DefinitelyTyped/types/business-rules-engine/business-rules-engine-tests.ts

import * as Validators from 'business-rules-engine/node-validators';
import Validation = require("business-rules-engine");

export interface IPerson{
    Checked:boolean;
    FirstName:string;
    LastName:string;
    Email:string;
}


//create custom composite validator
var personValidator = new Validation.AbstractValidator<IPerson>();

//create field validators
var required = new Validators.RequiredValidator();
var email = new Validators.EmailValidator();
var maxLength = new Validators.MaxLengthValidator();
maxLength.MaxLength = 15;


personValidator.RuleFor("FirstName", required);
personValidator.RuleFor("FirstName", maxLength);

personValidator.RuleFor("LastName", required);
personValidator.RuleFor("LastName", maxLength);

personValidator.RuleFor("Email", required);
personValidator.RuleFor("Email", email);