recoil/cjs/caches/__tests__/Recoil_MapCache-test.js.flow

Recoil - A state management library for React

/**
 * (c) Facebook, Inc. and its affiliates. Confidential and proprietary.
 *
 * @emails oncall+recoil
 * @flow strict-local
 * @format
 */
'use strict';

const {
  getRecoilTestFn
} = require('../../__test_utils__/Recoil_TestingUtils');

let MapCache;
const testRecoil = getRecoilTestFn(() => {
  ({
    MapCache
  } = require('../Recoil_MapCache'));
});
describe('MapCache', () => {
  testRecoil('setting and getting', () => {
    const cache = new MapCache<string, number>();
    cache.set('a', 1);
    cache.set('b', 2);
    cache.set('c', 3);
    expect(cache.size()).toBe(3);
    expect(cache.get('a')).toBe(1);
    expect(cache.get('b')).toBe(2);
    expect(cache.get('c')).toBe(3);
  });
  testRecoil('deleting', () => {
    const cache = new MapCache<string, number>();
    cache.set('a', 1);
    cache.set('b', 2);
    cache.set('c', 3);
    expect(cache.size()).toBe(3);
    cache.delete('a');
    expect(cache.size()).toBe(2);
    expect(cache.get('a')).toBe(undefined);
    expect(cache.get('b')).toBe(2);
    expect(cache.has('a')).toBe(false);
  });
});