public function testShouldDecrementValue()
{
$cache = $this->getAdapter();
$this->tester->haveInAerospike('decrement', 100);
$this->assertEquals(99, $cache->decrement('decrement'));
$this->assertEquals(97, $cache->decrement('decrement', 2));
$this->assertEquals(87, $cache->decrement('decrement', 10));
$cache->delete('decrement');
}