import type { StateCreator } from 'zustand'; import { act } from 'react-dom/test-utils'; const { create: actualCreate } = jest.requireActual('zustand'); // if using jest // a variable to hold reset functions for all stores declared in the app const storeResetFns = new Set<() => void>(); // when creating a store, we get its initial state, create a reset function and add it in the set export const create = () => (createState: StateCreator) => { const store = actualCreate(createState); const initialState = store.getState(); storeResetFns.add(() => store.setState(initialState, true)); return store; }; // Reset all stores after each test run beforeEach(() => { act(() => storeResetFns.forEach((resetFn) => resetFn())); });