// Copyright 2026 The Chromium Authors
// Use of this source code is governed by a BSD-style license that can be
// found in the LICENSE file.

#ifndef COMPONENTS_SYNC_TEST_UNKNOWN_FIELD_UTIL_H_
#define COMPONENTS_SYNC_TEST_UNKNOWN_FIELD_UTIL_H_

#include <string>
#include <utility>

#include "testing/gmock/include/gmock/gmock.h"
#include "third_party/protobuf/src/google/protobuf/message_lite.h"

namespace syncer::test {

// Adds an unknown field to the given `proto` and returns the result proto.
void AddUnknownFieldToProto(::google::protobuf::MessageLite& proto,
                            std::string unknown_field_value);

// Adds an unknown enum field to the given `proto`.
void AddUnknownEnumFieldToProto(::google::protobuf::MessageLite& proto,
                                int field_number,
                                int value);

// Returns the unknown field value from the given `proto`.
std::string GetUnknownFieldValueFromProto(
    const ::google::protobuf::MessageLite& proto);

// Returns the unknown enum field value from the given `proto` for the given
// `field_number`, or -1 if not found.
int GetUnknownEnumFieldValueFromProto(
    const ::google::protobuf::MessageLite& proto,
    int field_number);

// Matcher helpers for tests.
MATCHER_P(HasUnknownField, unknown_field_value, "") {
  return GetUnknownFieldValueFromProto(arg) == unknown_field_value;
}

}  // namespace syncer::test

#endif  // COMPONENTS_SYNC_TEST_UNKNOWN_FIELD_UTIL_H_