unittests/Support/FileOutputBufferTest.cpp

   1 //===- llvm/unittest/Support/FileOutputBuffer.cpp - unit 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/Errc.h"
  11 #include "llvm/Support/ErrorHandling.h"
  12 #include "llvm/Support/FileOutputBuffer.h"
  13 #include "llvm/Support/FileSystem.h"
  14 #include "llvm/Support/Path.h"
  15 #include "llvm/Support/raw_ostream.h"
  16 #include "gtest/gtest.h"
  17
  18 using namespace llvm;
  19 using namespace llvm::sys;
  20
  21 #define ASSERT_NO_ERROR(x)                                                     \
  22   if (std::error_code ASSERT_NO_ERROR_ec = x) {                                \
  23     errs() << #x ": did not return errc::success.\n"                           \
  24            << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n"           \
  25            << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n";       \
  26   } else {                                                                     \
  27   }
  28
  29 namespace {
  30 TEST(FileOutputBuffer, Test) {
  31   // Create unique temporary directory for these tests
  32   SmallString<128> TestDirectory;
  33   {
  34     ASSERT_NO_ERROR(
  35         fs::createUniqueDirectory("FileOutputBuffer-test", TestDirectory));
  36   }
  37
  38   // TEST 1: Verify commit case.
  39   SmallString<128> File1(TestDirectory);
  40         File1.append("/file1");
  41   {
  42     std::unique_ptr<FileOutputBuffer> Buffer;
  43     ASSERT_NO_ERROR(FileOutputBuffer::create(File1, 8192, Buffer));
  44     // Start buffer with special header.
  45     memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
  46     // Write to end of buffer to verify it is writable.
  47     memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
  48     // Commit buffer.
  49     ASSERT_NO_ERROR(Buffer->commit());
  50   }
  51
  52   // Verify file is correct size.
  53   uint64_t File1Size;
  54   ASSERT_NO_ERROR(fs::file_size(Twine(File1), File1Size));
  55   ASSERT_EQ(File1Size, 8192ULL);
  56   ASSERT_NO_ERROR(fs::remove(File1.str()));
  57
  58         // TEST 2: Verify abort case.
  59   SmallString<128> File2(TestDirectory);
  60         File2.append("/file2");
  61   {
  62     std::unique_ptr<FileOutputBuffer> Buffer2;
  63     ASSERT_NO_ERROR(FileOutputBuffer::create(File2, 8192, Buffer2));
  64     // Fill buffer with special header.
  65     memcpy(Buffer2->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
  66     // Do *not* commit buffer.
  67   }
  68   // Verify file does not exist (because buffer not committed).
  69   ASSERT_EQ(fs::access(Twine(File2), fs::AccessMode::Exist),
  70             errc::no_such_file_or_directory);
  71   ASSERT_NO_ERROR(fs::remove(File2.str()));
  72
  73   // TEST 3: Verify sizing down case.
  74   SmallString<128> File3(TestDirectory);
  75         File3.append("/file3");
  76   {
  77     std::unique_ptr<FileOutputBuffer> Buffer;
  78     ASSERT_NO_ERROR(FileOutputBuffer::create(File3, 8192000, Buffer));
  79     // Start buffer with special header.
  80     memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
  81     // Write to end of buffer to verify it is writable.
  82     memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
  83     ASSERT_NO_ERROR(Buffer->commit());
  84   }
  85
  86   // Verify file is correct size.
  87   uint64_t File3Size;
  88   ASSERT_NO_ERROR(fs::file_size(Twine(File3), File3Size));
  89   ASSERT_EQ(File3Size, 8192000ULL);
  90   ASSERT_NO_ERROR(fs::remove(File3.str()));
  91
  92   // TEST 4: Verify file can be made executable.
  93   SmallString<128> File4(TestDirectory);
  94         File4.append("/file4");
  95   {
  96     std::unique_ptr<FileOutputBuffer> Buffer;
  97     ASSERT_NO_ERROR(FileOutputBuffer::create(File4, 8192, Buffer,
  98                                               FileOutputBuffer::F_executable));
  99     // Start buffer with special header.
 100     memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
 101     // Commit buffer.
 102     ASSERT_NO_ERROR(Buffer->commit());
 103   }
 104   // Verify file exists and is executable.
 105   fs::file_status Status;
 106   ASSERT_NO_ERROR(fs::status(Twine(File4), Status));
 107   bool IsExecutable = (Status.permissions() & fs::owner_exe);
 108   EXPECT_TRUE(IsExecutable);
 109   ASSERT_NO_ERROR(fs::remove(File4.str()));
 110
 111   // Clean up.
 112   ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));
 113 }
 114 } // anonymous namespace