Home | History | Annotate | Download | only in Support 
      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     ErrorOr<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
     43         FileOutputBuffer::create(File1, 8192);
     44     ASSERT_NO_ERROR(BufferOrErr.getError());
     45     std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;
     46     // Start buffer with special header.
     47     memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
     48     // Write to end of buffer to verify it is writable.
     49     memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
     50     // Commit buffer.
     51     ASSERT_NO_ERROR(Buffer->commit());
     52   }
     53 
     54   // Verify file is correct size.
     55   uint64_t File1Size;
     56   ASSERT_NO_ERROR(fs::file_size(Twine(File1), File1Size));
     57   ASSERT_EQ(File1Size, 8192ULL);
     58   ASSERT_NO_ERROR(fs::remove(File1.str()));
     59 
     60  	// TEST 2: Verify abort case.
     61   SmallString<128> File2(TestDirectory);
     62 	File2.append("/file2");
     63   {
     64     ErrorOr<std::unique_ptr<FileOutputBuffer>> Buffer2OrErr =
     65         FileOutputBuffer::create(File2, 8192);
     66     ASSERT_NO_ERROR(Buffer2OrErr.getError());
     67     std::unique_ptr<FileOutputBuffer> &Buffer2 = *Buffer2OrErr;
     68     // Fill buffer with special header.
     69     memcpy(Buffer2->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
     70     // Do *not* commit buffer.
     71   }
     72   // Verify file does not exist (because buffer not committed).
     73   ASSERT_EQ(fs::access(Twine(File2), fs::AccessMode::Exist),
     74             errc::no_such_file_or_directory);
     75   ASSERT_NO_ERROR(fs::remove(File2.str()));
     76 
     77   // TEST 3: Verify sizing down case.
     78   SmallString<128> File3(TestDirectory);
     79 	File3.append("/file3");
     80   {
     81     ErrorOr<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
     82         FileOutputBuffer::create(File3, 8192000);
     83     ASSERT_NO_ERROR(BufferOrErr.getError());
     84     std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;
     85     // Start buffer with special header.
     86     memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
     87     // Write to end of buffer to verify it is writable.
     88     memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
     89     ASSERT_NO_ERROR(Buffer->commit());
     90   }
     91 
     92   // Verify file is correct size.
     93   uint64_t File3Size;
     94   ASSERT_NO_ERROR(fs::file_size(Twine(File3), File3Size));
     95   ASSERT_EQ(File3Size, 8192000ULL);
     96   ASSERT_NO_ERROR(fs::remove(File3.str()));
     97 
     98   // TEST 4: Verify file can be made executable.
     99   SmallString<128> File4(TestDirectory);
    100 	File4.append("/file4");
    101   {
    102     ErrorOr<std::unique_ptr<FileOutputBuffer>> BufferOrErr =
    103         FileOutputBuffer::create(File4, 8192, FileOutputBuffer::F_executable);
    104     ASSERT_NO_ERROR(BufferOrErr.getError());
    105     std::unique_ptr<FileOutputBuffer> &Buffer = *BufferOrErr;
    106     // Start buffer with special header.
    107     memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
    108     // Commit buffer.
    109     ASSERT_NO_ERROR(Buffer->commit());
    110   }
    111   // Verify file exists and is executable.
    112   fs::file_status Status;
    113   ASSERT_NO_ERROR(fs::status(Twine(File4), Status));
    114   bool IsExecutable = (Status.permissions() & fs::owner_exe);
    115   EXPECT_TRUE(IsExecutable);
    116   ASSERT_NO_ERROR(fs::remove(File4.str()));
    117 
    118   // Clean up.
    119   ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));
    120 }
    121 } // anonymous namespace
    122