18F/identity-idp

import useSandbox from './use-sandbox';

describe('useSandbox', () => {
  const sandbox = useSandbox();

  const object = { fn: () => 0 };

  afterEach(() => {
    expect(object.fn()).to.equal(0);
  });

  it('cleans up after itself', () => {
    sandbox.stub(object, 'fn').callsFake(() => 1);

    expect(object.fn()).to.equal(1);
    // See `afterEach` for clean-up assertions
  });

  context('with fake timers', () => {
    const { clock } = useSandbox({ useFakeTimers: true });

    expect(clock.tick).to.be.a('function');

    it('supports invoking against a destructured clock', () => {
      clock.tick(0);
    });

    it('advances the clock', () => {
      const MAX_SAFE_32_BIT_INT = 2147483647;
      return new Promise((resolve) => {
        setTimeout(resolve, MAX_SAFE_32_BIT_INT);
        clock.tick(MAX_SAFE_32_BIT_INT);
      });
    });
  });
});