ow/source/lib/predicates/date.ts

import {Predicate, Context} from './predicate';

export class DatePredicate extends Predicate<Date> {
	constructor(context?: Context) {
		super('date', context);
	}

	/**
	 * Test a date to be before another date.
	 *
	 * @param date Maximum value.
	 */
	before(date: Date) {
		return this.addValidator({
			message: value => `Expected ${value.toISOString()} to be before ${date.toISOString()}`,
			validator: value => value.getTime() < date.getTime()
		});
	}

	/**
	 * Test a date to be before another date.
	 *
	 * @param date Minimum value.
	 */
	after(date: Date) {
		return this.addValidator({
			message: value => `Expected ${value.toISOString()} to be after ${date.toISOString()}`,
			validator: value => value.getTime() > date.getTime()
		});
	}
}