How to use the http-status-codes.METHOD_NOT_ALLOWED function in http-status-codes

.then(function(res) {
                    expect(res).to.have.status(HttpStatus.METHOD_NOT_ALLOWED);
                });
        });

.then(function(res) {
                    expect(res).to.have.status(HttpStatus.METHOD_NOT_ALLOWED);
                });
        });

.then(function(res) {
                    expect(res).to.have.status(HttpStatus.METHOD_NOT_ALLOWED);
                });
        });

status: HttpStatus.BAD_REQUEST,
    code: "BAD_ARTICLE_UPDATEE",
    message: "title, topicId, change_log and content are required"
  },
  NO_ACCESS: {
    status: HttpStatus.FORBIDDEN,
    code: "NO_ACCESS",
    message: "You are not authorized to perform this action"
  },
  NOT_FOUND: {
    status: HttpStatus.NOT_FOUND,
    code: "NOT_FOUND",
    message: "Resource was not found"
  },
  DELETE_DEFAULT_TOPIC: {
    status: HttpStatus.METHOD_NOT_ALLOWED,
    code: "DELETE_DEFAULT_TOPIC",
    message: "Can not delete default topic!"
  },
  DELETE_DEFAULT_ADMIN: {
    status: HttpStatus.METHOD_NOT_ALLOWED,
    code: "DELETE_DEFAULT_ADMIN",
    message: "Can not delete admin user!"
  }
};

module.exports = {
  SALT_ROUNDS,
  ADMIN_ID,
  TOKEN_EXPIRATION,
  DEFAULT_CHANGELOG_MESSAGE,
  ROLES,

export function methodNotAllowed(req, res) {
  res.status(HttpStatus.METHOD_NOT_ALLOWED).json({
    error: {
      code: HttpStatus.METHOD_NOT_ALLOWED,
      message: HttpStatus.getStatusText(HttpStatus.METHOD_NOT_ALLOWED)
    }
  });
}

const HttpStatus = require('http-status-codes');
const status = HttpStatus.METHOD_NOT_ALLOWED;

class MethodNotAllowed extends Error {
    constructor() {
        super(HttpStatus.getStatusText(status));
        this.status = status;
    }
}

module.exports = MethodNotAllowed;

export function methodNotAllowed(req, res) {
    res.status(HttpStatus.METHOD_NOT_ALLOWED).json({
        error: {
            code: HttpStatus.METHOD_NOT_ALLOWED,
            message: HttpStatus.getStatusText(HttpStatus.METHOD_NOT_ALLOWED)
        }
    });
}

export function methodNotAllowed(req, res) {
    res.status(HttpStatus.METHOD_NOT_ALLOWED).json({
        error: {
            code: HttpStatus.METHOD_NOT_ALLOWED,
            message: HttpStatus.getStatusText(HttpStatus.METHOD_NOT_ALLOWED)
        }
    });
}

status: HttpStatus.FORBIDDEN,
    code: "NO_ACCESS",
    message: "You are not authorized to perform this action"
  },
  NOT_FOUND: {
    status: HttpStatus.NOT_FOUND,
    code: "NOT_FOUND",
    message: "Resource was not found"
  },
  DELETE_DEFAULT_TOPIC: {
    status: HttpStatus.METHOD_NOT_ALLOWED,
    code: "DELETE_DEFAULT_TOPIC",
    message: "Can not delete default topic!"
  },
  DELETE_DEFAULT_ADMIN: {
    status: HttpStatus.METHOD_NOT_ALLOWED,
    code: "DELETE_DEFAULT_ADMIN",
    message: "Can not delete admin user!"
  }
};

module.exports = {
  SALT_ROUNDS,
  ADMIN_ID,
  TOKEN_EXPIRATION,
  DEFAULT_CHANGELOG_MESSAGE,
  ROLES,
  ARTICLE_HISTORY_TYPES,
  ERRORS
};

export function methodNotAllowed(arg1: T | string | Wrapper, arg2?: string): T {
    return answer(HTTP.METHOD_NOT_ALLOWED, arg1, arg2);
}