manifests: push down expected node length into the parser
This strictly enforces the node length in the manifest lines according
to what the repository expects. One test case moves large hash testing
into the non-treemanifest part as treemanifests don't provide an
interface for overriding just the node length for now.
Differential Revision: https://phab.mercurial-scm.org/D10533
from __future__ import absolute_import, print_function
import os
import tempfile
from mercurial import (
pycompat,
util,
)
from hgext.fastannotate import error, revmap
if pycompat.ispy3:
xrange = range
def genhsh(i):
return pycompat.bytechr(i) + b'\0' * 19
def gettemppath():
fd, path = tempfile.mkstemp()
os.close(fd)
os.unlink(path)
return path
def ensure(condition):
if not condition:
raise RuntimeError('Unexpected')
def testbasicreadwrite():
path = gettemppath()
rm = revmap.revmap(path)
ensure(rm.maxrev == 0)
for i in xrange(5):
ensure(rm.rev2hsh(i) is None)
ensure(rm.hsh2rev(b'\0' * 20) is None)
paths = [
b'',
b'a',
None,
b'b',
b'b',
b'c',
b'c',
None,
b'a',
b'b',
b'a',
b'a',
]
for i in xrange(1, 5):
ensure(rm.append(genhsh(i), sidebranch=(i & 1), path=paths[i]) == i)
ensure(rm.maxrev == 4)
for i in xrange(1, 5):
ensure(rm.hsh2rev(genhsh(i)) == i)
ensure(rm.rev2hsh(i) == genhsh(i))
# re-load and verify
rm.flush()
rm = revmap.revmap(path)
ensure(rm.maxrev == 4)
for i in xrange(1, 5):
ensure(rm.hsh2rev(genhsh(i)) == i)
ensure(rm.rev2hsh(i) == genhsh(i))
ensure(bool(rm.rev2flag(i) & revmap.sidebranchflag) == bool(i & 1))
# append without calling save() explicitly
for i in xrange(5, 12):
ensure(
rm.append(genhsh(i), sidebranch=(i & 1), path=paths[i], flush=True)
== i
)
# re-load and verify
rm = revmap.revmap(path)
ensure(rm.maxrev == 11)
for i in xrange(1, 12):
ensure(rm.hsh2rev(genhsh(i)) == i)
ensure(rm.rev2hsh(i) == genhsh(i))
ensure(rm.rev2path(i) == paths[i] or paths[i - 1])
ensure(bool(rm.rev2flag(i) & revmap.sidebranchflag) == bool(i & 1))
os.unlink(path)
# missing keys
ensure(rm.rev2hsh(12) is None)
ensure(rm.rev2hsh(0) is None)
ensure(rm.rev2hsh(-1) is None)
ensure(rm.rev2flag(12) is None)
ensure(rm.rev2path(12) is None)
ensure(rm.hsh2rev(b'\1' * 20) is None)
# illformed hash (not 20 bytes)
try:
rm.append(b'\0')
ensure(False)
except Exception:
pass
def testcorruptformat():
path = gettemppath()
# incorrect header
with open(path, 'wb') as f:
f.write(b'NOT A VALID HEADER')
try:
revmap.revmap(path)
ensure(False)
except error.CorruptedFileError:
pass
# rewrite the file
os.unlink(path)
rm = revmap.revmap(path)
rm.append(genhsh(0), flush=True)
rm = revmap.revmap(path)
ensure(rm.maxrev == 1)
# corrupt the file by appending a byte
size = os.stat(path).st_size
with open(path, 'ab') as f:
f.write(b'\xff')
try:
revmap.revmap(path)
ensure(False)
except error.CorruptedFileError:
pass
# corrupt the file by removing the last byte
ensure(size > 0)
with open(path, 'wb') as f:
f.truncate(size - 1)
try:
revmap.revmap(path)
ensure(False)
except error.CorruptedFileError:
pass
os.unlink(path)
def testcopyfrom():
path = gettemppath()
rm = revmap.revmap(path)
for i in xrange(1, 10):
ensure(
rm.append(genhsh(i), sidebranch=(i & 1), path=(b'%d' % (i // 3)))
== i
)
rm.flush()
# copy rm to rm2
rm2 = revmap.revmap()
rm2.copyfrom(rm)
path2 = gettemppath()
rm2.path = path2
rm2.flush()
# two files should be the same
ensure(len({util.readfile(p) for p in [path, path2]}) == 1)
os.unlink(path)
os.unlink(path2)
class fakefctx(object):
def __init__(self, node, path=None):
self._node = node
self._path = path
def node(self):
return self._node
def path(self):
return self._path
def testcontains():
path = gettemppath()
rm = revmap.revmap(path)
for i in xrange(1, 5):
ensure(rm.append(genhsh(i), sidebranch=(i & 1)) == i)
for i in xrange(1, 5):
ensure(((genhsh(i), None) in rm) == ((i & 1) == 0))
ensure((fakefctx(genhsh(i)) in rm) == ((i & 1) == 0))
for i in xrange(5, 10):
ensure(fakefctx(genhsh(i)) not in rm)
ensure((genhsh(i), None) not in rm)
# "contains" checks paths
rm = revmap.revmap()
for i in xrange(1, 5):
ensure(rm.append(genhsh(i), path=(b'%d' % (i // 2))) == i)
for i in xrange(1, 5):
ensure(fakefctx(genhsh(i), path=(b'%d' % (i // 2))) in rm)
ensure(fakefctx(genhsh(i), path=b'a') not in rm)
def testlastnode():
path = gettemppath()
ensure(revmap.getlastnode(path) is None)
rm = revmap.revmap(path)
ensure(revmap.getlastnode(path) is None)
for i in xrange(1, 10):
hsh = genhsh(i)
rm.append(hsh, path=(b'%d' % (i // 2)), flush=True)
ensure(revmap.getlastnode(path) == hsh)
rm2 = revmap.revmap(path)
ensure(rm2.rev2hsh(rm2.maxrev) == hsh)
testbasicreadwrite()
testcorruptformat()
testcopyfrom()
testcontains()
testlastnode()