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# This module is part of GitDB and is released under

# the New BSD License: https://opensource.org/license/bsd-3-clause/

from gitdb.test.db.lib import (

TestDBBase,

with_rw_directory,

with_packs_rw

)

from gitdb.db import PackedDB

from gitdb.exc import BadObject, AmbiguousObjectName

from gitdb.util import mman

import os

import random

import sys

import pytest

class TestPackDB(TestDBBase):

@with_rw_directory

@with_packs_rw

def test_writing(self, path):

if sys.platform == "win32":

pytest.skip("FIXME: Currently fail on windows")

pdb = PackedDB(path)

# on demand, we init our pack cache

num_packs = len(pdb.entities())

assert pdb._st_mtime != 0

# test pack directory changed:

# packs removed - rename a file, should affect the glob

pack_path = pdb.entities()[0].pack().path()

new_pack_path = pack_path + "renamed"

if sys.platform == "win32":

# While using this function, we are not allowed to have any handle

# to this path, which is currently not the case. The pack caching

# does still have a handle :-(

mman.force_map_handle_removal_win(pack_path)

os.rename(pack_path, new_pack_path)

pdb.update_cache(force=True)

assert len(pdb.entities()) == num_packs - 1

# packs added

os.rename(new_pack_path, pack_path)

pdb.update_cache(force=True)

assert len(pdb.entities()) == num_packs

# bang on the cache

# access the Entities directly, as there is no iteration interface

# yet ( or required for now )

sha_list = list(pdb.sha_iter())

assert len(sha_list) == pdb.size()

# hit all packs in random order

random.shuffle(sha_list)

for sha in sha_list:

pdb.info(sha)

pdb.stream(sha)

# END for each sha to query

# test short finding - be a bit more brutal here

max_bytes = 19

min_bytes = 2

num_ambiguous = 0

for i, sha in enumerate(sha_list):

short_sha = sha[:max((i % max_bytes), min_bytes)]

try:

assert pdb.partial_to_complete_sha(short_sha, len(short_sha) * 2) == sha

except AmbiguousObjectName:

num_ambiguous += 1

pass # valid, we can have short objects

# END exception handling

# END for each sha to find

# we should have at least one ambiguous, considering the small sizes

# but in our pack, there is no ambiguous ...

# assert num_ambiguous

# non-existing

self.assertRaises(BadObject, pdb.partial_to_complete_sha, b'\0\0', 4)

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