where

where > Where

Validates value against expectation function.

Returns: true if expectation function is truthful for value, else throws.

import { expect } from 'chai';

import { validate, ValidationError, PropTypes } from '../../../src/index';

function validateFoo(value: string): boolean {

if (value !== 'foo') {

throw new ValidationError('my-error');

}

return true;

}

validate('foo', PropTypes.where(validateFoo));

expect(() => {

validate('bar', PropTypes.where(validateFoo));

}).to.throw(ValidationError);