def testExtendedMinSize(self):
with sparsetmpfile("extendedtest", Size("10 MiB")) as disk_file:
disk = DiskFile(disk_file)
disk.format = getFormat("disklabel", device=disk.path)
grain_size = Size(disk.format.alignment.grainSize)
sector_size = Size(disk.format.partedDevice.sectorSize)
extended_start = int(grain_size)
extended_end = extended_start + int(Size("6 MiB") / sector_size)
disk.format.addPartition(extended_start, extended_end, parted.PARTITION_EXTENDED)
extended = disk.format.extendedPartition
self.assertNotEqual(extended, None)
extended_device = PartitionDevice(os.path.basename(extended.path))
extended_device.disk = disk
extended_device.exists = True
extended_device.partedPartition = extended
# no logical partitions --> min size should be max of 1 KiB and grainSize
self.assertEqual(extended_device.minSize,
extended_device.alignTargetSize(max(grain_size, Size("1 KiB"))))
logical_start = extended_start + 1
logical_end = extended_end // 2
disk.format.addPartition(logical_start, logical_end, parted.PARTITION_LOGICAL)
logical = disk.format.partedDisk.getPartitionBySector(logical_start)
self.assertNotEqual(logical, None)
logical_device = PartitionDevice(os.path.basename(logical.path))
logical_device.disk = disk
logical_device.exists = True
logical_device.partedPartition = logical
# logical partition present --> min size should be based on its end sector
end_free = (extended_end - logical_end)*sector_size
self.assertEqual(extended_device.minSize,
extended_device.alignTargetSize(extended_device.currentSize - end_free))
