# 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"""
from gitdb.test.lib import (
    TestBase,
    DummyStream,
    DeriveTest,
)

from gitdb import (
    OInfo,
    OPackInfo,
    ODeltaPackInfo,
    OStream,
    OPackStream,
    ODeltaPackStream,
    IStream
)
from gitdb.util import (
    NULL_BIN_SHA
)

from gitdb.typ import (
    str_blob_type
)


class TestBaseTypes(TestBase):

    def test_streams(self):
        # test info
        sha = NULL_BIN_SHA
        s = 20
        blob_id = 3

        info = OInfo(sha, str_blob_type, s)
        assert info.binsha == sha
        assert info.type == str_blob_type
        assert info.type_id == blob_id
        assert info.size == s

        # test pack info
        # provides type_id
        pinfo = OPackInfo(0, blob_id, s)
        assert pinfo.type == str_blob_type
        assert pinfo.type_id == blob_id
        assert pinfo.pack_offset == 0

        dpinfo = ODeltaPackInfo(0, blob_id, s, sha)
        assert dpinfo.type == str_blob_type
        assert dpinfo.type_id == blob_id
        assert dpinfo.delta_info == sha
        assert dpinfo.pack_offset == 0

        # test ostream
        stream = DummyStream()
        ostream = OStream(*(info + (stream, )))
        assert ostream.stream is stream
        ostream.read(15)
        stream._assert()
        assert stream.bytes == 15
        ostream.read(20)
        assert stream.bytes == 20

        # test packstream
        postream = OPackStream(*(pinfo + (stream, )))
        assert postream.stream is stream
        postream.read(10)
        stream._assert()
        assert stream.bytes == 10

        # test deltapackstream
        dpostream = ODeltaPackStream(*(dpinfo + (stream, )))
        dpostream.stream is stream
        dpostream.read(5)
        stream._assert()
        assert stream.bytes == 5

        # derive with own args
        DeriveTest(sha, str_blob_type, s, stream, 'mine', myarg=3)._assert()

        # test istream
        istream = IStream(str_blob_type, s, stream)
        assert istream.binsha == None
        istream.binsha = sha
        assert istream.binsha == sha

        assert len(istream.binsha) == 20
        assert len(istream.hexsha) == 40

        assert istream.size == s
        istream.size = s * 2
        istream.size == s * 2
        assert istream.type == str_blob_type
        istream.type = "something"
        assert istream.type == "something"
        assert istream.stream is stream
        istream.stream = None
        assert istream.stream is None

        assert istream.error is None
        istream.error = Exception()
        assert isinstance(istream.error, Exception)