-from bup import hashsplit, _helpers
+
+from __future__ import absolute_import
+from io import BytesIO
+
from wvtest import *
+from bup import hashsplit, _helpers, helpers
+from bup.compat import byte_int, bytes_from_uint
+from buptest import no_lingering_errors
+
+
+def nr_regions(x, max_count=None):
+ return list(hashsplit._nonresident_page_regions(bytearray(x), 1, max_count))
+
+
+@wvtest
+def test_nonresident_page_regions():
+ with no_lingering_errors():
+ WVPASSEQ(nr_regions([]), [])
+ WVPASSEQ(nr_regions([1]), [])
+ WVPASSEQ(nr_regions([0]), [(0, 1)])
+ WVPASSEQ(nr_regions([1, 0]), [(1, 1)])
+ WVPASSEQ(nr_regions([0, 0]), [(0, 2)])
+ WVPASSEQ(nr_regions([1, 0, 1]), [(1, 1)])
+ WVPASSEQ(nr_regions([1, 0, 0]), [(1, 2)])
+ WVPASSEQ(nr_regions([0, 1, 0]), [(0, 1), (2, 1)])
+ WVPASSEQ(nr_regions([0, 0, 1, 1, 1, 0, 0, 0, 1, 0, 0]),
+ [(0, 2), (5, 3), (9, 2)])
+ WVPASSEQ(nr_regions([2, 42, 3, 101]), [(0, 2)])
+ # Test limit
+ WVPASSEQ(nr_regions([0, 0, 0], None), [(0, 3)])
+ WVPASSEQ(nr_regions([0, 0, 0], 1), [(0, 1), (1, 1), (2, 1)])
+ WVPASSEQ(nr_regions([0, 0, 0], 2), [(0, 2), (2, 1)])
+ WVPASSEQ(nr_regions([0, 0, 0], 3), [(0, 3)])
+ WVPASSEQ(nr_regions([0, 0, 0], 4), [(0, 3)])
+ WVPASSEQ(nr_regions([0, 0, 1], None), [(0, 2)])
+ WVPASSEQ(nr_regions([0, 0, 1], 1), [(0, 1), (1, 1)])
+ WVPASSEQ(nr_regions([0, 0, 1], 2), [(0, 2)])
+ WVPASSEQ(nr_regions([0, 0, 1], 3), [(0, 2)])
+ WVPASSEQ(nr_regions([1, 0, 0], None), [(1, 2)])
+ WVPASSEQ(nr_regions([1, 0, 0], 1), [(1, 1), (2, 1)])
+ WVPASSEQ(nr_regions([1, 0, 0], 2), [(1, 2)])
+ WVPASSEQ(nr_regions([1, 0, 0], 3), [(1, 2)])
+ WVPASSEQ(nr_regions([1, 0, 0, 0, 1], None), [(1, 3)])
+ WVPASSEQ(nr_regions([1, 0, 0, 0, 1], 1), [(1, 1), (2, 1), (3, 1)])
+ WVPASSEQ(nr_regions([1, 0, 0, 0, 1], 2), [(1, 2), (3, 1)])
+ WVPASSEQ(nr_regions([1, 0, 0, 0, 1], 3), [(1, 3)])
+ WVPASSEQ(nr_regions([1, 0, 0, 0, 1], 4), [(1, 3)])
+
+
+@wvtest
+def test_uncache_ours_upto():
+ history = []
+ def mock_fadvise_pages_done(f, ofs, len):
+ history.append((f, ofs, len))
+
+ with no_lingering_errors():
+ uncache_upto = hashsplit._uncache_ours_upto
+ page_size = helpers.sc_page_size
+ orig_pages_done = hashsplit._fadvise_pages_done
+ try:
+ hashsplit._fadvise_pages_done = mock_fadvise_pages_done
+ history = []
+ uncache_upto(42, 0, (0, 1), iter([]))
+ WVPASSEQ([], history)
+ uncache_upto(42, page_size, (0, 1), iter([]))
+ WVPASSEQ([(42, 0, 1)], history)
+ history = []
+ uncache_upto(42, page_size, (0, 3), iter([(5, 2)]))
+ WVPASSEQ([], history)
+ uncache_upto(42, 2 * page_size, (0, 3), iter([(5, 2)]))
+ WVPASSEQ([], history)
+ uncache_upto(42, 3 * page_size, (0, 3), iter([(5, 2)]))
+ WVPASSEQ([(42, 0, 3)], history)
+ history = []
+ uncache_upto(42, 5 * page_size, (0, 3), iter([(5, 2)]))
+ WVPASSEQ([(42, 0, 3)], history)
+ history = []
+ uncache_upto(42, 6 * page_size, (0, 3), iter([(5, 2)]))
+ WVPASSEQ([(42, 0, 3)], history)
+ history = []
+ uncache_upto(42, 7 * page_size, (0, 3), iter([(5, 2)]))
+ WVPASSEQ([(42, 0, 3), (42, 5, 2)], history)
+ finally:
+ hashsplit._fadvise_pages_done = orig_pages_done
+
+
@wvtest
def test_rolling_sums():
- WVPASS(_helpers.selftest())
+ with no_lingering_errors():
+ WVPASS(_helpers.selftest())
+
+@wvtest
+def test_fanout_behaviour():
+
+ # Drop in replacement for bupsplit, but splitting if the int value of a
+ # byte >= BUP_BLOBBITS
+ basebits = _helpers.blobbits()
+ def splitbuf(buf):
+ ofs = 0
+ for b in buf:
+ b = byte_int(b)
+ ofs += 1
+ if b >= basebits:
+ return ofs, b
+ return 0, 0
+
+ with no_lingering_errors():
+ old_splitbuf = _helpers.splitbuf
+ _helpers.splitbuf = splitbuf
+ old_BLOB_MAX = hashsplit.BLOB_MAX
+ hashsplit.BLOB_MAX = 4
+ old_BLOB_READ_SIZE = hashsplit.BLOB_READ_SIZE
+ hashsplit.BLOB_READ_SIZE = 10
+ old_fanout = hashsplit.fanout
+ hashsplit.fanout = 2
+
+ levels = lambda f: [(len(b), l) for b, l in
+ hashsplit.hashsplit_iter([f], True, None)]
+ # Return a string of n null bytes
+ z = lambda n: b'\x00' * n
+ # Return a byte which will be split with a level of n
+ sb = lambda n: bytes_from_uint(basebits + n)
+
+ split_never = BytesIO(z(16))
+ split_first = BytesIO(z(1) + sb(3) + z(14))
+ split_end = BytesIO(z(13) + sb(1) + z(2))
+ split_many = BytesIO(sb(1) + z(3) + sb(2) + z(4) +
+ sb(0) + z(4) + sb(5) + z(1))
+ WVPASSEQ(levels(split_never), [(4, 0), (4, 0), (4, 0), (4, 0)])
+ WVPASSEQ(levels(split_first), [(2, 3), (4, 0), (4, 0), (4, 0), (2, 0)])
+ WVPASSEQ(levels(split_end), [(4, 0), (4, 0), (4, 0), (2, 1), (2, 0)])
+ WVPASSEQ(levels(split_many),
+ [(1, 1), (4, 2), (4, 0), (1, 0), (4, 0), (1, 5), (1, 0)])
+
+ _helpers.splitbuf = old_splitbuf
+ hashsplit.BLOB_MAX = old_BLOB_MAX
+ hashsplit.BLOB_READ_SIZE = old_BLOB_READ_SIZE
+ hashsplit.fanout = old_fanout
projects / bup.git / blobdiff