def test_single():
# filesize, piece size pairs
pairs = [
(3, 20),
(20, 17),
(10000, 32),
(100, 20),
(1, 131072),
]
for pair in pairs:
pm = PieceManager(FileSet([('hello_world', pair[0])], pair[1]))
pm.initialize()
chunks = list(pm.iter_pieces())
hashes = list(pm.iter_hashes())
try:
assert len(chunks) == int(ceil(1.*pair[0]/pair[1]))
assert len(hashes) == int(ceil(1.*pair[0]/pair[1]))
for chunk in chunks[:-1]:
assert len(chunk) == pair[1]
_, leftover = divmod(pair[0], pair[1])
if leftover:
assert len(chunks[-1]) == leftover
for hash in hashes:
assert len(hash) == 20
finally:
pm.destroy()
def test_empty_input():
pm = PieceManager(FileSet((), 1))
pm.initialize()
chunks = list(pm.iter_pieces())
hashes = list(pm.iter_hashes())
try:
assert chunks == []
assert hashes == []
finally:
pm.destroy()
def test_many():
d1 = tempfile.mkdtemp()
d2 = tempfile.mkdtemp()
d3 = tempfile.mkdtemp()
deadbeef = struct.pack('>I', 0xDEADBEEF)
with open(os.path.join(d1, 'one.txt'), 'w') as fp:
for k in range(1):
fp.write(deadbeef)
with open(os.path.join(d1, 'two.txt'), 'w') as fp:
for k in range(2):
fp.write(deadbeef)
with open(os.path.join(d1, 'three.txt'), 'w') as fp:
for k in range(3):
fp.write(deadbeef)
with open(os.path.join(d2, 'two.txt'), 'w') as fp:
for k in range(2):
fp.write(deadbeef)
with open(os.path.join(d2, 'four.txt'), 'w') as fp:
for k in range(4):
fp.write(deadbeef)
with open(os.path.join(d3, 'six.txt'), 'w') as fp:
for k in range(6):
fp.write(deadbeef)
pm1 = PieceManager(
FileSet([('one.txt', 4), ('two.txt', 8), ('three.txt', 12)], piece_size=13),
chroot=d1)
pm2 = PieceManager(FileSet([('two.txt', 8), ('four.txt', 16)], piece_size=13), chroot=d2)
pm3 = PieceManager(FileSet([('six.txt', 24)], piece_size=13), chroot=d3)
pm1.initialize()
pm2.initialize()
pm3.initialize()
try:
assert list(pm1.iter_pieces()) == list(pm2.iter_pieces())
assert list(pm1.iter_pieces()) == list(pm3.iter_pieces())
assert list(pm1.iter_hashes()) == list(pm2.iter_hashes())
assert list(pm1.iter_hashes()) == list(pm3.iter_hashes())
finally:
pm1.destroy()
pm2.destroy()
pm3.destroy()