// TODO: Re-enable this section check for once https://github.com/RubenVerborgh/AsyncIterator/pull/45
        // is merged in order to check that destruction occurs immediately rather than over several ticks
        // it('should destroy when closed before being read after map', async () => {
        //   iterator.map(x => x).close();
        //   // TODO: Re-enable this same-tick check once https://github.com/RubenVerborgh/AsyncIterator/pull/45
        //   // is merged
        //   // iterator.destroyed.should.be.true;

        //   // Wait a tick
        //   await Promise.resolve();
        //   iterator.destroyed.should.be.true;
        //   console.log('b', iterator._state, iterator.open, iterator.closed, iterator.ended, iterator.destroyed)
        // });

        // it('should destroy when closed before being read after map then filter', async () => {
        //   const iter = iterator.map(x => x);
        //   iter.filter(x => true).close();

        //   // TODO: Re-enable this same-tick check once https://github.com/RubenVerborgh/AsyncIterator/pull/45
        //   // is merged
        //   // iterator.destroyed.should.be.true;
        //   // it.destroyed.should.be.true;

        //   // Wait a tick
        //   await Promise.resolve();
        //   iterator.destroyed.should.be.true;
        //   iter.destroyed.should.be.true;
        // });