"""

        raise NotImplementedError

class EmptyChangeset(BaseChangeset):

    """

    An dummy empty changeset. It's possible to pass hash when creating

    an EmptyChangeset

    """

    def __init__(self, cs='0' * 40, repo=None, requested_revision=None,

                 alias=None, revision=-1, message='', author='', date=None):

        self._empty_cs = cs

        self.revision = revision

        self.message = message

        self.author = author

        self.date = date or datetime.datetime.fromtimestamp(0)

        self.repository = repo

        self.requested_revision = requested_revision

        self.alias = alias

    @LazyProperty

    def raw_id(self):

        """

        Returns raw string identifying this changeset, useful for web

        representation.

        """

        return self._empty_cs

    @LazyProperty

    def branch(self):

        from kallithea.lib.vcs.backends import get_backend

        return get_backend(self.alias).DEFAULT_BRANCH_NAME

    @LazyProperty

    def branches(self):

        from kallithea.lib.vcs.backends import get_backend

        return [get_backend(self.alias).DEFAULT_BRANCH_NAME]

    @LazyProperty

    def short_id(self):

        return self.raw_id[:12]

    def get_file_changeset(self, path):

        return self

    def get_file_content(self, path):

    def get_file_size(self, path):

        return 0

class CollectionGenerator(object):

    def __init__(self, repo, revs):

        self.repo = repo

        self.revs = revs

    def __len__(self):

        return len(self.revs)

    def __iter__(self):

        for rev in self.revs:

            yield self.repo.get_changeset(rev)

    def __getitem__(self, what):

        """Return either a single element by index, or a sliced collection."""

        if isinstance(what, slice):

            return CollectionGenerator(self.repo, self.revs[what])

        else:

            # single item

            return self.repo.get_changeset(self.revs[what])

    def __repr__(self):

        return '<CollectionGenerator[len:%s]>' % (len(self))

import mimetypes

import stat

import pytest

from kallithea.lib.vcs.nodes import DirNode, FileNode, Node, NodeError, NodeKind

class TestNodeBasic(object):

    def test_init(self):

        """

        Cannot initialize Node objects with path with slash at the beginning.

        """

        wrong_paths = (

            '/foo',

            '/foo/bar'

        )

        for path in wrong_paths:

            with pytest.raises(NodeError):

                Node(path, NodeKind.FILE)

        wrong_paths = (

            '/foo/',

            '/foo/bar/'

        )

        for path in wrong_paths:

            with pytest.raises(NodeError):

                Node(path, NodeKind.DIR)

    def test_name(self):

        node = Node('', NodeKind.DIR)

        assert node.name == ''

        node = Node('path', NodeKind.FILE)

        assert node.name == 'path'

        node = Node('path/', NodeKind.DIR)

        assert node.name == 'path'

        node = Node('some/path', NodeKind.FILE)

        assert node.name == 'path'

        node = Node('some/path/', NodeKind.DIR)

        assert node.name == 'path'

    def test_root_node(self):

        with pytest.raises(NodeError):

            Node('', NodeKind.FILE)

    def test_kind_setter(self):

        node = Node('', NodeKind.DIR)

        with pytest.raises(NodeError):

        assert mode & stat.S_IWUSR

        assert mode & stat.S_IRGRP

        assert mode & stat.S_IROTH

        assert not mode & stat.S_IWGRP

        assert not mode & stat.S_IWOTH

        assert not mode & stat.S_IXUSR

        assert not mode & stat.S_IXGRP

        assert not mode & stat.S_IXOTH

    def test_file_node_is_executable(self):

        node = FileNode('foobar', 'empty... almost', mode=0o100755)

        assert node.is_executable

        node = FileNode('foobar', 'empty... almost', mode=0o100500)

        assert node.is_executable

        node = FileNode('foobar', 'empty... almost', mode=0o100644)

        assert not node.is_executable

    def test_mimetype(self):

        py_node = FileNode('test.py')

        tar_node = FileNode('test.tar.gz')

        my_node2 = FileNode('myfile2')

        my_node2._content = b'foobar'

        my_node3 = FileNode('myfile3')

        my_node3._content = b'\0foobar'

        assert py_node.mimetype == mimetypes.guess_type(py_node.name)[0]

        assert py_node.get_mimetype() == mimetypes.guess_type(py_node.name)

        assert tar_node.mimetype == mimetypes.guess_type(tar_node.name)[0]

        assert tar_node.get_mimetype() == mimetypes.guess_type(tar_node.name)

        assert my_node2.mimetype == 'text/plain'

        assert my_node2.get_mimetype() == ('text/plain', None)

        assert my_node3.mimetype == 'application/octet-stream'

        assert my_node3.get_mimetype() == ('application/octet-stream', None)

class TestNodeContent(object):

    def test_if_binary(self):

        data = """\x89PNG\r\n\x1a\n\x00\x00\x00\rIHDR\x00\x00\x00\x10\x00\x00\x00\x10\x08\x06\x00\x00\x00\x1f??a\x00\x00\x00\x04gAMA\x00\x00\xaf?7\x05\x8a?\x00\x00\x00\x19tEXtSoftware\x00Adobe ImageReadyq?e<\x00\x00\x025IDAT8?\xa5\x93?K\x94Q\x14\x87\x9f\xf7?Q\x1bs4?\x03\x9a\xa8?B\x02\x8b$\x10[U;i\x13?6h?&h[?"\x14j?\xa2M\x7fB\x14F\x9aQ?&\x842?\x0b\x89"\x82??!?\x9c!\x9c2l??{N\x8bW\x9dY\xb4\t/\x1c?=\x9b?}????\xa9*;9!?\x83\x91?[?\\v*?D\x04\'`EpNp\xa2X\'U?pVq"Sw.\x1e?\x08\x01D?jw????\xbc??7{|\x9b?\x89$\x01??W@\x15\x9c\x05q`Lt/\x97?\x94\xa1d?\x18~?\x18?\x18W[%\xb0?\x83??\x14\x88\x8dB?\xa6H\tL\tl\x19>/\x01`\xac\xabx?\x9cl\nx\xb0\x98\x07\x95\x88D$"q[\x19?d\x00(o\n\xa0??\x7f\xb9\xa4?\x1bF\x1f\x8e\xac\xa8?j??eUU}?.?\x9f\x8cE??x\x94??\r\xbdtoJU5"0N\x10U?\x00??V\t\x02\x9f\x81?U?\x00\x9eM\xae2?r\x9b7\x83\x82\x8aP3????.?&"?\xb7ZP \x0c<?O\xa5\t}\xb8?\x99\xa6?\x87?\x1di|/\xa0??0\xbe\x1fp?d&\x1a\xad\x95\x8a\x07?\t*\x10??b:?d?.\x13C\x8a?\x12\xbe\xbf\x8e?{???\x08?\x80\xa7\x13+d\x13>J?\x80\x15T\x95\x9a\x00??S\x8c\r?\xa1\x03\x07?\x96\x9b\xa7\xab=E??\xa4\xb3?\x19q??B\x91=\x8d??k?J\x0bV"??\xf7x?\xa1\x00?\\.\x87\x87???\x02F@D\x99],??\x10#?X\xb7=\xb9\x10?Z\x1by???cI??\x1ag?\x92\xbc?T?t[\x92\x81?<_\x17~\x92\x88?H%?\x10Q\x02\x9f\n\x81qQ\x0bm?\x1bX?\xb1AK\xa6\x9e\xb9?u\xb2?1\xbe|/\x92M@\xa2!F?\xa9>"\r<DT?>\x92\x8e?>\x9a9Qv\x127?a\xac?Y?8?:??]X???9\x80\xb7?u?\x0b#BZ\x8d=\x1d?p\x00\x00\x00\x00IEND\xaeB`\x82"""

        filenode = FileNode('calendar.png', content=data)

        assert filenode.is_binary