Skip to main content
Using Deno in production at your company? Earn free Deno merch.
Give us feedback
Module

x/jotai/tests/vanilla/basic.test.tsx

👻 Primitive and flexible state management for React
Latest
File
import { expect, it } from 'vitest'import { atom } from 'jotai/vanilla'
it('creates atoms', () => { // primitive atom const countAtom = atom(0) const anotherCountAtom = atom(1) // read-only derived atom const doubledCountAtom = atom((get) => get(countAtom) * 2) // read-write derived atom const sumCountAtom = atom( (get) => get(countAtom) + get(anotherCountAtom), (get, set, value: number) => { set(countAtom, get(countAtom) + value / 2) set(anotherCountAtom, get(anotherCountAtom) + value / 2) }, ) // write-only derived atom const decrementCountAtom = atom(null, (get, set) => { set(countAtom, get(countAtom) - 1) }) expect({ countAtom, doubledCountAtom, sumCountAtom, decrementCountAtom, }).toMatchInlineSnapshot(` { "countAtom": { "init": 0, "read": [Function], "toString": [Function], "write": [Function], }, "decrementCountAtom": { "init": null, "read": [Function], "toString": [Function], "write": [Function], }, "doubledCountAtom": { "read": [Function], "toString": [Function], }, "sumCountAtom": { "read": [Function], "toString": [Function], "write": [Function], }, } `)})
it('should let users mark atoms as private', () => { const internalAtom = atom(0) internalAtom.debugPrivate = true
expect(internalAtom).toMatchInlineSnapshot(` { "debugPrivate": true, "init": 0, "read": [Function], "toString": [Function], "write": [Function], } `)})