import t from 'tcomb';
import { property, createInstance } from 'tcomb-property';

const Show = t.struct({
  title: t.String,
  duration: property(t.String, '40m'),
  network: t.struct({
    country: property(t.String, 'USA')
  })
});

createInstance(Show)
/*
{
  title: undefined,
  duration: '40m',
  network: {
    country: 'USA'
  }
}
*/

createInstance(Show, { title: 'Top Gear', duration: '20m', network: { country: 'UK' } })
/*
{
  title: 'Top Gear',
  duration: '20m',
  network: {
    country: 'UK'
  }
}
*/