assertion_error.hpp

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// SPDX-FileCopyrightText: 2026 Klaus Reimer <k@ailis.de>
// SPDX-License-Identifier: MIT
 
#pragma once
 
#include <optional>
#include <source_location>
#include <stdexcept>
#include <string>
#include <string_view>
#include <utility>
 
namespace kaycxx::test {
 
class assertion_error : public std::logic_error {
public:
    explicit assertion_error(
        std::string const& message,
        std::string_view reason,
        std::string actual,
        std::string expected,
        std::optional<std::source_location> location = std::nullopt
    ) : std::logic_error{make_message(message, reason)},
        reason_{reason},
        actual_{std::move(actual)},
        expected_{std::move(expected)},
        location_{location}
    {}
 
    std::string const& reason() const noexcept {
        return reason_;
    }
 
    std::string const& actual() const noexcept {
        return actual_;
    }
 
    std::string const& expected() const noexcept {
        return expected_;
    }
 
    std::optional<std::source_location> const& location() const noexcept {
        return location_;
    }
 
private:
    static std::string make_message(std::string const& message, std::string_view reason) {
        if (reason.empty()) {
            return message;
        }
 
        auto result = message;
        result += ": ";
        result += reason;
        return result;
    }
 
    std::string reason_;
    std::string actual_;
    std::string expected_;
    std::optional<std::source_location> location_;
};
 
} // namespace kaycxx::test