unittests/Support/Path.cpp

   1 //===- llvm/unittest/Support/Path.cpp - Path tests ------------------------===//
   2 //
   3 //                     The LLVM Compiler Infrastructure
   4 //
   5 // This file is distributed under the University of Illinois Open Source
   6 // License. See LICENSE.TXT for details.
   7 //
   8 //===----------------------------------------------------------------------===//
   9
  10 #include "llvm/Support/Path.h"
  11 #include "llvm/Support/Errc.h"
  12 #include "llvm/Support/ErrorHandling.h"
  13 #include "llvm/Support/FileSystem.h"
  14 #include "llvm/Support/MemoryBuffer.h"
  15 #include "llvm/Support/raw_ostream.h"
  16 #include "gtest/gtest.h"
  17
  18 #ifdef LLVM_ON_WIN32
  19 #include <windows.h>
  20 #include <winerror.h>
  21 #endif
  22
  23 #ifdef LLVM_ON_UNIX
  24 #include <sys/stat.h>
  25 #endif
  26
  27 using namespace llvm;
  28 using namespace llvm::sys;
  29
  30 #define ASSERT_NO_ERROR(x)                                                     \
  31   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
  32     SmallString<128> MessageStorage;                                           \
  33     raw_svector_ostream Message(MessageStorage);                               \
  34     Message << #x ": did not return errc::success.\n"                          \
  35             << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"          \
  36             << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";      \
  37     GTEST_FATAL_FAILURE_(MessageStorage.c_str());                              \
  38   } else {                                                                     \
  39   }
  40
  41 namespace {
  42
  43 TEST(is_separator, Works) {
  44   EXPECT_TRUE(path::is_separator('/'));
  45   EXPECT_FALSE(path::is_separator('\0'));
  46   EXPECT_FALSE(path::is_separator('-'));
  47   EXPECT_FALSE(path::is_separator(' '));
  48
  49 #ifdef LLVM_ON_WIN32
  50   EXPECT_TRUE(path::is_separator('\\'));
  51 #else
  52   EXPECT_FALSE(path::is_separator('\\'));
  53 #endif
  54 }
  55
  56 TEST(Support, Path) {
  57   SmallVector<StringRef, 40> paths;
  58   paths.push_back("");
  59   paths.push_back(".");
  60   paths.push_back("..");
  61   paths.push_back("foo");
  62   paths.push_back("/");
  63   paths.push_back("/foo");
  64   paths.push_back("foo/");
  65   paths.push_back("/foo/");
  66   paths.push_back("foo/bar");
  67   paths.push_back("/foo/bar");
  68   paths.push_back("//net");
  69   paths.push_back("//net/foo");
  70   paths.push_back("///foo///");
  71   paths.push_back("///foo///bar");
  72   paths.push_back("/.");
  73   paths.push_back("./");
  74   paths.push_back("/..");
  75   paths.push_back("../");
  76   paths.push_back("foo/.");
  77   paths.push_back("foo/..");
  78   paths.push_back("foo/./");
  79   paths.push_back("foo/./bar");
  80   paths.push_back("foo/..");
  81   paths.push_back("foo/../");
  82   paths.push_back("foo/../bar");
  83   paths.push_back("c:");
  84   paths.push_back("c:/");
  85   paths.push_back("c:foo");
  86   paths.push_back("c:/foo");
  87   paths.push_back("c:foo/");
  88   paths.push_back("c:/foo/");
  89   paths.push_back("c:/foo/bar");
  90   paths.push_back("prn:");
  91   paths.push_back("c:\\");
  92   paths.push_back("c:foo");
  93   paths.push_back("c:\\foo");
  94   paths.push_back("c:foo\\");
  95   paths.push_back("c:\\foo\\");
  96   paths.push_back("c:\\foo/");
  97   paths.push_back("c:/foo\\bar");
  98
  99   SmallVector<StringRef, 5> ComponentStack;
 100   for (SmallVector<StringRef, 40>::const_iterator i = paths.begin(),
 101                                                   e = paths.end();
 102                                                   i != e;
 103                                                   ++i) {
 104     for (sys::path::const_iterator ci = sys::path::begin(*i),
 105                                    ce = sys::path::end(*i);
 106                                    ci != ce;
 107                                    ++ci) {
 108       ASSERT_FALSE(ci->empty());
 109       ComponentStack.push_back(*ci);
 110     }
 111
 112     for (sys::path::reverse_iterator ci = sys::path::rbegin(*i),
 113                                      ce = sys::path::rend(*i);
 114                                      ci != ce;
 115                                      ++ci) {
 116       ASSERT_TRUE(*ci == ComponentStack.back());
 117       ComponentStack.pop_back();
 118     }
 119     ASSERT_TRUE(ComponentStack.empty());
 120
 121     path::has_root_path(*i);
 122     path::root_path(*i);
 123     path::has_root_name(*i);
 124     path::root_name(*i);
 125     path::has_root_directory(*i);
 126     path::root_directory(*i);
 127     path::has_parent_path(*i);
 128     path::parent_path(*i);
 129     path::has_filename(*i);
 130     path::filename(*i);
 131     path::has_stem(*i);
 132     path::stem(*i);
 133     path::has_extension(*i);
 134     path::extension(*i);
 135     path::is_absolute(*i);
 136     path::is_relative(*i);
 137
 138     SmallString<128> temp_store;
 139     temp_store = *i;
 140     ASSERT_NO_ERROR(fs::make_absolute(temp_store));
 141     temp_store = *i;
 142     path::remove_filename(temp_store);
 143
 144     temp_store = *i;
 145     path::replace_extension(temp_store, "ext");
 146     StringRef filename(temp_store.begin(), temp_store.size()), stem, ext;
 147     stem = path::stem(filename);
 148     ext  = path::extension(filename);
 149     EXPECT_EQ(*sys::path::rbegin(filename), (stem + ext).str());
 150
 151     path::native(*i, temp_store);
 152   }
 153
 154   SmallString<32> Relative("foo.cpp");
 155   ASSERT_NO_ERROR(sys::fs::make_absolute("/root", Relative));
 156   Relative[5] = '/'; // Fix up windows paths.
 157   ASSERT_EQ("/root/foo.cpp", Relative);
 158 }
 159
 160 TEST(Support, RelativePathIterator) {
 161   SmallString<64> Path(StringRef("c/d/e/foo.txt"));
 162   typedef SmallVector<StringRef, 4> PathComponents;
 163   PathComponents ExpectedPathComponents;
 164   PathComponents ActualPathComponents;
 165
 166   StringRef(Path).split(ExpectedPathComponents, '/');
 167
 168   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 169        ++I) {
 170     ActualPathComponents.push_back(*I);
 171   }
 172
 173   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 174
 175   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 176     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 177   }
 178 }
 179
 180 TEST(Support, RelativePathDotIterator) {
 181   SmallString<64> Path(StringRef(".c/.d/../."));
 182   typedef SmallVector<StringRef, 4> PathComponents;
 183   PathComponents ExpectedPathComponents;
 184   PathComponents ActualPathComponents;
 185
 186   StringRef(Path).split(ExpectedPathComponents, '/');
 187
 188   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 189        ++I) {
 190     ActualPathComponents.push_back(*I);
 191   }
 192
 193   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 194
 195   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 196     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 197   }
 198 }
 199
 200 TEST(Support, AbsolutePathIterator) {
 201   SmallString<64> Path(StringRef("/c/d/e/foo.txt"));
 202   typedef SmallVector<StringRef, 4> PathComponents;
 203   PathComponents ExpectedPathComponents;
 204   PathComponents ActualPathComponents;
 205
 206   StringRef(Path).split(ExpectedPathComponents, '/');
 207
 208   // The root path will also be a component when iterating
 209   ExpectedPathComponents[0] = "/";
 210
 211   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 212        ++I) {
 213     ActualPathComponents.push_back(*I);
 214   }
 215
 216   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 217
 218   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 219     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 220   }
 221 }
 222
 223 TEST(Support, AbsolutePathDotIterator) {
 224   SmallString<64> Path(StringRef("/.c/.d/../."));
 225   typedef SmallVector<StringRef, 4> PathComponents;
 226   PathComponents ExpectedPathComponents;
 227   PathComponents ActualPathComponents;
 228
 229   StringRef(Path).split(ExpectedPathComponents, '/');
 230
 231   // The root path will also be a component when iterating
 232   ExpectedPathComponents[0] = "/";
 233
 234   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 235        ++I) {
 236     ActualPathComponents.push_back(*I);
 237   }
 238
 239   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 240
 241   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 242     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 243   }
 244 }
 245
 246 #ifdef LLVM_ON_WIN32
 247 TEST(Support, AbsolutePathIteratorWin32) {
 248   SmallString<64> Path(StringRef("c:\\c\\e\\foo.txt"));
 249   typedef SmallVector<StringRef, 4> PathComponents;
 250   PathComponents ExpectedPathComponents;
 251   PathComponents ActualPathComponents;
 252
 253   StringRef(Path).split(ExpectedPathComponents, "\\");
 254
 255   // The root path (which comes after the drive name) will also be a component
 256   // when iterating.
 257   ExpectedPathComponents.insert(ExpectedPathComponents.begin()+1, "\\");
 258
 259   for (path::const_iterator I = path::begin(Path), E = path::end(Path); I != E;
 260        ++I) {
 261     ActualPathComponents.push_back(*I);
 262   }
 263
 264   ASSERT_EQ(ExpectedPathComponents.size(), ActualPathComponents.size());
 265
 266   for (size_t i = 0; i <ExpectedPathComponents.size(); ++i) {
 267     EXPECT_EQ(ExpectedPathComponents[i].str(), ActualPathComponents[i].str());
 268   }
 269 }
 270 #endif // LLVM_ON_WIN32
 271
 272 TEST(Support, AbsolutePathIteratorEnd) {
 273   // Trailing slashes are converted to '.' unless they are part of the root path.
 274   SmallVector<StringRef, 4> Paths;
 275   Paths.push_back("/foo/");
 276   Paths.push_back("/foo//");
 277   Paths.push_back("//net//");
 278 #ifdef LLVM_ON_WIN32
 279   Paths.push_back("c:\\\\");
 280 #endif
 281
 282   for (StringRef Path : Paths) {
 283     StringRef LastComponent = *path::rbegin(Path);
 284     EXPECT_EQ(".", LastComponent);
 285   }
 286
 287   SmallVector<StringRef, 3> RootPaths;
 288   RootPaths.push_back("/");
 289   RootPaths.push_back("//net/");
 290 #ifdef LLVM_ON_WIN32
 291   RootPaths.push_back("c:\\");
 292 #endif
 293
 294   for (StringRef Path : RootPaths) {
 295     StringRef LastComponent = *path::rbegin(Path);
 296     EXPECT_EQ(1u, LastComponent.size());
 297     EXPECT_TRUE(path::is_separator(LastComponent[0]));
 298   }
 299 }
 300
 301 TEST(Support, HomeDirectory) {
 302 #ifdef LLVM_ON_UNIX
 303   // This test only makes sense on Unix if $HOME is set.
 304   if (::getenv("HOME")) {
 305 #endif
 306     SmallString<128> HomeDir;
 307     EXPECT_TRUE(path::home_directory(HomeDir));
 308     EXPECT_FALSE(HomeDir.empty());
 309 #ifdef LLVM_ON_UNIX
 310   }
 311 #endif
 312 }
 313
 314 class FileSystemTest : public testing::Test {
 315 protected:
 316   /// Unique temporary directory in which all created filesystem entities must
 317   /// be placed. It is removed at the end of each test (must be empty).
 318   SmallString<128> TestDirectory;
 319
 320   void SetUp() override {
 321     ASSERT_NO_ERROR(
 322         fs::createUniqueDirectory("file-system-test", TestDirectory));
 323     // We don't care about this specific file.
 324     errs() << "Test Directory: " << TestDirectory << '\n';
 325     errs().flush();
 326   }
 327
 328   void TearDown() override { ASSERT_NO_ERROR(fs::remove(TestDirectory.str())); }
 329 };
 330
 331 TEST_F(FileSystemTest, Unique) {
 332   // Create a temp file.
 333   int FileDescriptor;
 334   SmallString<64> TempPath;
 335   ASSERT_NO_ERROR(
 336       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
 337
 338   // The same file should return an identical unique id.
 339   fs::UniqueID F1, F2;
 340   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F1));
 341   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath), F2));
 342   ASSERT_EQ(F1, F2);
 343
 344   // Different files should return different unique ids.
 345   int FileDescriptor2;
 346   SmallString<64> TempPath2;
 347   ASSERT_NO_ERROR(
 348       fs::createTemporaryFile("prefix", "temp", FileDescriptor2, TempPath2));
 349
 350   fs::UniqueID D;
 351   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D));
 352   ASSERT_NE(D, F1);
 353   ::close(FileDescriptor2);
 354
 355   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 356
 357   // Two paths representing the same file on disk should still provide the
 358   // same unique id.  We can test this by making a hard link.
 359   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
 360   fs::UniqueID D2;
 361   ASSERT_NO_ERROR(fs::getUniqueID(Twine(TempPath2), D2));
 362   ASSERT_EQ(D2, F1);
 363
 364   ::close(FileDescriptor);
 365
 366   SmallString<128> Dir1;
 367   ASSERT_NO_ERROR(
 368      fs::createUniqueDirectory("dir1", Dir1));
 369   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F1));
 370   ASSERT_NO_ERROR(fs::getUniqueID(Dir1.c_str(), F2));
 371   ASSERT_EQ(F1, F2);
 372
 373   SmallString<128> Dir2;
 374   ASSERT_NO_ERROR(
 375      fs::createUniqueDirectory("dir2", Dir2));
 376   ASSERT_NO_ERROR(fs::getUniqueID(Dir2.c_str(), F2));
 377   ASSERT_NE(F1, F2);
 378 }
 379
 380 TEST_F(FileSystemTest, TempFiles) {
 381   // Create a temp file.
 382   int FileDescriptor;
 383   SmallString<64> TempPath;
 384   ASSERT_NO_ERROR(
 385       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
 386
 387   // Make sure it exists.
 388   ASSERT_TRUE(sys::fs::exists(Twine(TempPath)));
 389
 390   // Create another temp tile.
 391   int FD2;
 392   SmallString<64> TempPath2;
 393   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD2, TempPath2));
 394   ASSERT_TRUE(TempPath2.endswith(".temp"));
 395   ASSERT_NE(TempPath.str(), TempPath2.str());
 396
 397   fs::file_status A, B;
 398   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
 399   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
 400   EXPECT_FALSE(fs::equivalent(A, B));
 401
 402   ::close(FD2);
 403
 404   // Remove Temp2.
 405   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 406   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 407   ASSERT_EQ(fs::remove(Twine(TempPath2), false),
 408             errc::no_such_file_or_directory);
 409
 410   std::error_code EC = fs::status(TempPath2.c_str(), B);
 411   EXPECT_EQ(EC, errc::no_such_file_or_directory);
 412   EXPECT_EQ(B.type(), fs::file_type::file_not_found);
 413
 414   // Make sure Temp2 doesn't exist.
 415   ASSERT_EQ(fs::access(Twine(TempPath2), sys::fs::AccessMode::Exist),
 416             errc::no_such_file_or_directory);
 417
 418   SmallString<64> TempPath3;
 419   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "", TempPath3));
 420   ASSERT_FALSE(TempPath3.endswith("."));
 421
 422   // Create a hard link to Temp1.
 423   ASSERT_NO_ERROR(fs::create_link(Twine(TempPath), Twine(TempPath2)));
 424   bool equal;
 425   ASSERT_NO_ERROR(fs::equivalent(Twine(TempPath), Twine(TempPath2), equal));
 426   EXPECT_TRUE(equal);
 427   ASSERT_NO_ERROR(fs::status(Twine(TempPath), A));
 428   ASSERT_NO_ERROR(fs::status(Twine(TempPath2), B));
 429   EXPECT_TRUE(fs::equivalent(A, B));
 430
 431   // Remove Temp1.
 432   ::close(FileDescriptor);
 433   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
 434
 435   // Remove the hard link.
 436   ASSERT_NO_ERROR(fs::remove(Twine(TempPath2)));
 437
 438   // Make sure Temp1 doesn't exist.
 439   ASSERT_EQ(fs::access(Twine(TempPath), sys::fs::AccessMode::Exist),
 440             errc::no_such_file_or_directory);
 441
 442 #ifdef LLVM_ON_WIN32
 443   // Path name > 260 chars should get an error.
 444   const char *Path270 =
 445     "abcdefghijklmnopqrstuvwxyz9abcdefghijklmnopqrstuvwxyz8"
 446     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
 447     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
 448     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
 449     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
 450   EXPECT_EQ(fs::createUniqueFile(Path270, FileDescriptor, TempPath),
 451             errc::invalid_argument);
 452   // Relative path < 247 chars, no problem.
 453   const char *Path216 =
 454     "abcdefghijklmnopqrstuvwxyz7abcdefghijklmnopqrstuvwxyz6"
 455     "abcdefghijklmnopqrstuvwxyz5abcdefghijklmnopqrstuvwxyz4"
 456     "abcdefghijklmnopqrstuvwxyz3abcdefghijklmnopqrstuvwxyz2"
 457     "abcdefghijklmnopqrstuvwxyz1abcdefghijklmnopqrstuvwxyz0";
 458   ASSERT_NO_ERROR(fs::createTemporaryFile(Path216, "", TempPath));
 459   ASSERT_NO_ERROR(fs::remove(Twine(TempPath)));
 460 #endif
 461 }
 462
 463 TEST_F(FileSystemTest, CreateDir) {
 464   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
 465   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "foo"));
 466   ASSERT_EQ(fs::create_directory(Twine(TestDirectory) + "foo", false),
 467             errc::file_exists);
 468   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "foo"));
 469
 470 #ifdef LLVM_ON_UNIX
 471   // Set a 0000 umask so that we can test our directory permissions.
 472   mode_t OldUmask = ::umask(0000);
 473
 474   fs::file_status Status;
 475   ASSERT_NO_ERROR(
 476       fs::create_directory(Twine(TestDirectory) + "baz500", false,
 477                            fs::perms::owner_read | fs::perms::owner_exe));
 478   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz500", Status));
 479   ASSERT_EQ(Status.permissions() & fs::perms::all_all,
 480             fs::perms::owner_read | fs::perms::owner_exe);
 481   ASSERT_NO_ERROR(fs::create_directory(Twine(TestDirectory) + "baz777", false,
 482                                        fs::perms::all_all));
 483   ASSERT_NO_ERROR(fs::status(Twine(TestDirectory) + "baz777", Status));
 484   ASSERT_EQ(Status.permissions() & fs::perms::all_all, fs::perms::all_all);
 485
 486   // Restore umask to be safe.
 487   ::umask(OldUmask);
 488 #endif
 489
 490 #ifdef LLVM_ON_WIN32
 491   // Prove that create_directories() can handle a pathname > 248 characters,
 492   // which is the documented limit for CreateDirectory().
 493   // (248 is MAX_PATH subtracting room for an 8.3 filename.)
 494   // Generate a directory path guaranteed to fall into that range.
 495   size_t TmpLen = TestDirectory.size();
 496   const char *OneDir = "\\123456789";
 497   size_t OneDirLen = strlen(OneDir);
 498   ASSERT_LT(OneDirLen, 12U);
 499   size_t NLevels = ((248 - TmpLen) / OneDirLen) + 1;
 500   SmallString<260> LongDir(TestDirectory);
 501   for (size_t I = 0; I < NLevels; ++I)
 502     LongDir.append(OneDir);
 503   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
 504   ASSERT_NO_ERROR(fs::create_directories(Twine(LongDir)));
 505   ASSERT_EQ(fs::create_directories(Twine(LongDir), false),
 506             errc::file_exists);
 507   // Tidy up, "recursively" removing the directories.
 508   StringRef ThisDir(LongDir);
 509   for (size_t J = 0; J < NLevels; ++J) {
 510     ASSERT_NO_ERROR(fs::remove(ThisDir));
 511     ThisDir = path::parent_path(ThisDir);
 512   }
 513
 514   // Similarly for a relative pathname.  Need to set the current directory to
 515   // TestDirectory so that the one we create ends up in the right place.
 516   char PreviousDir[260];
 517   size_t PreviousDirLen = ::GetCurrentDirectoryA(260, PreviousDir);
 518   ASSERT_GT(PreviousDirLen, 0U);
 519   ASSERT_LT(PreviousDirLen, 260U);
 520   ASSERT_NE(::SetCurrentDirectoryA(TestDirectory.c_str()), 0);
 521   LongDir.clear();
 522   // Generate a relative directory name with absolute length > 248.
 523   size_t LongDirLen = 249 - TestDirectory.size();
 524   LongDir.assign(LongDirLen, 'a');
 525   ASSERT_NO_ERROR(fs::create_directory(Twine(LongDir)));
 526   // While we're here, prove that .. and . handling works in these long paths.
 527   const char *DotDotDirs = "\\..\\.\\b";
 528   LongDir.append(DotDotDirs);
 529   ASSERT_NO_ERROR(fs::create_directory("b"));
 530   ASSERT_EQ(fs::create_directory(Twine(LongDir), false), errc::file_exists);
 531   // And clean up.
 532   ASSERT_NO_ERROR(fs::remove("b"));
 533   ASSERT_NO_ERROR(fs::remove(
 534     Twine(LongDir.substr(0, LongDir.size() - strlen(DotDotDirs)))));
 535   ASSERT_NE(::SetCurrentDirectoryA(PreviousDir), 0);
 536 #endif
 537 }
 538
 539 TEST_F(FileSystemTest, DirectoryIteration) {
 540   std::error_code ec;
 541   for (fs::directory_iterator i(".", ec), e; i != e; i.increment(ec))
 542     ASSERT_NO_ERROR(ec);
 543
 544   // Create a known hierarchy to recurse over.
 545   ASSERT_NO_ERROR(
 546       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/aa1"));
 547   ASSERT_NO_ERROR(
 548       fs::create_directories(Twine(TestDirectory) + "/recursive/a0/ab1"));
 549   ASSERT_NO_ERROR(fs::create_directories(Twine(TestDirectory) +
 550                                          "/recursive/dontlookhere/da1"));
 551   ASSERT_NO_ERROR(
 552       fs::create_directories(Twine(TestDirectory) + "/recursive/z0/za1"));
 553   ASSERT_NO_ERROR(
 554       fs::create_directories(Twine(TestDirectory) + "/recursive/pop/p1"));
 555   typedef std::vector<std::string> v_t;
 556   v_t visited;
 557   for (fs::recursive_directory_iterator i(Twine(TestDirectory)
 558          + "/recursive", ec), e; i != e; i.increment(ec)){
 559     ASSERT_NO_ERROR(ec);
 560     if (path::filename(i->path()) == "p1") {
 561       i.pop();
 562       // FIXME: recursive_directory_iterator should be more robust.
 563       if (i == e) break;
 564     }
 565     if (path::filename(i->path()) == "dontlookhere")
 566       i.no_push();
 567     visited.push_back(path::filename(i->path()));
 568   }
 569   v_t::const_iterator a0 = std::find(visited.begin(), visited.end(), "a0");
 570   v_t::const_iterator aa1 = std::find(visited.begin(), visited.end(), "aa1");
 571   v_t::const_iterator ab1 = std::find(visited.begin(), visited.end(), "ab1");
 572   v_t::const_iterator dontlookhere = std::find(visited.begin(), visited.end(),
 573                                                "dontlookhere");
 574   v_t::const_iterator da1 = std::find(visited.begin(), visited.end(), "da1");
 575   v_t::const_iterator z0 = std::find(visited.begin(), visited.end(), "z0");
 576   v_t::const_iterator za1 = std::find(visited.begin(), visited.end(), "za1");
 577   v_t::const_iterator pop = std::find(visited.begin(), visited.end(), "pop");
 578   v_t::const_iterator p1 = std::find(visited.begin(), visited.end(), "p1");
 579
 580   // Make sure that each path was visited correctly.
 581   ASSERT_NE(a0, visited.end());
 582   ASSERT_NE(aa1, visited.end());
 583   ASSERT_NE(ab1, visited.end());
 584   ASSERT_NE(dontlookhere, visited.end());
 585   ASSERT_EQ(da1, visited.end()); // Not visited.
 586   ASSERT_NE(z0, visited.end());
 587   ASSERT_NE(za1, visited.end());
 588   ASSERT_NE(pop, visited.end());
 589   ASSERT_EQ(p1, visited.end()); // Not visited.
 590
 591   // Make sure that parents were visited before children. No other ordering
 592   // guarantees can be made across siblings.
 593   ASSERT_LT(a0, aa1);
 594   ASSERT_LT(a0, ab1);
 595   ASSERT_LT(z0, za1);
 596
 597   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/aa1"));
 598   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0/ab1"));
 599   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/a0"));
 600   ASSERT_NO_ERROR(
 601       fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere/da1"));
 602   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/dontlookhere"));
 603   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop/p1"));
 604   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/pop"));
 605   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0/za1"));
 606   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive/z0"));
 607   ASSERT_NO_ERROR(fs::remove(Twine(TestDirectory) + "/recursive"));
 608 }
 609
 610 const char archive[] = "!<arch>\x0A";
 611 const char bitcode[] = "\xde\xc0\x17\x0b";
 612 const char coff_object[] = "\x00\x00......";
 613 const char coff_bigobj[] = "\x00\x00\xff\xff\x00\x02......"
 614     "\xc7\xa1\xba\xd1\xee\xba\xa9\x4b\xaf\x20\xfa\xf6\x6a\xa4\xdc\xb8";
 615 const char coff_import_library[] = "\x00\x00\xff\xff....";
 616 const char elf_relocatable[] = { 0x7f, 'E', 'L', 'F', 1, 2, 1, 0, 0,
 617                                  0,    0,   0,   0,   0, 0, 0, 0, 1 };
 618 const char macho_universal_binary[] = "\xca\xfe\xba\xbe...\0x00";
 619 const char macho_object[] = "\xfe\xed\xfa\xce..........\x00\x01";
 620 const char macho_executable[] = "\xfe\xed\xfa\xce..........\x00\x02";
 621 const char macho_fixed_virtual_memory_shared_lib[] =
 622     "\xfe\xed\xfa\xce..........\x00\x03";
 623 const char macho_core[] = "\xfe\xed\xfa\xce..........\x00\x04";
 624 const char macho_preload_executable[] = "\xfe\xed\xfa\xce..........\x00\x05";
 625 const char macho_dynamically_linked_shared_lib[] =
 626     "\xfe\xed\xfa\xce..........\x00\x06";
 627 const char macho_dynamic_linker[] = "\xfe\xed\xfa\xce..........\x00\x07";
 628 const char macho_bundle[] = "\xfe\xed\xfa\xce..........\x00\x08";
 629 const char macho_dsym_companion[] = "\xfe\xed\xfa\xce..........\x00\x0a";
 630 const char macho_kext_bundle[] = "\xfe\xed\xfa\xce..........\x00\x0b";
 631 const char windows_resource[] = "\x00\x00\x00\x00\x020\x00\x00\x00\xff";
 632 const char macho_dynamically_linked_shared_lib_stub[] =
 633     "\xfe\xed\xfa\xce..........\x00\x09";
 634
 635 TEST_F(FileSystemTest, Magic) {
 636   struct type {
 637     const char *filename;
 638     const char *magic_str;
 639     size_t magic_str_len;
 640     fs::file_magic magic;
 641   } types[] = {
 642 #define DEFINE(magic)                                           \
 643     { #magic, magic, sizeof(magic), fs::file_magic::magic }
 644     DEFINE(archive),
 645     DEFINE(bitcode),
 646     DEFINE(coff_object),
 647     { "coff_bigobj", coff_bigobj, sizeof(coff_bigobj), fs::file_magic::coff_object },
 648     DEFINE(coff_import_library),
 649     DEFINE(elf_relocatable),
 650     DEFINE(macho_universal_binary),
 651     DEFINE(macho_object),
 652     DEFINE(macho_executable),
 653     DEFINE(macho_fixed_virtual_memory_shared_lib),
 654     DEFINE(macho_core),
 655     DEFINE(macho_preload_executable),
 656     DEFINE(macho_dynamically_linked_shared_lib),
 657     DEFINE(macho_dynamic_linker),
 658     DEFINE(macho_bundle),
 659     DEFINE(macho_dynamically_linked_shared_lib_stub),
 660     DEFINE(macho_dsym_companion),
 661     DEFINE(macho_kext_bundle),
 662     DEFINE(windows_resource)
 663 #undef DEFINE
 664     };
 665
 666   // Create some files filled with magic.
 667   for (type *i = types, *e = types + (sizeof(types) / sizeof(type)); i != e;
 668                                                                      ++i) {
 669     SmallString<128> file_pathname(TestDirectory);
 670     path::append(file_pathname, i->filename);
 671     std::error_code EC;
 672     raw_fd_ostream file(file_pathname, EC, sys::fs::F_None);
 673     ASSERT_FALSE(file.has_error());
 674     StringRef magic(i->magic_str, i->magic_str_len);
 675     file << magic;
 676     file.close();
 677     EXPECT_EQ(i->magic, fs::identify_magic(magic));
 678     ASSERT_NO_ERROR(fs::remove(Twine(file_pathname)));
 679   }
 680 }
 681
 682 #ifdef LLVM_ON_WIN32
 683 TEST_F(FileSystemTest, CarriageReturn) {
 684   SmallString<128> FilePathname(TestDirectory);
 685   std::error_code EC;
 686   path::append(FilePathname, "test");
 687
 688   {
 689     raw_fd_ostream File(FilePathname, EC, sys::fs::F_Text);
 690     ASSERT_NO_ERROR(EC);
 691     File << '\n';
 692   }
 693   {
 694     auto Buf = MemoryBuffer::getFile(FilePathname.str());
 695     EXPECT_TRUE((bool)Buf);
 696     EXPECT_EQ(Buf.get()->getBuffer(), "\r\n");
 697   }
 698
 699   {
 700     raw_fd_ostream File(FilePathname, EC, sys::fs::F_None);
 701     ASSERT_NO_ERROR(EC);
 702     File << '\n';
 703   }
 704   {
 705     auto Buf = MemoryBuffer::getFile(FilePathname.str());
 706     EXPECT_TRUE((bool)Buf);
 707     EXPECT_EQ(Buf.get()->getBuffer(), "\n");
 708   }
 709   ASSERT_NO_ERROR(fs::remove(Twine(FilePathname)));
 710 }
 711 #endif
 712
 713 TEST_F(FileSystemTest, Resize) {
 714   int FD;
 715   SmallString<64> TempPath;
 716   ASSERT_NO_ERROR(fs::createTemporaryFile("prefix", "temp", FD, TempPath));
 717   ASSERT_NO_ERROR(fs::resize_file(FD, 123));
 718   fs::file_status Status;
 719   ASSERT_NO_ERROR(fs::status(FD, Status));
 720   ASSERT_EQ(Status.getSize(), 123U);
 721 }
 722
 723 TEST_F(FileSystemTest, FileMapping) {
 724   // Create a temp file.
 725   int FileDescriptor;
 726   SmallString<64> TempPath;
 727   ASSERT_NO_ERROR(
 728       fs::createTemporaryFile("prefix", "temp", FileDescriptor, TempPath));
 729   unsigned Size = 4096;
 730   ASSERT_NO_ERROR(fs::resize_file(FileDescriptor, Size));
 731
 732   // Map in temp file and add some content
 733   std::error_code EC;
 734   StringRef Val("hello there");
 735   {
 736     fs::mapped_file_region mfr(FileDescriptor,
 737                                fs::mapped_file_region::readwrite, Size, 0, EC);
 738     ASSERT_NO_ERROR(EC);
 739     std::copy(Val.begin(), Val.end(), mfr.data());
 740     // Explicitly add a 0.
 741     mfr.data()[Val.size()] = 0;
 742     // Unmap temp file
 743   }
 744
 745   // Map it back in read-only
 746   int FD;
 747   EC = fs::openFileForRead(Twine(TempPath), FD);
 748   ASSERT_NO_ERROR(EC);
 749   fs::mapped_file_region mfr(FD, fs::mapped_file_region::readonly, Size, 0, EC);
 750   ASSERT_NO_ERROR(EC);
 751
 752   // Verify content
 753   EXPECT_EQ(StringRef(mfr.const_data()), Val);
 754
 755   // Unmap temp file
 756   fs::mapped_file_region m(FD, fs::mapped_file_region::readonly, Size, 0, EC);
 757   ASSERT_NO_ERROR(EC);
 758   ASSERT_EQ(close(FD), 0);
 759 }
 760
 761 TEST(Support, NormalizePath) {
 762 #if defined(LLVM_ON_WIN32)
 763 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
 764   EXPECT_EQ(path__, windows__);
 765 #else
 766 #define EXPECT_PATH_IS(path__, windows__, not_windows__)                        \
 767   EXPECT_EQ(path__, not_windows__);
 768 #endif
 769
 770   SmallString<64> Path1("a");
 771   SmallString<64> Path2("a/b");
 772   SmallString<64> Path3("a\\b");
 773   SmallString<64> Path4("a\\\\b");
 774   SmallString<64> Path5("\\a");
 775   SmallString<64> Path6("a\\");
 776
 777   path::native(Path1);
 778   EXPECT_PATH_IS(Path1, "a", "a");
 779
 780   path::native(Path2);
 781   EXPECT_PATH_IS(Path2, "a\\b", "a/b");
 782
 783   path::native(Path3);
 784   EXPECT_PATH_IS(Path3, "a\\b", "a/b");
 785
 786   path::native(Path4);
 787   EXPECT_PATH_IS(Path4, "a\\\\b", "a\\\\b");
 788
 789   path::native(Path5);
 790   EXPECT_PATH_IS(Path5, "\\a", "/a");
 791
 792   path::native(Path6);
 793   EXPECT_PATH_IS(Path6, "a\\", "a/");
 794
 795 #undef EXPECT_PATH_IS
 796 }
 797
 798 TEST(Support, RemoveLeadingDotSlash) {
 799   StringRef Path1("././/foolz/wat");
 800   StringRef Path2("./////");
 801
 802   Path1 = path::remove_leading_dotslash(Path1);
 803   EXPECT_EQ(Path1, "foolz/wat");
 804   Path2 = path::remove_leading_dotslash(Path2);
 805   EXPECT_EQ(Path2, "");
 806 }
 807 } // anonymous namespace