE(DestructorCall::List()[0]->CheckDestroyed());
1240
1241   DestructorCall::ResetList();
1242 }
1243
1244 // Tests that when a thread exits, the thread-local object for that
1245 // thread is destroyed.
1246 TEST(ThreadLocalTest, DestroysManagedObjectAtThreadExit) {
1247   DestructorCall::ResetList();
1248
1249   {
1250     ThreadLocal<DestructorTracker> thread_local_tracker;
1251     ASSERT_EQ(0U, DestructorCall::List().size());
1252
1253     // This creates another DestructorTracker object in the new thread.
1254     ThreadWithParam<ThreadParam> thread(&CallThreadLocalGet,
1255                                         &thread_local_tracker, nullptr);
1256     thread.Join();
1257
1258     // The thread has exited, and we should have a DestroyedTracker
1259     // instance created for it. But it may not have been destroyed yet.
1260     ASSERT_EQ(1U, DestructorCall::List().size());
1261   }
1262
1263   // The thread has exited and thread_local_tracker has died.
1264   ASSERT_EQ(1U, DestructorCall::List().size());
1265   EXPECT_TRUE(DestructorCall::List()[0]->CheckDestroyed());
1266
1267   DestructorCall::ResetList();
1268 }
1269
1270 TEST(ThreadLocalTest, ThreadLocalMutationsAffectOnlyCurrentThread) {
1271   ThreadLocal<std::string> thread_local_string;
1272   thread_local_string.set("Foo");
1273   EXPECT_STREQ("Foo", thread_local_string.get().c_str());
1274
1275   std::string result;
1276   RunFromThread(&RetrieveThreadLocalValue,
1277                 make_pair(&thread_local_string, &result));
1278   EXPECT_TRUE(result.empty());
1279 }
1280
1281 #endif  // GTEST_IS_THREADSAFE
1282
1283 #if GTEST_OS_WINDOWS
1284 TEST(WindowsTypesTest, HANDLEIsVoidStar) {
1285   StaticAssertTypeEq<HANDLE, void*>();
1286 }
1287
1288 #if GTEST_OS_WINDOWS_MINGW && !defined(__MINGW64_VERSION_MAJOR)
1289 TEST(WindowsTypesTest, _CRITICAL_SECTIONIs_CRITICAL_SECTION) {
1290   StaticAssertTypeEq<CRITICAL_SECTION, _CRITICAL_SECTION>();
1291 }
1292 #else
1293 TEST(WindowsTypesTest, CRITICAL_SECTIONIs_RTL_CRITICAL_SECTION) {
1294   StaticAssertTypeEq<CRITICAL_SECTION, _RTL_CRITICAL_SECTION>();
1295 }
1296 #endif
1297
1298 #endif  // GTEST_OS_WINDOWS
1299
1300 }  // namespace internal
1301 }  // namespace testing