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