public function testRetryDelay()
{
$driver = $this->getRedisDriver();
$driver->setRetryDelayCoefficient(1.5);
$driver->setInitialRetryDelay(200);
// 1 iteration
$delay = $driver->calculateRetryDelay(0);
$this->assertEquals(0, $delay);
// 2 iteration (300 ms)
$delay = $driver->calculateRetryDelay(1);
$this->assertEquals(300000, $delay);
// 3 iteration (600 ms)
$delay = $driver->calculateRetryDelay(2);
$this->assertEquals(600000, $delay);
}