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Keep previous implementation when threads are not available.
This commit is contained in:
davidmatson 2022-09-13 17:08:23 -07:00
parent 713e31cd53
commit 10459a76f7
3 changed files with 365 additions and 278 deletions
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4
src/catch2/internal/catch_compiler_capabilities.hpp
View File

@ -37,10 +37,6 @@
# define CATCH_CPP17_OR_GREATER
# endif
# if (__cplusplus >= 202002L) || (defined(_MSVC_LANG) && _MSVC_LANG >= 202002L)
# define CATCH_CPP20_OR_GREATER
# endif
#endif
// Only GCC compiler should be used in this block, so other compilers trying to

482
src/catch2/internal/catch_output_redirect.cpp
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@ -5,37 +5,46 @@
// https://www.boost.org/LICENSE_1_0.txt)
// SPDX-License-Identifier: BSL-1.0
#include <catch2/internal/catch_output_redirect.hpp>
#include <catch2/internal/catch_enforce.hpp>
#include <catch2/internal/catch_move_and_forward.hpp>
#include <catch2/internal/catch_output_redirect.hpp>
#include <catch2/internal/catch_stdstreams.hpp>
#include <cstdio>
#include <cstring>
#include <sstream>
#if defined(CATCH_CONFIG_NEW_CAPTURE)
#include <catch2/internal/catch_move_and_forward.hpp>
#include <system_error>
#if defined(_MSC_VER)
#include <fcntl.h> // _O_TEXT
#include <io.h> // _close, _dup, _dup2, _fileno, _pipe and _read
#define close _close
#define dup _dup
#define dup2 _dup2
#define fileno _fileno
#else
#include <unistd.h> // close, dup, dup2, fileno, pipe and read
#endif
#if defined( CATCH_CONFIG_NEW_CAPTURE )
# if defined( CATCH_INTERNAL_CONFIG_USE_ASYNC )
# include <system_error>
# if defined( _MSC_VER )
# include <fcntl.h> // _O_TEXT
# include <io.h> // _close, _dup, _dup2, _fileno, _pipe and _read
# define close _close
# define dup _dup
# define dup2 _dup2
# define fileno _fileno
# else
# include <unistd.h> // close, dup, dup2, fileno, pipe and read
# endif
# else
# if defined( _MSC_VER )
# include <io.h> //_dup and _dup2
# define dup _dup
# define dup2 _dup2
# define fileno _fileno
# else
# include <unistd.h> // dup and dup2
# endif
# endif
#endif
namespace Catch {
RedirectedStream::RedirectedStream( std::ostream& originalStream, std::ostream& redirectionStream )
: m_originalStream( originalStream ),
RedirectedStream::RedirectedStream( std::ostream& originalStream,
std::ostream& redirectionStream ):
m_originalStream( originalStream ),
m_redirectionStream( redirectionStream ),
m_prevBuf( m_originalStream.rdbuf() )
{
m_prevBuf( m_originalStream.rdbuf() ) {
m_originalStream.rdbuf( m_redirectionStream.rdbuf() );
}
@ -43,225 +52,282 @@ namespace Catch {
m_originalStream.rdbuf( m_prevBuf );
}
RedirectedStdOut::RedirectedStdOut() : m_cout( Catch::cout(), m_rss.get() ) {}
RedirectedStdOut::RedirectedStdOut():
m_cout( Catch::cout(), m_rss.get() ) {}
auto RedirectedStdOut::str() const -> std::string { return m_rss.str(); }
RedirectedStdErr::RedirectedStdErr()
: m_cerr( Catch::cerr(), m_rss.get() ),
m_clog( Catch::clog(), m_rss.get() )
{}
RedirectedStdErr::RedirectedStdErr():
m_cerr( Catch::cerr(), m_rss.get() ),
m_clog( Catch::clog(), m_rss.get() ) {}
auto RedirectedStdErr::str() const -> std::string { return m_rss.str(); }
RedirectedStreams::RedirectedStreams(std::string& redirectedCout, std::string& redirectedCerr)
: m_redirectedCout(redirectedCout),
m_redirectedCerr(redirectedCerr)
{}
RedirectedStreams::RedirectedStreams( std::string& redirectedCout,
std::string& redirectedCerr ):
m_redirectedCout( redirectedCout ),
m_redirectedCerr( redirectedCerr ) {}
RedirectedStreams::~RedirectedStreams() {
m_redirectedCout += m_redirectedStdOut.str();
m_redirectedCerr += m_redirectedStdErr.str();
}
#if defined(CATCH_CONFIG_NEW_CAPTURE)
#if defined( CATCH_CONFIG_NEW_CAPTURE )
inline void close_or_throw(int descriptor)
{
if (close(descriptor))
{
CATCH_SYSTEM_ERROR(errno, std::generic_category());
}
}
# if defined( CATCH_INTERNAL_CONFIG_USE_ASYNC )
inline int dup_or_throw(int descriptor)
{
int result{ dup(descriptor) };
if (result == -1)
{
CATCH_SYSTEM_ERROR(errno, std::generic_category());
static inline void close_or_throw( int descriptor ) {
if ( close( descriptor ) ) {
CATCH_SYSTEM_ERROR( errno, std::generic_category() );
}
}
return result;
}
static inline int dup_or_throw( int descriptor ) {
int result{ dup( descriptor ) };
inline int dup2_or_throw(int sourceDescriptor, int destinationDescriptor)
{
int result{ dup2(sourceDescriptor, destinationDescriptor) };
if (result == -1)
{
CATCH_SYSTEM_ERROR(errno, std::generic_category());
}
return result;
}
inline int fileno_or_throw(std::FILE* file)
{
int result{ fileno(file) };
if (result == -1)
{
CATCH_SYSTEM_ERROR(errno, std::generic_category());
}
return result;
}
inline void pipe_or_throw(int descriptors[2])
{
#if defined(_MSC_VER)
constexpr int defaultPipeSize{ 0 };
int result{ _pipe(descriptors, defaultPipeSize, _O_TEXT) };
#else
int result{ pipe(descriptors) };
#endif
if (result)
{
CATCH_SYSTEM_ERROR(errno, std::generic_category());
}
}
inline size_t read_or_throw(int descriptor, void* buffer, size_t size)
{
#if defined(_MSC_VER)
int result{ _read(descriptor, buffer, static_cast<unsigned>(size)) };
#else
ssize_t result{ read(descriptor, buffer, size) };
#endif
if (result == -1)
{
CATCH_SYSTEM_ERROR(errno, std::generic_category());
}
return static_cast<size_t>(result);
}
inline void fflush_or_throw(std::FILE* file)
{
if (std::fflush(file))
{
CATCH_SYSTEM_ERROR(errno, std::generic_category());
}
}
jthread::jthread() noexcept : m_thread{} {}
template <typename F, typename... Args>
jthread::jthread(F&& f, Args&&... args) : m_thread{ CATCH_FORWARD(f), CATCH_FORWARD(args)... } {}
// Not exactly like std::jthread, but close enough for the code below.
jthread::~jthread() noexcept
{
if (m_thread.joinable())
{
m_thread.join();
}
}
constexpr UniqueFileDescriptor::UniqueFileDescriptor() noexcept : m_value{} {}
UniqueFileDescriptor::UniqueFileDescriptor(int value) noexcept : m_value{ value } {}
constexpr UniqueFileDescriptor::UniqueFileDescriptor(UniqueFileDescriptor&& other) noexcept :
m_value{ other.m_value }
{
other.m_value = 0;
}
UniqueFileDescriptor::~UniqueFileDescriptor() noexcept
{
if (m_value == 0)
{
return;
}
close_or_throw(m_value); // std::terminate on failure (due to noexcept)
}
UniqueFileDescriptor& UniqueFileDescriptor::operator=(UniqueFileDescriptor&& other) noexcept
{
if (this != &other)
{
if (m_value != 0)
{
close_or_throw(m_value); // std::terminate on failure (due to noexcept)
if ( result == -1 ) {
CATCH_SYSTEM_ERROR( errno, std::generic_category() );
}
m_value = other.m_value;
return result;
}
static inline int dup2_or_throw( int sourceDescriptor,
int destinationDescriptor ) {
int result{ dup2( sourceDescriptor, destinationDescriptor ) };
if ( result == -1 ) {
CATCH_SYSTEM_ERROR( errno, std::generic_category() );
}
return result;
}
static inline int fileno_or_throw( std::FILE* file ) {
int result{ fileno( file ) };
if ( result == -1 ) {
CATCH_SYSTEM_ERROR( errno, std::generic_category() );
}
return result;
}
static inline void pipe_or_throw( int descriptors[2] ) {
# if defined( _MSC_VER )
constexpr int defaultPipeSize{ 0 };
int result{ _pipe( descriptors, defaultPipeSize, _O_TEXT ) };
# else
int result{ pipe( descriptors ) };
# endif
if ( result ) {
CATCH_SYSTEM_ERROR( errno, std::generic_category() );
}
}
static inline size_t
read_or_throw( int descriptor, void* buffer, size_t size ) {
# if defined( _MSC_VER )
int result{
_read( descriptor, buffer, static_cast<unsigned>( size ) ) };
# else
ssize_t result{ read( descriptor, buffer, size ) };
# endif
if ( result == -1 ) {
CATCH_SYSTEM_ERROR( errno, std::generic_category() );
}
return static_cast<size_t>( result );
}
static inline void fflush_or_throw( std::FILE* file ) {
if ( std::fflush( file ) ) {
CATCH_SYSTEM_ERROR( errno, std::generic_category() );
}
}
constexpr UniqueFileDescriptor::UniqueFileDescriptor() noexcept:
m_value{} {}
UniqueFileDescriptor::UniqueFileDescriptor( int value ) noexcept:
m_value{ value } {}
constexpr UniqueFileDescriptor::UniqueFileDescriptor(
UniqueFileDescriptor&& other ) noexcept:
m_value{ other.m_value } {
other.m_value = 0;
}
return *this;
}
UniqueFileDescriptor::~UniqueFileDescriptor() noexcept {
if ( m_value == 0 ) {
return;
}
constexpr int UniqueFileDescriptor::get() { return m_value; }
inline void create_pipe(UniqueFileDescriptor& readDescriptor, UniqueFileDescriptor& writeDescriptor)
{
readDescriptor = {};
writeDescriptor = {};
int descriptors[2];
pipe_or_throw(descriptors);
readDescriptor = UniqueFileDescriptor{ descriptors[0] };
writeDescriptor = UniqueFileDescriptor{ descriptors[1] };
}
inline void read_thread(UniqueFileDescriptor&& file, std::string& result)
{
std::string buffer{};
constexpr size_t bufferSize{ 4096 };
buffer.resize(bufferSize);
size_t sizeRead{};
while ((sizeRead = read_or_throw(file.get(), &buffer[0], bufferSize)) != 0)
{
result.append(buffer.data(), sizeRead);
close_or_throw(
m_value ); // std::terminate on failure (due to noexcept)
}
}
OutputFileRedirector::OutputFileRedirector(FILE* file, std::string& result) :
m_file{ file },
m_fd{ fileno_or_throw(m_file) },
m_previous{ dup_or_throw(m_fd) }
{
fflush_or_throw(m_file);
UniqueFileDescriptor&
UniqueFileDescriptor::operator=( UniqueFileDescriptor&& other ) noexcept {
std::swap( m_value, other.m_value );
return *this;
}
UniqueFileDescriptor readDescriptor{};
UniqueFileDescriptor writeDescriptor{};
create_pipe(readDescriptor, writeDescriptor);
constexpr int UniqueFileDescriptor::get() { return m_value; }
// Anonymous pipes have a limited buffer and require an active reader to ensure the writer does not become blocked.
// Use a separate thread to ensure the buffer does not get stuck full.
m_readThread = jthread{ [readDescriptor{ CATCH_MOVE(readDescriptor) }, &result] () mutable {
read_thread(CATCH_MOVE(readDescriptor), result); } };
static inline void create_pipe( UniqueFileDescriptor& readDescriptor,
UniqueFileDescriptor& writeDescriptor ) {
readDescriptor = {};
writeDescriptor = {};
dup2_or_throw(writeDescriptor.get(), m_fd);
}
int descriptors[2];
pipe_or_throw( descriptors );
OutputFileRedirector::~OutputFileRedirector() noexcept
{
fflush_or_throw(m_file); // std::terminate on failure (due to noexcept)
dup2_or_throw(m_previous.get(), m_fd); // std::terminate on failure (due to noexcept)
}
readDescriptor = UniqueFileDescriptor{ descriptors[0] };
writeDescriptor = UniqueFileDescriptor{ descriptors[1] };
}
OutputRedirect::OutputRedirect(std::string& output, std::string& error) :
m_output{ stdout, output }, m_error{ stderr, error } {}
static inline void read_thread( UniqueFileDescriptor&& file,
std::string& result ) {
std::string buffer{};
constexpr size_t bufferSize{ 4096 };
buffer.resize( bufferSize );
size_t sizeRead{};
while ( ( sizeRead = read_or_throw(
file.get(), &buffer[0], bufferSize ) ) != 0 ) {
result.append( buffer.data(), sizeRead );
}
}
OutputFileRedirector::OutputFileRedirector( FILE* file,
std::string& result ):
m_file{ file },
m_fd{ fileno_or_throw( m_file ) },
m_previous{ dup_or_throw( m_fd ) } {
fflush_or_throw( m_file );
UniqueFileDescriptor readDescriptor{};
UniqueFileDescriptor writeDescriptor{};
create_pipe( readDescriptor, writeDescriptor );
// Anonymous pipes have a limited buffer and require an active reader to
// ensure the writer does not become blocked. Use a separate thread to
// ensure the buffer does not get stuck full.
m_readThread =
std::thread{ [readDescriptor{ CATCH_MOVE( readDescriptor ) },
&result]() mutable {
read_thread( CATCH_MOVE( readDescriptor ), result );
} };
// Replace the stdout or stderr file descriptor with the write end of
// the pipe.
dup2_or_throw( writeDescriptor.get(), m_fd );
}
OutputFileRedirector::~OutputFileRedirector() noexcept {
if ( m_readThread.joinable() ) {
m_readThread.join();
}
fflush_or_throw(
m_file ); // std::terminate on failure (due to noexcept)
// Restore the original stdout or stderr file descriptor.
dup2_or_throw( m_previous.get(),
m_fd ); // std::terminate on failure (due to noexcept)
}
OutputRedirect::OutputRedirect( std::string& output, std::string& error ):
m_output{ stdout, output }, m_error{ stderr, error } {}
# else // !CATCH_INTERNAL_CONFIG_USE_ASYNC
# if defined( _MSC_VER )
TempFile::TempFile() {
if ( tmpnam_s( m_buffer ) ) {
CATCH_RUNTIME_ERROR( "Could not get a temp filename" );
}
if ( fopen_s( &m_file, m_buffer, "w+" ) ) {
char buffer[100];
if ( strerror_s( buffer, errno ) ) {
CATCH_RUNTIME_ERROR( "Could not translate errno to a string" );
}
CATCH_RUNTIME_ERROR( "Could not open the temp file: '"
<< m_buffer << "' because: " << buffer );
}
}
# else
TempFile::TempFile() {
m_file = std::tmpfile();
if ( !m_file ) {
CATCH_RUNTIME_ERROR( "Could not create a temp file." );
}
}
# endif
TempFile::~TempFile() {
// TBD: What to do about errors here?
std::fclose( m_file );
// We manually create the file on Windows only, on Linux
// it will be autodeleted
# if defined( _MSC_VER )
std::remove( m_buffer );
# endif
}
FILE* TempFile::getFile() { return m_file; }
std::string TempFile::getContents() {
std::stringstream sstr;
char buffer[100] = {};
std::rewind( m_file );
while ( std::fgets( buffer, sizeof( buffer ), m_file ) ) {
sstr << buffer;
}
return sstr.str();
}
OutputRedirect::OutputRedirect( std::string& stdout_dest,
std::string& stderr_dest ):
m_originalStdout( dup( 1 ) ),
m_originalStderr( dup( 2 ) ),
m_stdoutDest( stdout_dest ),
m_stderrDest( stderr_dest ) {
dup2( fileno( m_stdoutFile.getFile() ), 1 );
dup2( fileno( m_stderrFile.getFile() ), 2 );
}
OutputRedirect::~OutputRedirect() {
Catch::cout() << std::flush;
fflush( stdout );
// Since we support overriding these streams, we flush cerr
// even though std::cerr is unbuffered
Catch::cerr() << std::flush;
Catch::clog() << std::flush;
fflush( stderr );
dup2( m_originalStdout, 1 );
dup2( m_originalStderr, 2 );
m_stdoutDest += m_stdoutFile.getContents();
m_stderrDest += m_stderrFile.getContents();
}
# endif // CATCH_INTERNAL_CONFIG_USE_ASYNC
#endif // CATCH_CONFIG_NEW_CAPTURE
} // namespace Catch
#if defined(CATCH_CONFIG_NEW_CAPTURE)
#if defined(_MSC_VER)
#undef close
#undef dup
#undef dup2
#undef fileno
#endif
#if defined( CATCH_CONFIG_NEW_CAPTURE )
# if defined( _MSC_VER )
# undef close
# undef dup
# undef dup2
# undef fileno
# endif
#endif

157
src/catch2/internal/catch_output_redirect.hpp
View File

@ -8,16 +8,17 @@
#ifndef CATCH_OUTPUT_REDIRECT_HPP_INCLUDED
#define CATCH_OUTPUT_REDIRECT_HPP_INCLUDED
#include <catch2/internal/catch_compiler_capabilities.hpp>
#include <catch2/internal/catch_platform.hpp>
#include <catch2/internal/catch_reusable_string_stream.hpp>
#include <catch2/internal/catch_compiler_capabilities.hpp>
#include <cstdio>
#include <iosfwd>
#include <string>
#if defined(CATCH_CONFIG_NEW_CAPTURE)
#include <thread>
#if defined( CATCH_CONFIG_NEW_CAPTURE )
# if defined( CATCH_INTERNAL_CONFIG_USE_ASYNC )
# include <thread>
# endif
#endif
namespace Catch {
@ -28,13 +29,15 @@ namespace Catch {
std::streambuf* m_prevBuf;
public:
RedirectedStream( std::ostream& originalStream, std::ostream& redirectionStream );
RedirectedStream( std::ostream& originalStream,
std::ostream& redirectionStream );
~RedirectedStream();
};
class RedirectedStdOut {
ReusableStringStream m_rss;
RedirectedStream m_cout;
public:
RedirectedStdOut();
auto str() const -> std::string;
@ -47,6 +50,7 @@ namespace Catch {
ReusableStringStream m_rss;
RedirectedStream m_cerr;
RedirectedStream m_clog;
public:
RedirectedStdErr();
auto str() const -> std::string;
@ -54,13 +58,15 @@ namespace Catch {
class RedirectedStreams {
public:
RedirectedStreams(RedirectedStreams const&) = delete;
RedirectedStreams& operator=(RedirectedStreams const&) = delete;
RedirectedStreams(RedirectedStreams&&) = delete;
RedirectedStreams& operator=(RedirectedStreams&&) = delete;
RedirectedStreams( RedirectedStreams const& ) = delete;
RedirectedStreams& operator=( RedirectedStreams const& ) = delete;
RedirectedStreams( RedirectedStreams&& ) = delete;
RedirectedStreams& operator=( RedirectedStreams&& ) = delete;
RedirectedStreams(std::string& redirectedCout, std::string& redirectedCerr);
RedirectedStreams( std::string& redirectedCout,
std::string& redirectedCerr );
~RedirectedStreams();
private:
std::string& m_redirectedCout;
std::string& m_redirectedCerr;
@ -68,83 +74,102 @@ namespace Catch {
RedirectedStdErr m_redirectedStdErr;
};
#if defined(CATCH_CONFIG_NEW_CAPTURE)
#if defined( CATCH_CONFIG_NEW_CAPTURE )
#if defined(CATCH_CPP20_OR_GREATER)
using jthread = std::jthread;
#else
// Just enough of std::jthread from C++20 for the code below.
struct jthread final
{
jthread() noexcept;
# if defined( CATCH_INTERNAL_CONFIG_USE_ASYNC )
template <typename F, typename... Args>
jthread(F&& f, Args&&... args);
struct UniqueFileDescriptor final {
constexpr UniqueFileDescriptor() noexcept;
explicit UniqueFileDescriptor( int value ) noexcept;
jthread(jthread const&) = delete;
jthread(jthread&&) noexcept = default;
UniqueFileDescriptor( UniqueFileDescriptor const& ) = delete;
constexpr UniqueFileDescriptor( UniqueFileDescriptor&& other ) noexcept;
jthread& operator=(jthread const&) noexcept = delete;
~UniqueFileDescriptor() noexcept;
// Not exactly like std::jthread, but close enough for the code below.
jthread& operator=(jthread&&) noexcept = default;
UniqueFileDescriptor& operator=( UniqueFileDescriptor const& ) = delete;
UniqueFileDescriptor&
operator=( UniqueFileDescriptor&& other ) noexcept;
// Not exactly like std::jthread, but close enough for the code below.
~jthread() noexcept;
constexpr int get();
private:
std::thread m_thread;
};
#endif
private:
int m_value;
};
struct UniqueFileDescriptor final
{
constexpr UniqueFileDescriptor() noexcept;
explicit UniqueFileDescriptor(int value) noexcept;
struct OutputFileRedirector final {
explicit OutputFileRedirector( std::FILE* file, std::string& result );
UniqueFileDescriptor(UniqueFileDescriptor const&) = delete;
constexpr UniqueFileDescriptor(UniqueFileDescriptor&& other) noexcept;
OutputFileRedirector( OutputFileRedirector const& ) = delete;
OutputFileRedirector( OutputFileRedirector&& ) = delete;
~UniqueFileDescriptor() noexcept;
~OutputFileRedirector() noexcept;
UniqueFileDescriptor& operator=(UniqueFileDescriptor const&) = delete;
UniqueFileDescriptor& operator=(UniqueFileDescriptor&& other) noexcept;
OutputFileRedirector& operator=( OutputFileRedirector const& ) = delete;
OutputFileRedirector& operator=( OutputFileRedirector&& ) = delete;
constexpr int get();
private:
std::FILE* m_file;
int m_fd;
UniqueFileDescriptor m_previous;
std::thread m_readThread;
};
private:
int m_value;
};
struct OutputRedirect final {
OutputRedirect( std::string& output, std::string& error );
struct OutputFileRedirector final
{
explicit OutputFileRedirector(std::FILE* file, std::string& result);
private:
OutputFileRedirector m_output;
OutputFileRedirector m_error;
};
OutputFileRedirector(OutputFileRedirector const&) = delete;
OutputFileRedirector(OutputFileRedirector&&) = delete;
# else // !CATCH_INTERNAL_CONFIG_USE_ASYNC
~OutputFileRedirector() noexcept;
// Windows's implementation of std::tmpfile is terrible (it tries
// to create a file inside system folder, thus requiring elevated
// privileges for the binary), so we have to use tmpnam(_s) and
// create the file ourselves there.
class TempFile {
public:
TempFile( TempFile const& ) = delete;
TempFile& operator=( TempFile const& ) = delete;
TempFile( TempFile&& ) = delete;
TempFile& operator=( TempFile&& ) = delete;
OutputFileRedirector& operator=(OutputFileRedirector const&) = delete;
OutputFileRedirector& operator=(OutputFileRedirector&&) = delete;
TempFile();
~TempFile();
private:
std::FILE* m_file;
int m_fd;
UniqueFileDescriptor m_previous;
jthread m_readThread;
};
std::FILE* getFile();
std::string getContents();
struct OutputRedirect final
{
OutputRedirect(std::string& output, std::string& error);
private:
std::FILE* m_file = nullptr;
# if defined( _MSC_VER )
char m_buffer[L_tmpnam] = { 0 };
# endif
};
private:
OutputFileRedirector m_output;
OutputFileRedirector m_error;
};
class OutputRedirect {
public:
OutputRedirect( OutputRedirect const& ) = delete;
OutputRedirect& operator=( OutputRedirect const& ) = delete;
OutputRedirect( OutputRedirect&& ) = delete;
OutputRedirect& operator=( OutputRedirect&& ) = delete;
#endif
OutputRedirect( std::string& stdout_dest, std::string& stderr_dest );
~OutputRedirect();
private:
int m_originalStdout = -1;
int m_originalStderr = -1;
TempFile m_stdoutFile;
TempFile m_stderrFile;
std::string& m_stdoutDest;
std::string& m_stderrDest;
};
# endif // CATCH_INTERNAL_CONFIG_USE_ASYNC
#endif // CATCH_CONFIG_NEW_CAPTURE
} // end namespace Catch