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llvm-project/llvm/unittests/Support/raw_ostream_test.cpp
Archibald Elliott 38ac4093d9 [NFCI][Support] Avoid ASSERT_/EXPECT_TRUE(A <op> B) 
The error messages in tests are far better when a test fails if the test
is written using ASSERT_/EXPECT_<operator>(A, B) rather than
ASSERT_/EXPECT_TRUE(A <operator> B).

This commit updates all of llvm/unittests/Support to use these macros
where possible.

This change has not been possible in:
- llvm/unittests/Support/FSUniqueIDTest.cpp - due to not overloading
  operators beyond ==, != and <.
- llvm/unittests/Support/BranchProbabilityTest.cpp - where the unchanged
  tests are of the operator overloads themselves.

There are other possibilities of this conversion not being valid, which
have not applied in these tests, as they do not use NULL (they use
nullptr), and they do not use const char* (they use std::string or
StringRef).

Reviewed By: mubashar_

Differential Revision: https://reviews.llvm.org/D117319
2022-01-21 13:15:04 +00:00

552 lines
21 KiB
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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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