1 //===- llvm/unittest/Support/FileOutputBuffer.cpp - unit tests ------------===//
3 // The LLVM Compiler Infrastructure
5 // This file is distributed under the University of Illinois Open Source
6 // License. See LICENSE.TXT for details.
8 //===----------------------------------------------------------------------===//
10 #include "llvm/Support/FileOutputBuffer.h"
11 #include "llvm/Support/ErrorHandling.h"
12 #include "llvm/Support/FileSystem.h"
13 #include "llvm/Support/Path.h"
14 #include "llvm/Support/raw_ostream.h"
15 #include "gtest/gtest.h"
18 using namespace llvm::sys;
20 #define ASSERT_NO_ERROR(x) \
21 if (std::error_code ASSERT_NO_ERROR_ec = x) { \
22 errs() << #x ": did not return errc::success.\n" \
23 << "error number: " << ASSERT_NO_ERROR_ec.value() << "\n" \
24 << "error message: " << ASSERT_NO_ERROR_ec.message() << "\n"; \
29 TEST(FileOutputBuffer, Test) {
30 // Create unique temporary directory for these tests
31 SmallString<128> TestDirectory;
34 fs::createUniqueDirectory("FileOutputBuffer-test", TestDirectory));
37 // TEST 1: Verify commit case.
38 SmallString<128> File1(TestDirectory);
39 File1.append("/file1");
41 std::unique_ptr<FileOutputBuffer> Buffer;
42 ASSERT_NO_ERROR(FileOutputBuffer::create(File1, 8192, Buffer));
43 // Start buffer with special header.
44 memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
45 // Write to end of buffer to verify it is writable.
46 memcpy(Buffer->getBufferEnd() - 20, "AABBCCDDEEFFGGHHIIJJ", 20);
48 ASSERT_NO_ERROR(Buffer->commit());
51 // Verify file is correct size.
53 ASSERT_NO_ERROR(fs::file_size(Twine(File1), File1Size));
54 ASSERT_EQ(File1Size, 8192ULL);
55 ASSERT_NO_ERROR(fs::remove(File1.str()));
57 // TEST 2: Verify abort case.
58 SmallString<128> File2(TestDirectory);
59 File2.append("/file2");
61 std::unique_ptr<FileOutputBuffer> Buffer2;
62 ASSERT_NO_ERROR(FileOutputBuffer::create(File2, 8192, Buffer2));
63 // Fill buffer with special header.
64 memcpy(Buffer2->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
65 // Do *not* commit buffer.
67 // Verify file does not exist (because buffer not committed).
69 ASSERT_NO_ERROR(fs::exists(Twine(File2), Exists));
71 ASSERT_NO_ERROR(fs::remove(File2.str()));
73 // TEST 3: Verify sizing down case.
74 SmallString<128> File3(TestDirectory);
75 File3.append("/file3");
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 // Commit buffer, but size down to smaller size
84 ASSERT_NO_ERROR(Buffer->commit(5000));
87 // Verify file is correct size.
89 ASSERT_NO_ERROR(fs::file_size(Twine(File3), File3Size));
90 ASSERT_EQ(File3Size, 5000ULL);
91 ASSERT_NO_ERROR(fs::remove(File3.str()));
93 // TEST 4: Verify file can be made executable.
94 SmallString<128> File4(TestDirectory);
95 File4.append("/file4");
97 std::unique_ptr<FileOutputBuffer> Buffer;
98 ASSERT_NO_ERROR(FileOutputBuffer::create(File4, 8192, Buffer,
99 FileOutputBuffer::F_executable));
100 // Start buffer with special header.
101 memcpy(Buffer->getBufferStart(), "AABBCCDDEEFFGGHHIIJJ", 20);
103 ASSERT_NO_ERROR(Buffer->commit());
105 // Verify file exists and is executable.
106 fs::file_status Status;
107 ASSERT_NO_ERROR(fs::status(Twine(File4), Status));
108 bool IsExecutable = (Status.permissions() & fs::owner_exe);
109 EXPECT_TRUE(IsExecutable);
110 ASSERT_NO_ERROR(fs::remove(File4.str()));
113 ASSERT_NO_ERROR(fs::remove(TestDirectory.str()));
115 } // anonymous namespace