public function testThatContainsReturnsTrueForCacheValueAndFalseForNotContainedKey()
{
$this->cache->save('1', true);
$this->cache->save('2', true);
$this->assertTrue($this->cache->contains('1'));
$this->assertTrue($this->cache->contains('2'));
$this->assertFalse($this->cache->contains('3'));
$this->cache->remove('1');
$this->cache->remove('2');
$this->assertFalse($this->cache->contains('1'));
$this->assertFalse($this->cache->contains('2'));
}