theatre/packages/dataverse/src/prism/iterateOver.test.ts

22 lines
558 B
TypeScript

/*
* @jest-environment jsdom
*/
import Atom from '../Atom'
import iterateOver from './iterateOver'
describe(`iterateOver()`, () => {
test('it should work', () => {
const a = new Atom(0)
let iter = iterateOver(a.pointer)
expect(iter.next().value).toEqual(0)
a.set(1)
a.set(2)
expect(iter.next()).toMatchObject({value: 2, done: false})
iter.return()
iter = iterateOver(a.pointer)
expect(iter.next().value).toEqual(2)
a.set(3)
expect(iter.next()).toMatchObject({done: false, value: 3})
iter.return()
})
})