Function longString

dash/dash-renderer/tests/persistence.test.js:4–10

import {afterEach, beforeEach, describe, it} from 'mocha';
import {recordUiEdit, stores, storePrefix} from '../src/persistence';
const longString = pow => {
    let s = 's';
    for (let i = 0; i < pow; i++) {
        s += s;
    }
    return s;
};

const fillStorage = (store, key) => {
    // double the attempted string until we fail