/** File store properties examined */
@Test
public void testRetrieveFileStoreInforamtion() throws IOException {
FileSystem fs = FileSystems.getDefault();
assertNotNull(fs);
List<FileStore> stores = iterableToList(fs.getFileStores());
// file store is device such a drive, partition or volume
// in my system I have 3 partitions
assertEquals(3, stores.size());
// for storing triples of basic file store identification
Set<String> storeNames = new HashSet<>();
for (FileStore store : stores) {
storeNames.add(store.name() + ";" + store.type() + ";" + store.isReadOnly());
long total = store.getTotalSpace();
long unallocated = store.getUnallocatedSpace();
long usable = store.getUsableSpace();
assertTrue(total > 0);
assertTrue(unallocated > 0 && total >= unallocated);
assertTrue(usable > 0 && total >= usable);
// Just for notice of NumberFormat class existence :)
// System.out.println(NumberFormat.getInstance().format(total));
}
// environment dependent
assertEquals(
cSET("Windows7_OS;NTFS;false", "Data;NTFS;false", "Documents;NTFS;false"), storeNames);
// can be used for determine if file store supports such attribute view
assertTrue(stores.get(0).supportsFileAttributeView(BasicFileAttributeView.class));
assertFalse(stores.get(0).supportsFileAttributeView(PosixFileAttributeView.class));
}
public static void main(String[] args) throws IOException {
System.out.format("%-20s %12s %12s %12s\n", "Filesystem", "kbytes", "used", "avail");
if (args.length == 0) {
FileSystem fs = FileSystems.getDefault();
for (FileStore store : fs.getFileStores()) {
printFileStore(store);
}
} else {
for (String file : args) {
FileStore store = Files.getFileStore(Paths.get(file));
printFileStore(store);
}
}
}