Sokil\Mongo\CacheTest::testSetDueDate_ExistedKey PHP Method

    public function testSetDueDate_ExistedKey()
    {
        $this->cache->setDueDate('php', 'Old Value', time() + 100);
        $this->assertEquals('Old Value', $this->cache->get('php'));
        $this->cache->setDueDate('php', 'PHP: Hypertext Processor', time() + 1);
        $this->assertEquals('PHP: Hypertext Processor', $this->cache->get('php'));
        usleep(2000000);
        $this->assertEmpty($this->cache->get('php'));
    }