# test_utils.py
# Copyright (C) 2008, 2009 Michael Trier (mtrier@gmail.com) and contributors
#
# This module is part of GitPython and is released under
# the BSD License: http://www.opensource.org/licenses/bsd-license.php

import tempfile

from git.test.lib import (
    TestBase,
    assert_equal
)
from git.util import (
    LockFile,
    BlockingLockFile,
    get_user_id,
    Actor,
    IterableList
)
from git.objects.util import (
    altz_to_utctz_str,
    utctz_to_altz,
    verify_utctz,
    parse_date,
)
from git.cmd import dashify
from git.compat import string_types

import time


class TestIterableMember(object):

    """A member of an iterable list"""
    __slots__ = ("name", "prefix_name")

    def __init__(self, name):
        self.name = name
        self.prefix_name = name


class TestUtils(TestBase):

    def setup(self):
        self.testdict = {
            "string": "42",
            "int": 42,
            "array": [42],
        }

    def test_it_should_dashify(self):
        assert_equal('this-is-my-argument', dashify('this_is_my_argument'))
        assert_equal('foo', dashify('foo'))

    def test_lock_file(self):
        my_file = tempfile.mktemp()
        lock_file = LockFile(my_file)
        assert not lock_file._has_lock()
        # release lock we don't have  - fine
        lock_file._release_lock()

        # get lock
        lock_file._obtain_lock_or_raise()
        assert lock_file._has_lock()

        # concurrent access
        other_lock_file = LockFile(my_file)
        assert not other_lock_file._has_lock()
        self.failUnlessRaises(IOError, other_lock_file._obtain_lock_or_raise)

        lock_file._release_lock()
        assert not lock_file._has_lock()

        other_lock_file._obtain_lock_or_raise()
        self.failUnlessRaises(IOError, lock_file._obtain_lock_or_raise)

        # auto-release on destruction
        del(other_lock_file)
        lock_file._obtain_lock_or_raise()
        lock_file._release_lock()

    def test_blocking_lock_file(self):
        my_file = tempfile.mktemp()
        lock_file = BlockingLockFile(my_file)
        lock_file._obtain_lock()

        # next one waits for the lock
        start = time.time()
        wait_time = 0.1
        wait_lock = BlockingLockFile(my_file, 0.05, wait_time)
        self.failUnlessRaises(IOError, wait_lock._obtain_lock)
        elapsed = time.time() - start
        assert elapsed