public function testFormat()
{
$unit = new TimeUnit(TimeUnit::SECONDS, TimeUnit::MINUTES, TimeUnit::MODE_THROUGHPUT);
$result = $unit->format(30);
$this->assertEquals('2.000ops/m', $result);
$result = $unit->format(1800, TimeUnit::HOURS, TimeUnit::MODE_TIME);
$this->assertEquals('0.500h', $result);
$result = $unit->format(1800, TimeUnit::HOURS, TimeUnit::MODE_TIME, 7);
$this->assertEquals('0.5000000h', $result);
}