@thaumaturgy/io-ts


Thaumaturgy is a fixtures and seeding library for TypeScript.

This package contains bindings for io-ts.

Installation

Install @thaumaturgy/io-ts as a development dependency:

``sh
npm install -D @thaumaturgy/io-ts
`

> Note: @thaumaturgy/io-ts has peer dependencies on io-ts and fp-ts.

Usage

`ts
import * as t from 'io-ts';
import { Realm } from '@thaumaturgy/io-ts';

const Movie = t.strict(
{
title: t.string,
year: t.number,
},
'Movie'
);

const realm = new Realm();

realm.define(Movie, {
sequences: {
titles: new Sequence(n => Movie ${n} as const),
years: new Sequence(n => 2022 - n),
},
manifest: ({ sequences }) => ({
title: sequences.titles.next(),
year: sequences.years.next(),
}),
});

const movie = realm.manifest(Movie);

console.log(movie);
// > { title: 'Movie 1', year: 2021 }
`

$3

`ts
import * as t from 'io-ts';
import { Realm, Ref } from '@thaumaturgy/io-ts';

const Author = t.type(
{
id: t.string,
name: t.string,
},
'Author'
);

const Book = t.type(
{
id: t.string,
authorId: t.string,
title: t.string,
},
'Book'
);

const realm = new Realm();

realm.define(Author, {
manifest: ({ uuid }) => ({
id: uuid(),
name: 'J. R. R. Tolkien',
}),
});

realm.define(Book, {
manifest: ({ uuid }) => ({
id: uuid(),
authorId: Ref.to(Author).through(author => author.id),
title: 'The Lord of the Rings',
}),
});

const book = realm.manifest(Book);

console.log(book);
// > {
// id: '1ab4790a-9911-4e20-9006-b12e6b60dfe6',
// authorId: 'c6a1f6e0-6845-4675-b570-87024446a371',
// title: 'The Lord of the Rings'
// }
``