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']); }