public function testClear() {
		$result = $this->_redis->set('key', 'value');
		$this->assertTrue($result);

		$result = $this->_redis->set('another_key', 'value');
		$this->assertTrue($result);

		$result = $this->redis->clear();
		$this->assertTrue($result);

		$this->assertFalse($this->_redis->get('key'));
		$this->assertFalse($this->_redis->get('another_key'));
	}