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