PriceCalculator { static double getDiskPrice(long fileHdfsBytesReadWriteMb) { double totalFileReadWriteGb = fileHdfsBytesReadWriteMb / 1024; return totalFileReadWriteGb * DISK_PER_GB_PER_YEAR_EURO; }    }
@Test public void canGetDiskPrice() throws Exception { assertEquals(11.2, PriceCalculator.getDiskPrice(1024000L), 1.0e-2); }