fix(core): update atom value with conditional dependencies (regression with #2363)

tests/vanilla/dependency.test.tsx

@@ -153,3 +153,40 @@ it('keeps atoms mounted between recalculations', async () => {
  unmounted: 0,
  })
 })
+
+it.skipIf(!import.meta.env?.USE_STORE2)(
+ 'should not provide stale values to conditional dependents',
+ () => {
+ const dataAtom = atom<number[]>([])
+ const hasFilterAtom = atom(false)
+ const filteredAtom = atom((get) => {
+ const data = get(dataAtom)
+ const hasFilter = get(hasFilterAtom)
+ if (hasFilter) {
+ return []
+ } else {
+ return data
+ }
+ })
+ const stageAtom = atom((get) => {
+ const hasFilter = get(hasFilterAtom)
+ if (hasFilter) {
+ const filtered = get(filteredAtom)
+ return filtered.length === 0 ? 'is-empty' : 'has-data'
+ } else {
+ return 'no-filter'
+ }
+ })
+
+ const store = createStore()
+ store.sub(filteredAtom, () => undefined)
+ store.sub(stageAtom, () => undefined)
+
+ store.set(dataAtom, [100])
+ expect(store.get(stageAtom), 'should start without filter').to.equal(
+ 'no-filter',
+ )
+ store.set(hasFilterAtom, true)
+ expect(store.get(stageAtom), 'should update').to.equal('is-empty')
+ },
+)