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llvm-project/llvm/unittests/Support/raw_ostream_test.cpp

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//===- llvm/unittest/Support/raw_ostream_test.cpp - raw_ostream tests -----===//
//
// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.
// See https://llvm.org/LICENSE.txt for license information.
// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception
//
//===----------------------------------------------------------------------===//
#include "llvm/ADT/SmallString.h"
#include "llvm/Support/Errc.h"
#include "llvm/Support/FileSystem.h"
#include "llvm/Support/FileUtilities.h"
#include "llvm/Support/Format.h"
#include "llvm/Support/MemoryBuffer.h"
#include "llvm/Support/raw_ostream.h"
#include "llvm/Testing/Support/Error.h"
#include "gtest/gtest.h"
using namespace llvm;
namespace {
template<typename T> std::string printToString(const T &Value) {
std::string res;
llvm::raw_string_ostream OS(res);
OS.SetBuffered();
OS << Value;
OS.flush();
return res;
}
/// printToString - Print the given value to a stream which only has \arg
/// BytesLeftInBuffer bytes left in the buffer. This is useful for testing edge
/// cases in the buffer handling logic.
template<typename T> std::string printToString(const T &Value,
unsigned BytesLeftInBuffer) {
// FIXME: This is relying on internal knowledge of how raw_ostream works to
// get the buffer position right.
SmallString<256> SVec;
assert(BytesLeftInBuffer < 256 && "Invalid buffer count!");
llvm::raw_svector_ostream OS(SVec);
unsigned StartIndex = 256 - BytesLeftInBuffer;
for (unsigned i = 0; i != StartIndex; ++i)
OS << '?';
OS << Value;
return std::string(OS.str().substr(StartIndex));
}
template<typename T> std::string printToStringUnbuffered(const T &Value) {
std::string res;
llvm::raw_string_ostream OS(res);
OS.SetUnbuffered();
OS << Value;
return res;
}
struct X {};
raw_ostream &operator<<(raw_ostream &OS, const X &) { return OS << 'X'; }
TEST(raw_ostreamTest, Types_Buffered) {
// Char
EXPECT_EQ("c", printToString('c'));
// String
EXPECT_EQ("hello", printToString("hello"));
EXPECT_EQ("hello", printToString(std::string("hello")));
// Int
EXPECT_EQ("0", printToString(0));
EXPECT_EQ("2425", printToString(2425));
EXPECT_EQ("-2425", printToString(-2425));
// Long long
EXPECT_EQ("0", printToString(0LL));
EXPECT_EQ("257257257235709", printToString(257257257235709LL));
EXPECT_EQ("-257257257235709", printToString(-257257257235709LL));
// Double
EXPECT_EQ("1.100000e+00", printToString(1.1));
// void*
EXPECT_EQ("0x0", printToString((void*) nullptr));
EXPECT_EQ("0xbeef", printToString((void*) 0xbeefLL));
EXPECT_EQ("0xdeadbeef", printToString((void*) 0xdeadbeefLL));
// Min and max.
EXPECT_EQ("18446744073709551615", printToString(UINT64_MAX));
EXPECT_EQ("-9223372036854775808", printToString(INT64_MIN));
// X, checking free operator<<().
EXPECT_EQ("X", printToString(X{}));
}
TEST(raw_ostreamTest, Types_Unbuffered) {
// Char
EXPECT_EQ("c", printToStringUnbuffered('c'));
// String
EXPECT_EQ("hello", printToStringUnbuffered("hello"));
EXPECT_EQ("hello", printToStringUnbuffered(std::string("hello")));
// Int
EXPECT_EQ("0", printToStringUnbuffered(0));
EXPECT_EQ("2425", printToStringUnbuffered(2425));
EXPECT_EQ("-2425", printToStringUnbuffered(-2425));
// Long long
EXPECT_EQ("0", printToStringUnbuffered(0LL));
EXPECT_EQ("257257257235709", printToStringUnbuffered(257257257235709LL));
EXPECT_EQ("-257257257235709", printToStringUnbuffered(-257257257235709LL));
// Double
EXPECT_EQ("1.100000e+00", printToStringUnbuffered(1.1));
// void*
EXPECT_EQ("0x0", printToStringUnbuffered((void*) nullptr));
EXPECT_EQ("0xbeef", printToStringUnbuffered((void*) 0xbeefLL));
EXPECT_EQ("0xdeadbeef", printToStringUnbuffered((void*) 0xdeadbeefLL));
// Min and max.
EXPECT_EQ("18446744073709551615", printToStringUnbuffered(UINT64_MAX));
EXPECT_EQ("-9223372036854775808", printToStringUnbuffered(INT64_MIN));
// X, checking free operator<<().
EXPECT_EQ("X", printToString(X{}));
}
TEST(raw_ostreamTest, BufferEdge) {
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 1));
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 2));
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 3));
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 4));
EXPECT_EQ("1.20", printToString(format("%.2f", 1.2), 10));
}
TEST(raw_ostreamTest, TinyBuffer) {
std::string Str;
raw_string_ostream OS(Str);
OS.SetBufferSize(1);
OS << "hello";
OS << 1;
OS << 'w' << 'o' << 'r' << 'l' << 'd';
OS.flush();
EXPECT_EQ("hello1world", Str);
}
TEST(raw_ostreamTest, WriteEscaped) {
std::string Str;
Str = "";
raw_string_ostream(Str).write_escaped("hi");
EXPECT_EQ("hi", Str);
Str = "";
raw_string_ostream(Str).write_escaped("\\\t\n\"");
EXPECT_EQ("\\\\\\t\\n\\\"", Str);
Str = "";
raw_string_ostream(Str).write_escaped("\1\10\200");
EXPECT_EQ("\\001\\010\\200", Str);
}
TEST(raw_ostreamTest, Justify) {
EXPECT_EQ("xyz ", printToString(left_justify("xyz", 6), 6));
EXPECT_EQ("abc", printToString(left_justify("abc", 3), 3));
EXPECT_EQ("big", printToString(left_justify("big", 1), 3));
EXPECT_EQ(" xyz", printToString(right_justify("xyz", 6), 6));
EXPECT_EQ("abc", printToString(right_justify("abc", 3), 3));
EXPECT_EQ("big", printToString(right_justify("big", 1), 3));
EXPECT_EQ(" on ", printToString(center_justify("on", 9), 9));
EXPECT_EQ(" off ", printToString(center_justify("off", 10), 10));
EXPECT_EQ("single ", printToString(center_justify("single", 7), 7));
EXPECT_EQ("none", printToString(center_justify("none", 1), 4));
EXPECT_EQ("none", printToString(center_justify("none", 1), 1));
}
TEST(raw_ostreamTest, FormatHex) {
EXPECT_EQ("0x1234", printToString(format_hex(0x1234, 6), 6));
EXPECT_EQ("0x001234", printToString(format_hex(0x1234, 8), 8));
EXPECT_EQ("0x00001234", printToString(format_hex(0x1234, 10), 10));
EXPECT_EQ("0x1234", printToString(format_hex(0x1234, 4), 6));
EXPECT_EQ("0xff", printToString(format_hex(255, 4), 4));
EXPECT_EQ("0xFF", printToString(format_hex(255, 4, true), 4));
EXPECT_EQ("0x1", printToString(format_hex(1, 3), 3));
EXPECT_EQ("0x12", printToString(format_hex(0x12, 3), 4));
EXPECT_EQ("0x123", printToString(format_hex(0x123, 3), 5));
EXPECT_EQ("FF", printToString(format_hex_no_prefix(0xFF, 2, true), 4));
EXPECT_EQ("ABCD", printToString(format_hex_no_prefix(0xABCD, 2, true), 4));
EXPECT_EQ("0xffffffffffffffff",
printToString(format_hex(UINT64_MAX, 18), 18));
EXPECT_EQ("0x8000000000000000",
printToString(format_hex((INT64_MIN), 18), 18));
}
TEST(raw_ostreamTest, FormatDecimal) {
EXPECT_EQ(" 0", printToString(format_decimal(0, 4), 4));
EXPECT_EQ(" -1", printToString(format_decimal(-1, 4), 4));
EXPECT_EQ(" -1", printToString(format_decimal(-1, 6), 6));
EXPECT_EQ("1234567890", printToString(format_decimal(1234567890, 10), 10));
EXPECT_EQ(" 9223372036854775807",
printToString(format_decimal(INT64_MAX, 21), 21));
EXPECT_EQ(" -9223372036854775808",
printToString(format_decimal(INT64_MIN, 21), 21));
}
static std::string formatted_bytes_str(ArrayRef<uint8_t> Bytes,
llvm::Optional<uint64_t> Offset = None,
uint32_t NumPerLine = 16,
uint8_t ByteGroupSize = 4) {
std::string S;
raw_string_ostream Str(S);
Str << format_bytes(Bytes, Offset, NumPerLine, ByteGroupSize);
Str.flush();
return S;
}
static std::string format_bytes_with_ascii_str(ArrayRef<uint8_t> Bytes,
Optional<uint64_t> Offset = None,
uint32_t NumPerLine = 16,
uint8_t ByteGroupSize = 4) {
std::string S;
raw_string_ostream Str(S);
Str << format_bytes_with_ascii(Bytes, Offset, NumPerLine, ByteGroupSize);
Str.flush();
return S;
}
TEST(raw_ostreamTest, FormattedHexBytes) {
std::vector<uint8_t> Buf = {'a', 'b', 'c', 'd', 'e', 'f', 'g', 'h', 'i',
'j', 'k', 'l', 'm', 'n', 'o', 'p', 'q', 'r',
's', 't', 'u', 'v', 'w', 'x', 'y', 'z', '0',
'1', '2', '3', '4', '5', '6', '7', '8', '9'};
ArrayRef<uint8_t> B(Buf);
// Test invalid input.
EXPECT_EQ("", formatted_bytes_str(ArrayRef<uint8_t>()));
EXPECT_EQ("", format_bytes_with_ascii_str(ArrayRef<uint8_t>()));
//----------------------------------------------------------------------
// Test hex byte output with the default 4 byte groups
//----------------------------------------------------------------------
EXPECT_EQ("61", formatted_bytes_str(B.take_front()));
EXPECT_EQ("61626364 65", formatted_bytes_str(B.take_front(5)));
// Test that 16 bytes get written to a line correctly.
EXPECT_EQ("61626364 65666768 696a6b6c 6d6e6f70",
formatted_bytes_str(B.take_front(16)));
// Test raw bytes with default 16 bytes per line wrapping.
EXPECT_EQ("61626364 65666768 696a6b6c 6d6e6f70\n71",
formatted_bytes_str(B.take_front(17)));
// Test raw bytes with 1 bytes per line wrapping.
EXPECT_EQ("61\n62\n63\n64\n65\n66",
formatted_bytes_str(B.take_front(6), None, 1));
// Test raw bytes with 7 bytes per line wrapping.
EXPECT_EQ("61626364 656667\n68696a6b 6c6d6e\n6f7071",
formatted_bytes_str(B.take_front(17), None, 7));
// Test raw bytes with 8 bytes per line wrapping.
EXPECT_EQ("61626364 65666768\n696a6b6c 6d6e6f70\n71",
formatted_bytes_str(B.take_front(17), None, 8));
//----------------------------------------------------------------------
// Test hex byte output with the 1 byte groups
//----------------------------------------------------------------------
EXPECT_EQ("61 62 63 64 65",
formatted_bytes_str(B.take_front(5), None, 16, 1));
// Test that 16 bytes get written to a line correctly.
EXPECT_EQ("61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f 70",
formatted_bytes_str(B.take_front(16), None, 16, 1));
// Test raw bytes with default 16 bytes per line wrapping.
EXPECT_EQ("61 62 63 64 65 66 67 68 69 6a 6b 6c 6d 6e 6f 70\n71",
formatted_bytes_str(B.take_front(17), None, 16, 1));
// Test raw bytes with 7 bytes per line wrapping.
EXPECT_EQ("61 62 63 64 65 66 67\n68 69 6a 6b 6c 6d 6e\n6f 70 71",
formatted_bytes_str(B.take_front(17), None, 7, 1));
// Test raw bytes with 8 bytes per line wrapping.
EXPECT_EQ("61 62 63 64 65 66 67 68\n69 6a 6b 6c 6d 6e 6f 70\n71",
formatted_bytes_str(B.take_front(17), None, 8, 1));
//----------------------------------------------------------------------
// Test hex byte output with the 2 byte groups
//----------------------------------------------------------------------
EXPECT_EQ("6162 6364 65", formatted_bytes_str(B.take_front(5), None, 16, 2));
// Test that 16 bytes get written to a line correctly.
EXPECT_EQ("6162 6364 6566 6768 696a 6b6c 6d6e 6f70",
formatted_bytes_str(B.take_front(16), None, 16, 2));
// Test raw bytes with default 16 bytes per line wrapping.
EXPECT_EQ("6162 6364 6566 6768 696a 6b6c 6d6e 6f70\n71",
formatted_bytes_str(B.take_front(17), None, 16, 2));
// Test raw bytes with 7 bytes per line wrapping.
EXPECT_EQ("6162 6364 6566 67\n6869 6a6b 6c6d 6e\n6f70 71",
formatted_bytes_str(B.take_front(17), None, 7, 2));
// Test raw bytes with 8 bytes per line wrapping.
EXPECT_EQ("6162 6364 6566 6768\n696a 6b6c 6d6e 6f70\n71",
formatted_bytes_str(B.take_front(17), None, 8, 2));
//----------------------------------------------------------------------
// Test hex bytes with offset with the default 4 byte groups.
//----------------------------------------------------------------------
EXPECT_EQ("0000: 61", formatted_bytes_str(B.take_front(), 0x0));
EXPECT_EQ("1000: 61", formatted_bytes_str(B.take_front(), 0x1000));
EXPECT_EQ("1000: 61\n1001: 62",
formatted_bytes_str(B.take_front(2), 0x1000, 1));
//----------------------------------------------------------------------
// Test hex bytes with ASCII with the default 4 byte groups.
//----------------------------------------------------------------------
EXPECT_EQ("61626364 65666768 696a6b6c 6d6e6f70 |abcdefghijklmnop|",
format_bytes_with_ascii_str(B.take_front(16)));
EXPECT_EQ("61626364 65666768 |abcdefgh|\n"
"696a6b6c 6d6e6f70 |ijklmnop|",
format_bytes_with_ascii_str(B.take_front(16), None, 8));
EXPECT_EQ("61626364 65666768 |abcdefgh|\n696a6b6c |ijkl|",
format_bytes_with_ascii_str(B.take_front(12), None, 8));
std::vector<uint8_t> Unprintable = {'a', '\x1e', 'b', '\x1f'};
// Make sure the ASCII is still lined up correctly when fewer bytes than 16
// bytes per line are available. The ASCII should still be aligned as if 16
// bytes of hex might be displayed.
EXPECT_EQ("611e621f |a.b.|",
format_bytes_with_ascii_str(Unprintable));
//----------------------------------------------------------------------
// Test hex bytes with ASCII with offsets with the default 4 byte groups.
//----------------------------------------------------------------------
EXPECT_EQ("0000: 61626364 65666768 "
"696a6b6c 6d6e6f70 |abcdefghijklmnop|",
format_bytes_with_ascii_str(B.take_front(16), 0));
EXPECT_EQ("0000: 61626364 65666768 |abcdefgh|\n"
"0008: 696a6b6c 6d6e6f70 |ijklmnop|",
format_bytes_with_ascii_str(B.take_front(16), 0, 8));
EXPECT_EQ("0000: 61626364 656667 |abcdefg|\n"
"0007: 68696a6b 6c |hijkl|",
format_bytes_with_ascii_str(B.take_front(12), 0, 7));
//----------------------------------------------------------------------
// Test hex bytes with ASCII with offsets with the default 2 byte groups.
//----------------------------------------------------------------------
EXPECT_EQ("0000: 6162 6364 6566 6768 "
"696a 6b6c 6d6e 6f70 |abcdefghijklmnop|",
format_bytes_with_ascii_str(B.take_front(16), 0, 16, 2));
EXPECT_EQ("0000: 6162 6364 6566 6768 |abcdefgh|\n"
"0008: 696a 6b6c 6d6e 6f70 |ijklmnop|",
format_bytes_with_ascii_str(B.take_front(16), 0, 8, 2));
EXPECT_EQ("0000: 6162 6364 6566 67 |abcdefg|\n"
"0007: 6869 6a6b 6c |hijkl|",
format_bytes_with_ascii_str(B.take_front(12), 0, 7, 2));
//----------------------------------------------------------------------
// Test hex bytes with ASCII with offsets with the default 1 byte groups.
//----------------------------------------------------------------------
EXPECT_EQ("0000: 61 62 63 64 65 66 67 68 "
"69 6a 6b 6c 6d 6e 6f 70 |abcdefghijklmnop|",
format_bytes_with_ascii_str(B.take_front(16), 0, 16, 1));
EXPECT_EQ("0000: 61 62 63 64 65 66 67 68 |abcdefgh|\n"
"0008: 69 6a 6b 6c 6d 6e 6f 70 |ijklmnop|",
format_bytes_with_ascii_str(B.take_front(16), 0, 8, 1));
EXPECT_EQ("0000: 61 62 63 64 65 66 67 |abcdefg|\n"
"0007: 68 69 6a 6b 6c |hijkl|",
format_bytes_with_ascii_str(B.take_front(12), 0, 7, 1));
}
#ifdef LLVM_ON_UNIX
TEST(raw_ostreamTest, Colors) {
{
std::string S;
raw_string_ostream Sos(S);
Sos.enable_colors(false);
Sos.changeColor(raw_ostream::YELLOW);
EXPECT_EQ("", Sos.str());
}
{
std::string S;
raw_string_ostream Sos(S);
Sos.enable_colors(true);
Sos.changeColor(raw_ostream::YELLOW);
EXPECT_EQ("\x1B[0;33m", Sos.str());
}
}
#endif
TEST(raw_fd_ostreamTest, multiple_raw_fd_ostream_to_stdout) {
std::error_code EC;
{ raw_fd_ostream("-", EC, sys::fs::OpenFlags::OF_None); }
{ raw_fd_ostream("-", EC, sys::fs::OpenFlags::OF_None); }
}
TEST(raw_ostreamTest, flush_tied_to_stream_on_write) {
std::string TiedToBuffer;
raw_string_ostream TiedTo(TiedToBuffer);
TiedTo.SetBuffered();
TiedTo << "a";
std::string Buffer;
raw_string_ostream TiedStream(Buffer);
TiedStream.tie(&TiedTo);
// Sanity check that the stream hasn't already been flushed.
EXPECT_EQ("", TiedToBuffer);
// Empty string doesn't cause a flush of TiedTo.
TiedStream << "";
EXPECT_EQ("", TiedToBuffer);
// Non-empty strings trigger flush of TiedTo.
TiedStream << "abc";
EXPECT_EQ("a", TiedToBuffer);
// Single char write flushes TiedTo.
TiedTo << "c";
TiedStream << 'd';
EXPECT_EQ("ac", TiedToBuffer);
// Write to buffered stream without flush does not flush TiedTo.
TiedStream.SetBuffered();
TiedStream.SetBufferSize(2);
TiedTo << "e";
TiedStream << "f";
EXPECT_EQ("ac", TiedToBuffer);
// Explicit flush of buffered stream flushes TiedTo.
TiedStream.flush();
EXPECT_EQ("ace", TiedToBuffer);
// Explicit flush of buffered stream with empty buffer does not flush TiedTo.
TiedTo << "g";
TiedStream.flush();
EXPECT_EQ("ace", TiedToBuffer);
// Write of data to empty buffer that is greater than buffer size flushes
// TiedTo.
TiedStream << "hijklm";
EXPECT_EQ("aceg", TiedToBuffer);
// Write of data that overflows buffer size also flushes TiedTo.
TiedStream.flush();
TiedStream << "n";
TiedTo << "o";
TiedStream << "pq";
EXPECT_EQ("acego", TiedToBuffer);
// Streams can be tied to each other safely.
TiedStream.flush();
Buffer = "";
TiedTo.tie(&TiedStream);
TiedTo.SetBufferSize(2);
TiedStream << "r";
TiedTo << "s";
EXPECT_EQ("", Buffer);
EXPECT_EQ("acego", TiedToBuffer);
TiedTo << "tuv";
EXPECT_EQ("r", Buffer);
TiedStream << "wxy";
EXPECT_EQ("acegostuv", TiedToBuffer);
// The x remains in the buffer, since it was written after the flush of
// TiedTo.
EXPECT_EQ("rwx", Buffer);
TiedTo.tie(nullptr);
// Calling tie with nullptr unties stream.
TiedStream.SetUnbuffered();
TiedStream.tie(nullptr);
TiedTo << "y";
TiedStream << "0";
EXPECT_EQ("acegostuv", TiedToBuffer);
TiedTo.flush();
TiedStream.flush();
}
TEST(raw_ostreamTest, reserve_stream) {
std::string Str;
raw_string_ostream OS(Str);
OS << "11111111111111111111";
uint64_t CurrentPos = OS.tell();
OS.reserveExtraSpace(1000);
EXPECT_GE(Str.capacity(), CurrentPos + 1000);
OS << "hello";
OS << 1;
OS << 'w' << 'o' << 'r' << 'l' << 'd';
OS.flush();
EXPECT_EQ("11111111111111111111hello1world", Str);
}
static void checkFileData(StringRef FileName, StringRef GoldenData) {
ErrorOr<std::unique_ptr<MemoryBuffer>> BufOrErr =
MemoryBuffer::getFileOrSTDIN(FileName);
EXPECT_FALSE(BufOrErr.getError());
EXPECT_EQ((*BufOrErr)->getBufferSize(), GoldenData.size());
EXPECT_EQ(memcmp((*BufOrErr)->getBufferStart(), GoldenData.data(),
GoldenData.size()),
0);
}
TEST(raw_ostreamTest, writeToOutputFile) {
SmallString<64> Path;
int FD;
ASSERT_FALSE(sys::fs::createTemporaryFile("foo", "bar", FD, Path));
FileRemover Cleanup(Path);
ASSERT_THAT_ERROR(writeToOutput(Path,
[](raw_ostream &Out) -> Error {
Out << "HelloWorld";
return Error::success();
}),
Succeeded());
checkFileData(Path, "HelloWorld");
}
TEST(raw_ostreamTest, writeToNonexistingPath) {
StringRef FileName = "/_bad/_path";
std::string ErrorMessage = toString(createFileError(
FileName, make_error_code(errc::no_such_file_or_directory)));
EXPECT_THAT_ERROR(writeToOutput(FileName,
[](raw_ostream &Out) -> Error {
Out << "HelloWorld";
return Error::success();
}),
FailedWithMessage(ErrorMessage));
}
TEST(raw_ostreamTest, writeToDevNull) {
bool DevNullIsUsed = false;
EXPECT_THAT_ERROR(
writeToOutput("/dev/null",
[&](raw_ostream &Out) -> Error {
DevNullIsUsed =
testing::internal::CheckedDowncastToActualType<
raw_null_ostream, raw_ostream>(&Out);
return Error::success();
}),
Succeeded());
EXPECT_TRUE(DevNullIsUsed);
}
TEST(raw_ostreamTest, writeToStdOut) {
outs().flush();
testing::internal::CaptureStdout();
EXPECT_THAT_ERROR(writeToOutput("-",
[](raw_ostream &Out) -> Error {
Out << "HelloWorld";
return Error::success();
}),
Succeeded());
outs().flush();
std::string CapturedStdOut = testing::internal::GetCapturedStdout();
EXPECT_EQ(CapturedStdOut, "HelloWorld");
}
} // namespace
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