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// Copyright (c) 2026 Progmasoft.
// SPDX-License-Identifier: MPL-2.0 WITH AdditionRef-Progmasoft-Exception-1.1
#pragma once
#include "Json.hpp"
#include "Process.hpp"
#include <mutex>
#include <optional>
#include <string>
namespace Progmasoft::Catch3::Runner
{
/// The runner and its workers exchange one JSON object per line. Every
/// object has a member "t" naming its kind.
///
/// From the runner to a worker:
/// run {index, attempt, temp} run one test
/// quit {} end the process
///
/// From a worker to the runner:
/// hello {pid, identity, tests, protocol}
/// start {index, attempt}
/// section {begin: true, name, file, line, depth, at}
/// section {begin: false, depth, at, duration}
/// at {location} the last assertion started
/// assertion {an AssertionRecord}
/// benchmark {a BenchmarkRecord}
/// fatal {message, location} sent before the worker dies
/// end {index, attempt, outcome, category, passed, failed,
/// duration, stdout, stderr}
inline constexpr int kWorkerProtocolVersion = 1;
/// Reads lines from a pipe.
class LineReader final
{
public:
explicit LineReader(PipeReader &pipe)
: pipe_{pipe}
{
}
/// The next line without its end, or nothing at the end of the
/// stream.
[[nodiscard]] std::optional<std::string>
Next();
private:
PipeReader &pipe_;
std::string buffer_;
std::size_t scanned_ = 0;
bool ended_ = false;
};
/// Writes messages to a pipe, one line each; safe from several
/// threads, since a test may assert from threads of its own.
class MessageWriter final
{
public:
explicit MessageWriter(PipeWriter &pipe)
: pipe_{pipe}
{
}
Status
Send(const JsonValue &message);
private:
PipeWriter &pipe_;
std::mutex mutex_;
};
/// A message of kind `kind` with no other members yet.
[[nodiscard]] JsonValue
Message(std::string_view kind);
} // namespace Progmasoft::Catch3::Runner
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