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

Recoil - A state management library for React

/**
 * Copyright (c) Facebook, Inc. and its affiliates.
 *
 * This source code is licensed under the MIT license found in the
 * LICENSE file in the root directory of this source tree.
 *
 * @emails oncall+recoil
 * @flow strict-local
 * @format
 */
'use strict';

const cacheWithValueEquality = require('../Recoil_cacheWithValueEquality');

const {
  List
} = require('immutable');

test('cacheWithValueEquality - set string', () => {
  const cache = cacheWithValueEquality();
  expect(cache.get('a')).toBe(undefined);
  cache.set('a', 1);
  expect(cache.get('a')).toBe(1);
  expect(cache.get('b')).toBe(undefined);
  cache.set('b', 2);
  expect(cache.get('a')).toBe(1);
  expect(cache.get('b')).toBe(2);
});
test('cacheWithValueEquality - set object', () => {
  const cache = cacheWithValueEquality();
  expect(cache.get({
    foo: 'a'
  })).toBe(undefined);
  cache.set({
    foo: 'a'
  }, 1);
  expect(cache.get({
    foo: 'a'
  })).toBe(1); // Override with a new instance of an object with value equality

  cache.set({
    foo: 'a'
  }, 2);
  expect(cache.get({
    foo: 'a'
  })).toBe(2);
});
test('cacheWithValueEquality - Immutable List', () => {
  const cache = cacheWithValueEquality();
  expect(cache.get({
    foo: List(['a'])
  })).toBe(undefined);
  cache.set({
    foo: List(['a'])
  }, 1);
  expect(cache.get({
    foo: List(['a'])
  })).toBe(1); // Override with a new instance of an object with value equality

  cache.set({
    foo: List(['a'])
  }, 2);
  expect(cache.get({
    foo: List(['a'])
  })).toBe(2); // Ensure that we have value equality for immutable objects that may
  // have internal metadata that is different (e.g. __ownerID, __hash, etc.)

  cache.set({
    foo: List(['a']).asMutable()
  }, 3);
  expect(cache.get({
    foo: List(['a'])
  })).toBe(3);
});