recoil/cjs/util/__tests__/Recoil_deepFreezeValue-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 deepFreezeValue = require('../Recoil_deepFreezeValue');

describe('deepFreezeValue', () => {
  test('Do not freeze Promises', () => {
    const obj = {
      test: new Promise(() => {})
    };
    deepFreezeValue(obj);
    expect(Object.isFrozen(obj)).toBe(true);
    expect(Object.isFrozen(obj.test)).toBe(false);
  });
  test('Do not freeze Errors', () => {
    const obj = {
      test: new Error()
    };
    deepFreezeValue(obj);
    expect(Object.isFrozen(obj)).toBe(true);
    expect(Object.isFrozen(obj.test)).toBe(false);
  });
  test('check no error: object with ArrayBufferView property', () => {
    expect(() => deepFreezeValue({
      test: new Int8Array(4)
    })).not.toThrow();
    expect(() => deepFreezeValue({
      test: new Uint8Array(4)
    })).not.toThrow();
    expect(() => deepFreezeValue({
      test: new Uint8ClampedArray(4)
    })).not.toThrow();
    expect(() => deepFreezeValue({
      test: new Uint16Array(4)
    })).not.toThrow();
    expect(() => deepFreezeValue({
      test: new Int32Array(4)
    })).not.toThrow();
    expect(() => deepFreezeValue({
      test: new Uint32Array(4)
    })).not.toThrow();
    expect(() => deepFreezeValue({
      test: new Float32Array(4)
    })).not.toThrow();
    expect(() => deepFreezeValue({
      test: new Float64Array(4)
    })).not.toThrow();
    expect(() => deepFreezeValue({
      test: new DataView(new ArrayBuffer(16), 0)
    })).not.toThrow();
  });
  test('check no error: object with Window property', () => {
    if (typeof window === 'undefined') {
      return;
    }

    expect(() => deepFreezeValue({
      test: window
    })).not.toThrow();
  }); // TODO add test of other pattern
});