public function it_can_sismember()
{
$this->client->sismember('test', 'test')->shouldBeCalled()->willReturn(true);
$this->sIsMember('test', 'test')->shouldReturn(true);
$this->client->sismember('test', 'test')->willThrow($this->predisException);
$this->shouldThrow(DriverException::class)->during('sIsMember', ['test', 'test']);
}