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# Copyright (C) 2010, 2011 Sebastian Thiel (byronimo@gmail.com) and contributors
#
# This module is part of GitDB and is released under
# the New BSD License: https://opensource.org/license/bsd-3-clause/
"""Test for object db"""
import
tempfile
import
os
from
gitdb
.
test
.
lib
import
TestBase
from
gitdb
.
util
import
(
to_hex_sha
,
to_bin_sha
,
NULL_HEX_SHA
,
LockedFD
)
class
TestUtils
(
TestBase
):
def
test_basics
(
self
):
assert
to_hex_sha
(
NULL_HEX_SHA
)
==
NULL_HEX_SHA
assert
len
(
to_bin_sha
(
NULL_HEX_SHA
))
==
20
assert
to_hex_sha
(
to_bin_sha
(
NULL_HEX_SHA
))
==
NULL_HEX_SHA
.
encode
(
"ascii"
)
def
_cmp_contents
(
self
,
file_path
,
data
):
# raise if data from file at file_path
# does not match data string
with
open
(
file_path
,
"rb"
)
as
fp
:
assert
fp
.
read
()
==
data
.
encode
(
"ascii"
)
def
test_lockedfd
(
self
):
my_file
=
tempfile
.
mktemp
()
orig_data
=
"hello"
new_data
=
"world"
with
open
(
my_file
,
"wb"
)
as
my_file_fp
:
my_file_fp
.
write
(
orig_data
.
encode
(
"ascii"
))
try
:
lfd
=
LockedFD
(
my_file
)
lockfilepath
=
lfd
.
_lockfilepath
()
# cannot end before it was started
self
.
assertRaises
(
AssertionError
,
lfd
.
rollback
)
self
.
assertRaises
(
AssertionError
,
lfd
.
commit
)
# open for writing
assert
not
os
.
path
.
isfile
(
lockfilepath
)
wfd
=
lfd
.
open
(
write
=
True
)
assert
lfd
.
_fd
is
wfd
assert
os
.
path
.
isfile
(
lockfilepath
)
# write data and fail
os
.
write
(
wfd
,
new_data
.
encode
(
"ascii"
))
lfd
.
rollback
()
assert
lfd
.
_fd
is
None
self
.
_cmp_contents
(
my_file
,
orig_data
)
assert
not
os
.
path
.
isfile
(
lockfilepath
)
# additional call doesn't fail
lfd
.
commit
()
lfd
.
rollback
()
# test reading
lfd
=
LockedFD
(
my_file
)
rfd
=
lfd
.
open
(
write
=
False
)
assert
os
.
read
(
rfd
,
len
(
orig_data
))
==
orig_data
.
encode
(
"ascii"
)
assert
os
.
path
.
isfile
(
lockfilepath
)
# deletion rolls back
del
(
lfd
)
assert
not
os
.
path
.
isfile
(
lockfilepath
)
# write data - concurrently
lfd
=
LockedFD
(
my_file
)
olfd
=
LockedFD
(
my_file
)
assert
not
os
.
path
.
isfile
(
lockfilepath
)
wfdstream
=
lfd
.
open
(
write
=
True
,
stream
=
True
)
# this time as stream
assert
os
.
path
.
isfile
(
lockfilepath
)
# another one fails
self
.
assertRaises
(
IOError
,
olfd
.
open
)
wfdstream
.
write
(
new_data
.
encode
(
"ascii"
))
lfd
.
commit
()
assert
not
os
.
path
.
isfile
(
lockfilepath
)
self
.
_cmp_contents
(
my_file
,
new_data
)
# could test automatic _end_writing on destruction
finally
:
os
.
remove
(
my_file
)
# END final cleanup
# try non-existing file for reading
lfd
=
LockedFD
(
tempfile
.
mktemp
())
try
:
lfd
.
open
(
write
=
False
)
except
OSError
:
assert
not
os
.
path
.
exists
(
lfd
.
_lockfilepath
())
else
:
self
.
fail
(
"expected OSError"
)
# END handle exceptions
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