vega-frontend-monorepo/libs/web3/__mocks__/zustand.js

import { act } from 'react-dom/test-utils';
const actualCreate = jest.requireActual('zustand').default; // if using jest

// a variable to hold reset functions for all stores declared in the app
const storeResetFns = new Set();

// when creating a store, we get its initial state, create a reset function and add it in the set
const create = (createState) => {
  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()));
});

export default create;