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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: http://www.opensource.org/licenses/bsd-license.php
"""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)
            asser