# test_client.py -- Tests for the git protocol, client side
# Copyright (C) 2009 Jelmer Vernooij <jelmer@jelmer.uk>
#
# Dulwich is dual-licensed under the Apache License, Version 2.0 and the GNU
# General Public License as public by the Free Software Foundation; version 2.0
# or (at your option) any later version. You can redistribute it and/or
# modify it under the terms of either of these two licenses.
#
# Unless required by applicable law or agreed to in writing, software
# distributed under the License is distributed on an "AS IS" BASIS,
# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
# See the License for the specific language governing permissions and
# limitations under the License.
#
# You should have received a copy of the licenses; if not, see
# <http://www.gnu.org/licenses/> for a copy of the GNU General Public License
# and <http://www.apache.org/licenses/LICENSE-2.0> for a copy of the Apache
# License, Version 2.0.
#

from io import BytesIO
import base64
import os
import sys
import shutil
import tempfile
import warnings

from urllib.parse import (
    quote as urlquote,
    urlparse,
)

import dulwich
from dulwich import (
    client,
)
from dulwich.client import (
    InvalidWants,
    LocalGitClient,
    TraditionalGitClient,
    TCPGitClient,
    SSHGitClient,
    HttpGitClient,
    FetchPackResult,
    ReportStatusParser,
    SendPackError,
    StrangeHostname,
    SubprocessSSHVendor,
    PLinkSSHVendor,
    HangupException,
    GitProtocolError,
    check_wants,
    default_urllib3_manager,
    get_credentials_from_store,
    get_transport_and_path,
    get_transport_and_path_from_url,
    parse_rsync_url,
    _remote_error_from_stderr,
)
from dulwich.config import (
    ConfigDict,
)
from dulwich.tests import (
    TestCase,
)
from dulwich.protocol import (
    TCP_GIT_PORT,
    Protocol,
)
from dulwich.pack import (
    pack_objects_to_data,
    write_pack_data,
    write_pack_objects,
)
from dulwich.objects import Commit, Tree
from dulwich.repo import (
    MemoryRepo,
    Repo,
)
from dulwich.tests import skipIf
from dulwich.tests.utils import (
    open_repo,
    tear_down_repo,
    setup_warning_catcher,
)


class DummyClient(TraditionalGitClient):
    def __init__(self, can_read, read, write):
        self.can_read = can_read
        self.read = read
        self.write = write
        TraditionalGitClient.__init__(self)

    def _connect(self, service, path):
        return Protocol(self.read, self.write), self.can_read, None


class DummyPopen:
    def __init__(self, *args, **kwards):
        self.stdin = BytesIO(b"stdin")
        self.stdout = BytesIO(b"stdout")
        self.stderr = BytesIO(b"stderr")
        self.returncode = 0
        self.args = args
        self.kwargs = kwards

    def communicate(self, *args, **kwards):
        return ("Running", "")

    def wait(self, *args, **kwards):
        return False


# TODO(durin42): add unit-level tests of GitClient
class GitClientTests(TestCase):
    def setUp(self):
        super(GitClientTests, self).setUp()
        self.rout = BytesIO()
        self.rin = BytesIO()
        self.client = DummyClient(lambda x: True, self.rin.read, self.rout.write)

    def test_caps(self):
        agent_cap = ("agent=dulwich/%d.%d.%d" % dulwich.__version__).encode("ascii")
        self.assertEqual(
            set(
                [
                    b"multi_ack",
                    b"side-band-64k",
                    b"ofs-delta",
                    b"thin-pack",
                    b"multi_ack_detailed",
                    b"shallow",
                    agent_cap,
                ]
            ),
            set(self.client._fetch_capabilities),
        )
        self.assertEqual(
            set(
                [
                    b"delete-refs",
                    b"ofs-delta",
                    b"report-status",
                    b"side-band-64k",
                    agent_cap,
                ]
            ),
            set(self.client._send_capabilities),
        )

    def test_archive_ack(self):
        self.rin.write(b"0009NACK\n" b"0000")
        self.rin.seek(0)
        self.client.archive(b"bla", b"HEAD", None, None)
        self.assertEqual(self.rout.getvalue(), b"0011argument HEAD0000")

    def test_fetch_empty(self):
        self.rin.write(b"0000")
        self.rin.seek(0)

        def check_heads(heads, **kwargs):
            self.assertEqual(heads, {})
            return []

        ret = self.client.fetch_pack(b"/", check_heads, None, None)
        self.assertEqual({}, ret.refs)
        self.assertEqual({}, ret.symrefs)

    def test_fetch_pack_ignores_magic_ref(self):
        self.rin.write(
            b"00000000000000000000000000000000000000000000 capabilities^{}"
            b"\x00 multi_ack "
            b"thin-pack side-band side-band-64k ofs-delta shallow no-progress "
            b"include-tag\n"
            b"0000"
        )
        self.rin.seek(0)

        def check_heads(heads, **kwargs):
            self.assertEqual({}, heads)
            return []

        ret = self.client.fetch_pack(b"bla", check_heads, None, None, None)
        self.assertEqual({}, ret.refs)
        self.assertEqual({}, ret.symrefs)
        self.assertEqual(self.rout.getvalue(), b"0000")

    def test_fetch_pack_none(self):
        self.rin.write(
            b"008855dcc6bf963f922e1ed5c4bbaaefcfacef57b1d7 HEAD\x00multi_ack "
            b"thin-pack side-band side-band-64k ofs-delta shallow no-progress "
            b"include-tag\n"
            b"0000"
        )
        self.rin.seek(0)
        ret = self.client.fetch_pack(b"bla", lambda heads, **kwargs: [], None, None, None)
        self.assertEqual(
            {b"HEAD": b"55dcc6bf963f922e1ed5c4bbaaefcfacef57b1d7"}, ret.refs
        )
        self.assertEqual({}, ret.symrefs)
        self.assertEqual(self.rout.getvalue(), b"0000")

    def test_send_pack_no_sideband64k_with_update_ref_error(self):
        # No side-bank-64k reported by server shouldn't try to parse
        # side band data
        pkts = [
            b"55dcc6bf963f922e1ed5c4bbaaefcfacef57b1d7 capabilities^{}"
            b"\x00 report-status delete-refs ofs-delta\n",
            b"",
            b"unpack ok",
            b"ng refs/foo/bar pre-receive hook declined",
            b"",
        ]
        for pkt in pkts:
            if pkt == b"":
                self.rin.write(b"0000")
            else:
                self.rin.write(("%04x" % (len(pkt) + 4)).encode("ascii") + pkt)
        self.rin.seek(0)

        tree = Tree()
        commit = Commit()
        commit.tree = tree
        commit.parents = []
        commit.author = commit.committer = b"test user"
        commit.commit_time = commit.author_time = 1174773719
        commit.commit_timezone = commit.author_timezone = 0
        commit.encoding = b"UTF-8"
        commit.message = b"test message"

        def update_refs(refs):
            return {
                b"refs/foo/bar": commit.id,
            }

        def generate_pack_data(have, want, ofs_delta=False):
            return pack_objects_to_data(
                [
                    (commit, None),
                    (tree, ""),
                ]
            )

        result = self.client.send_pack("blah", update_refs, generate_pack_data)
        self.assertEqual(
            {b"refs/foo/bar": "pre-receive hook declined"}, result.ref_status
        )
        self.assertEqual({b"refs/foo/bar": commit.id}, result.refs)

    def test_send_pack_none(self):
        # Set ref to current value
        self.rin.write(
            b"0078310ca9477129b8586fa2afc779c1f57cf64bba6c "
            b"refs/heads/master\x00 report-status delete-refs "
            b"side-band-64k quiet ofs-delta\n"
            b"0000"
        )
        self.rin.seek(0)

        def update_refs(refs):
            return {b"refs/heads/master": b"310ca9477129b8586fa2afc779c1f57cf64bba6c"}

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        self.client.send_pack(b"/", update_refs, generate_pack_data)
        self.assertEqual(self.rout.getvalue(), b"0000")

    def test_send_pack_keep_and_delete(self):
        self.rin.write(
            b"0063310ca9477129b8586fa2afc779c1f57cf64bba6c "
            b"refs/heads/master\x00report-status delete-refs ofs-delta\n"
            b"003f310ca9477129b8586fa2afc779c1f57cf64bba6c refs/heads/keepme\n"
            b"0000000eunpack ok\n"
            b"0019ok refs/heads/master\n"
            b"0000"
        )
        self.rin.seek(0)

        def update_refs(refs):
            return {b"refs/heads/master": b"0" * 40}

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        self.client.send_pack(b"/", update_refs, generate_pack_data)
        self.assertEqual(
            self.rout.getvalue(),
            b"008b310ca9477129b8586fa2afc779c1f57cf64bba6c "
            b"0000000000000000000000000000000000000000 "
            b"refs/heads/master\x00delete-refs ofs-delta report-status0000",
        )

    def test_send_pack_delete_only(self):
        self.rin.write(
            b"0063310ca9477129b8586fa2afc779c1f57cf64bba6c "
            b"refs/heads/master\x00report-status delete-refs ofs-delta\n"
            b"0000000eunpack ok\n"
            b"0019ok refs/heads/master\n"
            b"0000"
        )
        self.rin.seek(0)

        def update_refs(refs):
            return {b"refs/heads/master": b"0" * 40}

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        self.client.send_pack(b"/", update_refs, generate_pack_data)
        self.assertEqual(
            self.rout.getvalue(),
            b"008b310ca9477129b8586fa2afc779c1f57cf64bba6c "
            b"0000000000000000000000000000000000000000 "
            b"refs/heads/master\x00delete-refs ofs-delta report-status0000",
        )

    def test_send_pack_new_ref_only(self):
        self.rin.write(
            b"0063310ca9477129b8586fa2afc779c1f57cf64bba6c "
            b"refs/heads/master\x00report-status delete-refs ofs-delta\n"
            b"0000000eunpack ok\n"
            b"0019ok refs/heads/blah12\n"
            b"0000"
        )
        self.rin.seek(0)

        def update_refs(refs):
            return {
                b"refs/heads/blah12": b"310ca9477129b8586fa2afc779c1f57cf64bba6c",
                b"refs/heads/master": b"310ca9477129b8586fa2afc779c1f57cf64bba6c",
            }

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        f = BytesIO()
        write_pack_objects(f, {})
        self.client.send_pack("/", update_refs, generate_pack_data)
        self.assertEqual(
            self.rout.getvalue(),
            b"008b0000000000000000000000000000000000000000 "
            b"310ca9477129b8586fa2afc779c1f57cf64bba6c "
            b"refs/heads/blah12\x00delete-refs ofs-delta report-status0000"
            + f.getvalue(),
        )

    def test_send_pack_new_ref(self):
        self.rin.write(
            b"0064310ca9477129b8586fa2afc779c1f57cf64bba6c "
            b"refs/heads/master\x00 report-status delete-refs ofs-delta\n"
            b"0000000eunpack ok\n"
            b"0019ok refs/heads/blah12\n"
            b"0000"
        )
        self.rin.seek(0)

        tree = Tree()
        commit = Commit()
        commit.tree = tree
        commit.parents = []
        commit.author = commit.committer = b"test user"
        commit.commit_time = commit.author_time = 1174773719
        commit.commit_timezone = commit.author_timezone = 0
        commit.encoding = b"UTF-8"
        commit.message = b"test message"

        def update_refs(refs):
            return {
                b"refs/heads/blah12": commit.id,
                b"refs/heads/master": b"310ca9477129b8586fa2afc779c1f57cf64bba6c",
            }

        def generate_pack_data(have, want, ofs_delta=False):
            return pack_objects_to_data(
                [
                    (commit, None),
                    (tree, b""),
                ]
            )

        f = BytesIO()
        write_pack_data(f, *generate_pack_data(None, None))
        self.client.send_pack(b"/", update_refs, generate_pack_data)
        self.assertEqual(
            self.rout.getvalue(),
            b"008b0000000000000000000000000000000000000000 "
            + commit.id
            + b" refs/heads/blah12\x00delete-refs ofs-delta report-status0000"
            + f.getvalue(),
        )

    def test_send_pack_no_deleteref_delete_only(self):
        pkts = [
            b"310ca9477129b8586fa2afc779c1f57cf64bba6c refs/heads/master"
            b"\x00 report-status ofs-delta\n",
            b"",
            b"",
        ]
        for pkt in pkts:
            if pkt == b"":
                self.rin.write(b"0000")
            else:
                self.rin.write(("%04x" % (len(pkt) + 4)).encode("ascii") + pkt)
        self.rin.seek(0)

        def update_refs(refs):
            return {b"refs/heads/master": b"0" * 40}

        def generate_pack_data(have, want, ofs_delta=False):
            return 0, []

        result = self.client.send_pack(b"/", update_refs, generate_pack_data)
        self.assertEqual(
            result.ref_status,
            {b"refs/heads/master": "remote does not support deleting refs"},
        )
        self.assertEqual(
            result.refs,
            {b"refs/heads/master": b"310ca9477129b8586fa2afc779c1f57cf64bba6c"},
        )
        self.assertEqual(self.rout.getvalue(), b"0000")


class TestGetTransportAndPath(TestCase):
    def test_tcp(self):
        c, path = get_transport_and_path("git://foo.com/bar/baz")
        self.assertTrue(isinstance(c, TCPGitClient))
        self.assertEqual("foo.com", c._host)
        self.assertEqual(TCP_GIT_PORT, c._port)
        self.assertEqual("/bar/baz", path)

    def test_tcp_port(self):
        c, path = get_transport_and_path("git://foo.com:1234/bar/baz")
        self.assertTrue(isinstance(c, TCPGitClient))
        self.assertEqual("foo.com", c._host)
        self.assertEqual(1234, c._port)
        self.assertEqual("/bar/baz", path)

    def test_git_ssh_explicit(self):
        c, path = get_transport_and_path("git+ssh://foo.com/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual("/bar/baz", path)

    def test_ssh_explicit(self):
        c, path = get_transport_and_path("ssh://foo.com/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual("/bar/baz", path)

    def test_ssh_port_explicit(self):
        c, path = get_transport_and_path("git+ssh://foo.com:1234/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(1234, c.port)
        self.assertEqual("/bar/baz", path)

    def test_username_and_port_explicit_unknown_scheme(self):
        c, path = get_transport_and_path("unknown://git@server:7999/dply/stuff.git")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("unknown", c.host)
        self.assertEqual("//git@server:7999/dply/stuff.git", path)

    def test_username_and_port_explicit(self):
        c, path = get_transport_and_path("ssh://git@server:7999/dply/stuff.git")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("git", c.username)
        self.assertEqual("server", c.host)
        self.assertEqual(7999, c.port)
        self.assertEqual("/dply/stuff.git", path)

    def test_ssh_abspath_doubleslash(self):
        c, path = get_transport_and_path("git+ssh://foo.com//bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual("//bar/baz", path)

    def test_ssh_port(self):
        c, path = get_transport_and_path("git+ssh://foo.com:1234/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(1234, c.port)
        self.assertEqual("/bar/baz", path)

    def test_ssh_implicit(self):
        c, path = get_transport_and_path("foo:/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual("/bar/baz", path)

    def test_ssh_host(self):
        c, path = get_transport_and_path("foo.com:/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual("/bar/baz", path)

    def test_ssh_user_host(self):
        c, path = get_transport_and_path("user@foo.com:/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual("user", c.username)
        self.assertEqual("/bar/baz", path)

    def test_ssh_relpath(self):
        c, path = get_transport_and_path("foo:bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual("bar/baz", path)

    def test_ssh_host_relpath(self):
        c, path = get_transport_and_path("foo.com:bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual("bar/baz", path)

    def test_ssh_user_host_relpath(self):
        c, path = get_transport_and_path("user@foo.com:bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual("user", c.username)
        self.assertEqual("bar/baz", path)

    def test_local(self):
        c, path = get_transport_and_path("foo.bar/baz")
        self.assertTrue(isinstance(c, LocalGitClient))
        self.assertEqual("foo.bar/baz", path)

    @skipIf(sys.platform != "win32", "Behaviour only happens on windows.")
    def test_local_abs_windows_path(self):
        c, path = get_transport_and_path("C:\\foo.bar\\baz")
        self.assertTrue(isinstance(c, LocalGitClient))
        self.assertEqual("C:\\foo.bar\\baz", path)

    def test_error(self):
        # Need to use a known urlparse.uses_netloc URL scheme to get the
        # expected parsing of the URL on Python versions less than 2.6.5
        c, path = get_transport_and_path("prospero://bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))

    def test_http(self):
        url = "https://github.com/jelmer/dulwich"
        c, path = get_transport_and_path(url)
        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual("/jelmer/dulwich", path)

    def test_http_auth(self):
        url = "https://user:passwd@github.com/jelmer/dulwich"

        c, path = get_transport_and_path(url)

        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual("/jelmer/dulwich", path)
        self.assertEqual("user", c._username)
        self.assertEqual("passwd", c._password)

    def test_http_auth_with_username(self):
        url = "https://github.com/jelmer/dulwich"

        c, path = get_transport_and_path(url, username="user2", password="blah")

        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual("/jelmer/dulwich", path)
        self.assertEqual("user2", c._username)
        self.assertEqual("blah", c._password)

    def test_http_auth_with_username_and_in_url(self):
        url = "https://user:passwd@github.com/jelmer/dulwich"

        c, path = get_transport_and_path(url, username="user2", password="blah")

        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual("/jelmer/dulwich", path)
        self.assertEqual("user", c._username)
        self.assertEqual("passwd", c._password)

    def test_http_no_auth(self):
        url = "https://github.com/jelmer/dulwich"

        c, path = get_transport_and_path(url)

        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual("/jelmer/dulwich", path)
        self.assertIs(None, c._username)
        self.assertIs(None, c._password)


class TestGetTransportAndPathFromUrl(TestCase):
    def test_tcp(self):
        c, path = get_transport_and_path_from_url("git://foo.com/bar/baz")
        self.assertTrue(isinstance(c, TCPGitClient))
        self.assertEqual("foo.com", c._host)
        self.assertEqual(TCP_GIT_PORT, c._port)
        self.assertEqual("/bar/baz", path)

    def test_tcp_port(self):
        c, path = get_transport_and_path_from_url("git://foo.com:1234/bar/baz")
        self.assertTrue(isinstance(c, TCPGitClient))
        self.assertEqual("foo.com", c._host)
        self.assertEqual(1234, c._port)
        self.assertEqual("/bar/baz", path)

    def test_ssh_explicit(self):
        c, path = get_transport_and_path_from_url("git+ssh://foo.com/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual("/bar/baz", path)

    def test_ssh_port_explicit(self):
        c, path = get_transport_and_path_from_url("git+ssh://foo.com:1234/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(1234, c.port)
        self.assertEqual("/bar/baz", path)

    def test_ssh_homepath(self):
        c, path = get_transport_and_path_from_url("git+ssh://foo.com/~/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(None, c.port)
        self.assertEqual(None, c.username)
        self.assertEqual("/~/bar/baz", path)

    def test_ssh_port_homepath(self):
        c, path = get_transport_and_path_from_url("git+ssh://foo.com:1234/~/bar/baz")
        self.assertTrue(isinstance(c, SSHGitClient))
        self.assertEqual("foo.com", c.host)
        self.assertEqual(1234, c.port)
        self.assertEqual("/~/bar/baz", path)

    def test_ssh_host_relpath(self):
        self.assertRaises(
            ValueError, get_transport_and_path_from_url, "foo.com:bar/baz"
        )

    def test_ssh_user_host_relpath(self):
        self.assertRaises(
            ValueError, get_transport_and_path_from_url, "user@foo.com:bar/baz"
        )

    def test_local_path(self):
        self.assertRaises(ValueError, get_transport_and_path_from_url, "foo.bar/baz")

    def test_error(self):
        # Need to use a known urlparse.uses_netloc URL scheme to get the
        # expected parsing of the URL on Python versions less than 2.6.5
        self.assertRaises(
            ValueError, get_transport_and_path_from_url, "prospero://bar/baz"
        )

    def test_http(self):
        url = "https://github.com/jelmer/dulwich"
        c, path = get_transport_and_path_from_url(url)
        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual("https://github.com", c.get_url(b"/"))
        self.assertEqual("/jelmer/dulwich", path)

    def test_http_port(self):
        url = "https://github.com:9090/jelmer/dulwich"
        c, path = get_transport_and_path_from_url(url)
        self.assertEqual("https://github.com:9090", c.get_url(b"/"))
        self.assertTrue(isinstance(c, HttpGitClient))
        self.assertEqual("/jelmer/dulwich", path)

    def test_file(self):
        c, path = get_transport_and_path_from_url("file:///home/jelmer/foo")
        self.assertTrue(isinstance(c, LocalGitClient))
        self.assertEqual("/home/jelmer/foo", path)


class TestSSHVendor(object):
    def __init__(self):
        self.host = None
        self.command = ""
        self.username = None
        self.port = None
        self.password = None
        self.key_filename = None

    def run_command(
        self,
        host,
        command,
        username=None,
        port=None,
        password=None,
        key_filename=None,
        ssh_command=None,
    ):
        self.host = host
        self.command = command
        self.username = username
        self.port = port
        self.password = password
        self.key_filename = key_filename
        self.ssh_command = ssh_command

        class Subprocess:
            pass

        setattr(Subprocess, "read", lambda: None)
        setattr(Subprocess, "write", lambda: None)
        setattr(Subprocess, "close", lambda: None)
        setattr(Subprocess, "can_read", lambda: None)
        return Subprocess()


class SSHGitClientTests(TestCase):
    def setUp(self):
        super(SSHGitClientTests, self).setUp()

        self.server = TestSSHVendor()
        self.real_vendor = client.get_ssh_vendor
        client.get_ssh_vendor = lambda: self.server

        self.client = SSHGitClient("git.samba.org")

    def tearDown(self):
        super(SSHGitClientTests, self).tearDown()
        client.get_ssh_vendor = self.real_vendor

    def test_get_url(self):
        path = "/tmp/repo.git"
        c = SSHGitClient("git.samba.org")

        url = c.get_url(path)
        self.assertEqual("ssh://git.samba.org/tmp/repo.git", url)

    def test_get_url_with_username_and_port(self):
        path = "/tmp/repo.git"
        c = SSHGitClient("git.samba.org", port=2222, username="user")

        url = c.get_url(path)
        self.assertEqual("ssh://user@git.samba.org:2222/tmp/repo.git", url)

    def test_default_command(self):
        self.assertEqual(b"git-upload-pack", self.client._get_cmd_path(b"upload-pack"))

    def test_alternative_command_path(self):
        self.client.alternative_paths[b"upload-pack"] = b"/usr/lib/git/git-upload-pack"
        self.assertEqual(
            b"/usr/lib/git/git-upload-pack",
            self.client._get_cmd_path(b"upload-pack"),
        )

    def test_alternative_command_path_spaces(self):
        self.client.alternative_paths[
            b"upload-pack"
        ] = b"/usr/lib/git/git-upload-pack -ibla"
        self.assertEqual(
            b"/usr/lib/git/git-upload-pack -ibla",
            self.client._get_cmd_path(b"upload-pack"),
        )

    def test_connect(self):
        server = self.server
        client = self.client

        client.username = b"username"
        client.port = 1337

        client._connect(b"command", b"/path/to/repo")
        self.assertEqual(b"username", server.username)
        self.assertEqual(1337, server.port)
        self.assertEqual("git-command '/path/to/repo'", server.command)

        client._connect(b"relative-command", b"/~/path/to/repo")
        self.assertEqual("git-relative-command '~/path/to/repo'", server.command)

    def test_ssh_command_precedence(self):
        os.environ["GIT_SSH"] = "/path/to/ssh"
        test_client = SSHGitClient("git.samba.org")
        self.assertEqual(test_client.ssh_command, "/path/to/ssh")

        os.environ["GIT_SSH_COMMAND"] = "/path/to/ssh -o Option=Value"
        test_client = SSHGitClient("git.samba.org")
        self.assertEqual(test_client.ssh_command, "/path/to/ssh -o Option=Value")

        test_client = SSHGitClient("git.samba.org", ssh_command="ssh -o Option1=Value1")
        self.assertEqual(test_client.ssh_command, "ssh -o Option1=Value1")

        del os.environ["GIT_SSH"]
        del os.environ["GIT_SSH_COMMAND"]


class ReportStatusParserTests(TestCase):
    def test_invalid_pack(self):
        parser = ReportStatusParser()
        parser.handle_packet(b"unpack error - foo bar")
        parser.handle_packet(b"ok refs/foo/bar")
        parser.handle_packet(None)
        self.assertRaises(SendPackError, list, parser.check())

    def test_update_refs_error(self):
        parser = ReportStatusParser()
        parser.handle_packet(b"unpack ok")
        parser.handle_packet(b"ng refs/foo/bar need to pull")
        parser.handle_packet(None)
        self.assertEqual([(b"refs/foo/bar", "need to pull")], list(parser.check()))

    def test_ok(self):
        parser = ReportStatusParser()
        parser.handle_packet(b"unpack ok")
        parser.handle_packet(b"ok refs/foo/bar")
        parser.handle_packet(None)
        self.assertEqual([(b"refs/foo/bar", None)], list(parser.check()))


class LocalGitClientTests(TestCase):
    def test_get_url(self):
        path = "/tmp/repo.git"
        c = LocalGitClient()

        url = c.get_url(path)
        self.assertEqual("file:///tmp/repo.git", url)

    def test_fetch_into_empty(self):
        c = LocalGitClient()
        t = MemoryRepo()
        s = open_repo("a.git")
        self.addCleanup(tear_down_repo, s)
        self.assertEqual(s.get_refs(), c.fetch(s.path, t).refs)

    def test_clone(self):
        c = LocalGitClient()
        s = open_repo("a.git")
        self.addCleanup(tear_down_repo, s)
        target = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, target)
        result_repo = c.clone(s.path, target, mkdir=False)
        self.addCleanup(result_repo.close)
        expected = dict(s.get_refs())
        expected[b'refs/remotes/origin/HEAD'] = expected[b'HEAD']
        expected[b'refs/remotes/origin/master'] = expected[b'refs/heads/master']
        self.assertEqual(expected, result_repo.get_refs())

    def test_fetch_empty(self):
        c = LocalGitClient()
        s = open_repo("a.git")
        self.addCleanup(tear_down_repo, s)
        out = BytesIO()
        walker = {}
        ret = c.fetch_pack(
            s.path, lambda heads, **kwargs: [], graph_walker=walker, pack_data=out.write
        )
        self.assertEqual(
            {
                b"HEAD": b"a90fa2d900a17e99b433217e988c4eb4a2e9a097",
                b"refs/heads/master": b"a90fa2d900a17e99b433217e988c4eb4a2e9a097",
                b"refs/tags/mytag": b"28237f4dc30d0d462658d6b937b08a0f0b6ef55a",
                b"refs/tags/mytag-packed": b"b0931cadc54336e78a1d980420e3268903b57a50",
            },
            ret.refs,
        )
        self.assertEqual({b"HEAD": b"refs/heads/master"}, ret.symrefs)
        self.assertEqual(
            b"PACK\x00\x00\x00\x02\x00\x00\x00\x00\x02\x9d\x08"
            b"\x82;\xd8\xa8\xea\xb5\x10\xadj\xc7\\\x82<\xfd>\xd3\x1e",
            out.getvalue(),
        )

    def test_fetch_pack_none(self):
        c = LocalGitClient()
        s = open_repo("a.git")
        self.addCleanup(tear_down_repo, s)
        out = BytesIO()
        walker = MemoryRepo().get_graph_walker()
        ret = c.fetch_pack(
            s.path,
            lambda heads, **kwargs: [b"a90fa2d900a17e99b433217e988c4eb4a2e9a097"],
            graph_walker=walker,
            pack_data=out.write,
        )
        self.assertEqual({b"HEAD": b"refs/heads/master"}, ret.symrefs)
        self.assertEqual(
            {
                b"HEAD": b"a90fa2d900a17e99b433217e988c4eb4a2e9a097",
                b"refs/heads/master": b"a90fa2d900a17e99b433217e988c4eb4a2e9a097",
                b"refs/tags/mytag": b"28237f4dc30d0d462658d6b937b08a0f0b6ef55a",
                b"refs/tags/mytag-packed": b"b0931cadc54336e78a1d980420e3268903b57a50",
            },
            ret.refs,
        )
        # Hardcoding is not ideal, but we'll fix that some other day..
        self.assertTrue(
            out.getvalue().startswith(b"PACK\x00\x00\x00\x02\x00\x00\x00\x07")
        )

    def test_send_pack_without_changes(self):
        local = open_repo("a.git")
        self.addCleanup(tear_down_repo, local)

        target = open_repo("a.git")
        self.addCleanup(tear_down_repo, target)

        self.send_and_verify(b"master", local, target)

    def test_send_pack_with_changes(self):
        local = open_repo("a.git")
        self.addCleanup(tear_down_repo, local)

        target_path = tempfile.mkdtemp()
        self.addCleanup(shutil.rmtree, target_path)
        with Repo.init_bare(target_path) as target:
            self.send_and_verify(b"master", local, target)

    def test_get_refs(self):
        local = open_repo("refs.git")
        self.addCleanup(tear_down_repo, local)

        client = LocalGitClient()
        refs = client.get_refs(local.path)
        self.assertDictEqual(local.refs.as_dict(), refs)

    def send_and_verify(self, branch, local, target):
        """Send branch from local to remote repository and verify it worked."""
        client = LocalGitClient()
        ref_name = b"refs/heads/" + branch
        result = client.send_pack(
            target.path,
            lambda _: {ref_name: local.refs[ref_name]},
            local.generate_pack_data,
        )

        self.assertEqual(local.refs[ref_name], result.refs[ref_name])
        self.assertIs(None, result.agent)
        self.assertEqual({}, result.ref_status)

        obj_local = local.get_object(result.refs[ref_name])
        obj_target = target.get_object(result.refs[ref_name])
        self.assertEqual(obj_local, obj_target)


class HttpGitClientTests(TestCase):
    def test_get_url(self):
        base_url = "https://github.com/jelmer/dulwich"
        path = "/jelmer/dulwich"
        c = HttpGitClient(base_url)

        url = c.get_url(path)
        self.assertEqual("https://github.com/jelmer/dulwich", url)

    def test_get_url_bytes_path(self):
        base_url = "https://github.com/jelmer/dulwich"
        path_bytes = b"/jelmer/dulwich"
        c = HttpGitClient(base_url)

        url = c.get_url(path_bytes)
        self.assertEqual("https://github.com/jelmer/dulwich", url)

    def test_get_url_with_username_and_passwd(self):
        base_url = "https://github.com/jelmer/dulwich"
        path = "/jelmer/dulwich"
        c = HttpGitClient(base_url, username="USERNAME", password="PASSWD")

        url = c.get_url(path)
        self.assertEqual("https://github.com/jelmer/dulwich", url)

    def test_init_username_passwd_set(self):
        url = "https://github.com/jelmer/dulwich"

        c = HttpGitClient(url, config=None, username="user", password="passwd")
        self.assertEqual("user", c._username)
        self.assertEqual("passwd", c._password)

        basic_auth = c.pool_manager.headers["authorization"]
        auth_string = "%s:%s" % ("user", "passwd")
        b64_credentials = base64.b64encode(auth_string.encode("latin1"))
        expected_basic_auth = "Basic %s" % b64_credentials.decode("latin1")
        self.assertEqual(basic_auth, expected_basic_auth)

    def test_init_no_username_passwd(self):
        url = "https://github.com/jelmer/dulwich"

        c = HttpGitClient(url, config=None)
        self.assertIs(None, c._username)
        self.assertIs(None, c._password)
        self.assertNotIn("authorization", c.pool_manager.headers)

    def test_from_parsedurl_on_url_with_quoted_credentials(self):
        original_username = "john|the|first"
        quoted_username = urlquote(original_username)

        original_password = "Ya#1$2%3"
        quoted_password = urlquote(original_password)

        url = "https://{username}:{password}@github.com/jelmer/dulwich".format(
            username=quoted_username, password=quoted_password
        )

        c = HttpGitClient.from_parsedurl(urlparse(url))
        self.assertEqual(original_username, c._username)
        self.assertEqual(original_password, c._password)

        basic_auth = c.pool_manager.headers["authorization"]
        auth_string = "%s:%s" % (original_username, original_password)
        b64_credentials = base64.b64encode(auth_string.encode("latin1"))
        expected_basic_auth = "Basic %s" % b64_credentials.decode("latin1")
        self.assertEqual(basic_auth, expected_basic_auth)

    def test_url_redirect_location(self):
        from urllib3.response import HTTPResponse

        test_data = {
            "https://gitlab.com/inkscape/inkscape/": {
                "redirect_url": "https://gitlab.com/inkscape/inkscape.git/",
                "refs_data": (
                    b"001e# service=git-upload-pack\n00000032"
                    b"fb2bebf4919a011f0fd7cec085443d0031228e76 "
                    b"HEAD\n0000"
                ),
            },
            "https://github.com/jelmer/dulwich/": {
                "redirect_url": "https://github.com/jelmer/dulwich/",
                "refs_data": (
                    b"001e# service=git-upload-pack\n00000032"
                    b"3ff25e09724aa4d86ea5bca7d5dd0399a3c8bfcf "
                    b"HEAD\n0000"
                ),
            },
        }

        tail = "info/refs?service=git-upload-pack"

        # we need to mock urllib3.PoolManager as this test will fail
        # otherwise without an active internet connection
        class PoolManagerMock:
            def __init__(self):
                self.headers = {}

            def request(self, method, url, fields=None, headers=None, redirect=True):
                base_url = url[: -len(tail)]
                redirect_base_url = test_data[base_url]["redirect_url"]
                redirect_url = redirect_base_url + tail
                headers = {
                    "Content-Type": "application/x-git-upload-pack-advertisement"
                }
                body = test_data[base_url]["refs_data"]
                # urllib3 handles automatic redirection by default
                status = 200
                request_url = redirect_url
                # simulate urllib3 behavior when redirect parameter is False
                if redirect is False:
                    request_url = url
                    if redirect_base_url != base_url:
                        body = ""
                        headers["location"] = redirect_url
                        status = 301
                return HTTPResponse(
                    body=body,
                    headers=headers,
                    request_method=method,
                    request_url=request_url,
                    status=status,
                )

        pool_manager = PoolManagerMock()

        for base_url in test_data.keys():
            # instantiate HttpGitClient with mocked pool manager
            c = HttpGitClient(base_url, pool_manager=pool_manager, config=None)
            # call method that detects url redirection
            _, _, processed_url = c._discover_references(b"git-upload-pack", base_url)

            # send the same request as the method above without redirection
            resp = c.pool_manager.request("GET", base_url + tail, redirect=False)

            # check expected behavior of urllib3
            redirect_location = resp.get_redirect_location()
            if resp.status == 200:
                self.assertFalse(redirect_location)

            if redirect_location:
                # check that url redirection has been correctly detected
                self.assertEqual(processed_url, redirect_location[: -len(tail)])
            else:
                # check also the no redirection case
                self.assertEqual(processed_url, base_url)


class TCPGitClientTests(TestCase):
    def test_get_url(self):
        host = "github.com"
        path = "/jelmer/dulwich"
        c = TCPGitClient(host)

        url = c.get_url(path)
        self.assertEqual("git://github.com/jelmer/dulwich", url)

    def test_get_url_with_port(self):
        host = "github.com"
        path = "/jelmer/dulwich"
        port = 9090
        c = TCPGitClient(host, port=port)

        url = c.get_url(path)
        self.assertEqual("git://github.com:9090/jelmer/dulwich", url)


class DefaultUrllib3ManagerTest(TestCase):
    def test_no_config(self):
        manager = default_urllib3_manager(config=None)
        self.assertEqual(manager.connection_pool_kw["cert_reqs"], "CERT_REQUIRED")

    def test_config_no_proxy(self):
        import urllib3

        manager = default_urllib3_manager(config=ConfigDict())
        self.assertNotIsInstance(manager, urllib3.ProxyManager)
        self.assertIsInstance(manager, urllib3.PoolManager)

    def test_config_no_proxy_custom_cls(self):
        import urllib3

        class CustomPoolManager(urllib3.PoolManager):
            pass

        manager = default_urllib3_manager(
            config=ConfigDict(), pool_manager_cls=CustomPoolManager
        )
        self.assertIsInstance(manager, CustomPoolManager)

    def test_config_ssl(self):
        config = ConfigDict()
        config.set(b"http", b"sslVerify", b"true")
        manager = default_urllib3_manager(config=config)
        self.assertEqual(manager.connection_pool_kw["cert_reqs"], "CERT_REQUIRED")

    def test_config_no_ssl(self):
        config = ConfigDict()
        config.set(b"http", b"sslVerify", b"false")
        manager = default_urllib3_manager(config=config)
        self.assertEqual(manager.connection_pool_kw["cert_reqs"], "CERT_NONE")

    def test_config_proxy(self):
        import urllib3

        config = ConfigDict()
        config.set(b"http", b"proxy", b"http://localhost:3128/")
        manager = default_urllib3_manager(config=config)

        self.assertIsInstance(manager, urllib3.ProxyManager)
        self.assertTrue(hasattr(manager, "proxy"))
        self.assertEqual(manager.proxy.scheme, "http")
        self.assertEqual(manager.proxy.host, "localhost")
        self.assertEqual(manager.proxy.port, 3128)

    def test_environment_proxy(self):
        import urllib3

        config = ConfigDict()
        os.environ["http_proxy"] = "http://myproxy:8080"
        manager = default_urllib3_manager(config=config)
        self.assertIsInstance(manager, urllib3.ProxyManager)
        self.assertTrue(hasattr(manager, "proxy"))
        self.assertEqual(manager.proxy.scheme, "http")
        self.assertEqual(manager.proxy.host, "myproxy")
        self.assertEqual(manager.proxy.port, 8080)
        del os.environ["http_proxy"]

    def test_config_proxy_custom_cls(self):
        import urllib3

        class CustomProxyManager(urllib3.ProxyManager):
            pass

        config = ConfigDict()
        config.set(b"http", b"proxy", b"http://localhost:3128/")
        manager = default_urllib3_manager(
            config=config, proxy_manager_cls=CustomProxyManager
        )
        self.assertIsInstance(manager, CustomProxyManager)

    def test_config_no_verify_ssl(self):
        manager = default_urllib3_manager(config=None, cert_reqs="CERT_NONE")
        self.assertEqual(manager.connection_pool_kw["cert_reqs"], "CERT_NONE")


class SubprocessSSHVendorTests(TestCase):
    def setUp(self):
        # Monkey Patch client subprocess popen
        self._orig_popen = dulwich.client.subprocess.Popen
        dulwich.client.subprocess.Popen = DummyPopen

    def tearDown(self):
        dulwich.client.subprocess.Popen = self._orig_popen

    def test_run_command_dashes(self):
        vendor = SubprocessSSHVendor()
        self.assertRaises(
            StrangeHostname,
            vendor.run_command,
            "--weird-host",
            "git-clone-url",
        )

    def test_run_command_password(self):
        vendor = SubprocessSSHVendor()
        self.assertRaises(
            NotImplementedError,
            vendor.run_command,
            "host",
            "git-clone-url",
            password="12345",
        )

    def test_run_command_password_and_privkey(self):
        vendor = SubprocessSSHVendor()
        self.assertRaises(
            NotImplementedError,
            vendor.run_command,
            "host",
            "git-clone-url",
            password="12345",
            key_filename="/tmp/id_rsa",
        )

    def test_run_command_with_port_username_and_privkey(self):
        expected = [
            "ssh",
            "-x",
            "-p",
            "2200",
            "-i",
            "/tmp/id_rsa",
            "user@host",
            "git-clone-url",
        ]

        vendor = SubprocessSSHVendor()
        command = vendor.run_command(
            "host",
            "git-clone-url",
            username="user",
            port="2200",
            key_filename="/tmp/id_rsa",
        )

        args = command.proc.args

        self.assertListEqual(expected, args[0])

    def test_run_with_ssh_command(self):
        expected = [
            "/path/to/ssh",
            "-o",
            "Option=Value",
            "-x",
            "host",
            "git-clone-url",
        ]

        vendor = SubprocessSSHVendor()
        command = vendor.run_command(
            "host",
            "git-clone-url",
            ssh_command="/path/to/ssh -o Option=Value",
        )

        args = command.proc.args
        self.assertListEqual(expected, args[0])


class PLinkSSHVendorTests(TestCase):
    def setUp(self):
        # Monkey Patch client subprocess popen
        self._orig_popen = dulwich.client.subprocess.Popen
        dulwich.client.subprocess.Popen = DummyPopen

    def tearDown(self):
        dulwich.client.subprocess.Popen = self._orig_popen

    def test_run_command_dashes(self):
        vendor = PLinkSSHVendor()
        self.assertRaises(
            StrangeHostname,
            vendor.run_command,
            "--weird-host",
            "git-clone-url",
        )

    def test_run_command_password_and_privkey(self):
        vendor = PLinkSSHVendor()

        warnings.simplefilter("always", UserWarning)
        self.addCleanup(warnings.resetwarnings)
        warnings_list, restore_warnings = setup_warning_catcher()
        self.addCleanup(restore_warnings)

        command = vendor.run_command(
            "host",
            "git-clone-url",
            password="12345",
            key_filename="/tmp/id_rsa",
        )

        expected_warning = UserWarning(
            "Invoking PLink with a password exposes the password in the "
            "process list."
        )

        for w in warnings_list:
            if type(w) == type(expected_warning) and w.args == expected_warning.args:
                break
        else:
            raise AssertionError(
                "Expected warning %r not in %r" % (expected_warning, warnings_list)
            )

        args = command.proc.args

        if sys.platform == "win32":
            binary = ["plink.exe", "-ssh"]
        else:
            binary = ["plink", "-ssh"]
        expected = binary + [
            "-pw",
            "12345",
            "-i",
            "/tmp/id_rsa",
            "host",
            "git-clone-url",
        ]
        self.assertListEqual(expected, args[0])

    def test_run_command_password(self):
        if sys.platform == "win32":
            binary = ["plink.exe", "-ssh"]
        else:
            binary = ["plink", "-ssh"]
        expected = binary + ["-pw", "12345", "host", "git-clone-url"]

        vendor = PLinkSSHVendor()

        warnings.simplefilter("always", UserWarning)
        self.addCleanup(warnings.resetwarnings)
        warnings_list, restore_warnings = setup_warning_catcher()
        self.addCleanup(restore_warnings)

        command = vendor.run_command("host", "git-clone-url", password="12345")

        expected_warning = UserWarning(
            "Invoking PLink with a password exposes the password in the "
            "process list."
        )

        for w in warnings_list:
            if type(w) == type(expected_warning) and w.args == expected_warning.args:
                break
        else:
            raise AssertionError(
                "Expected warning %r not in %r" % (expected_warning, warnings_list)
            )

        args = command.proc.args

        self.assertListEqual(expected, args[0])

    def test_run_command_with_port_username_and_privkey(self):
        if sys.platform == "win32":
            binary = ["plink.exe", "-ssh"]
        else:
            binary = ["plink", "-ssh"]
        expected = binary + [
            "-P",
            "2200",
            "-i",
            "/tmp/id_rsa",
            "user@host",
            "git-clone-url",
        ]

        vendor = PLinkSSHVendor()
        command = vendor.run_command(
            "host",
            "git-clone-url",
            username="user",
            port="2200",
            key_filename="/tmp/id_rsa",
        )

        args = command.proc.args

        self.assertListEqual(expected, args[0])

    def test_run_with_ssh_command(self):
        expected = [
            "/path/to/plink",
            "-x",
            "host",
            "git-clone-url",
        ]

        vendor = SubprocessSSHVendor()
        command = vendor.run_command(
            "host",
            "git-clone-url",
            ssh_command="/path/to/plink",
        )

        args = command.proc.args
        self.assertListEqual(expected, args[0])


class RsyncUrlTests(TestCase):
    def test_simple(self):
        self.assertEqual(parse_rsync_url("foo:bar/path"), (None, "foo", "bar/path"))
        self.assertEqual(
            parse_rsync_url("user@foo:bar/path"), ("user", "foo", "bar/path")
        )

    def test_path(self):
        self.assertRaises(ValueError, parse_rsync_url, "/path")


class CheckWantsTests(TestCase):
    def test_fine(self):
        check_wants(
            [b"2f3dc7a53fb752a6961d3a56683df46d4d3bf262"],
            {b"refs/heads/blah": b"2f3dc7a53fb752a6961d3a56683df46d4d3bf262"},
        )

    def test_missing(self):
        self.assertRaises(
            InvalidWants,
            check_wants,
            [b"2f3dc7a53fb752a6961d3a56683df46d4d3bf262"],
            {b"refs/heads/blah": b"3f3dc7a53fb752a6961d3a56683df46d4d3bf262"},
        )

    def test_annotated(self):
        self.assertRaises(
            InvalidWants,
            check_wants,
            [b"2f3dc7a53fb752a6961d3a56683df46d4d3bf262"],
            {
                b"refs/heads/blah": b"3f3dc7a53fb752a6961d3a56683df46d4d3bf262",
                b"refs/heads/blah^{}": b"2f3dc7a53fb752a6961d3a56683df46d4d3bf262",
            },
        )


class FetchPackResultTests(TestCase):
    def test_eq(self):
        self.assertEqual(
            FetchPackResult(
                {b"refs/heads/master": b"2f3dc7a53fb752a6961d3a56683df46d4d3bf262"},
                {},
                b"user/agent",
            ),
            FetchPackResult(
                {b"refs/heads/master": b"2f3dc7a53fb752a6961d3a56683df46d4d3bf262"},
                {},
                b"user/agent",
            ),
        )


class GitCredentialStoreTests(TestCase):
    @classmethod
    def setUpClass(cls):
        with tempfile.NamedTemporaryFile(delete=False) as f:
            f.write(b"https://user:pass@example.org\n")
        cls.fname = f.name

    @classmethod
    def tearDownClass(cls):
        os.unlink(cls.fname)

    def test_nonmatching_scheme(self):
        self.assertEqual(
            get_credentials_from_store(b"http", b"example.org", fnames=[self.fname]),
            None,
        )

    def test_nonmatching_hostname(self):
        self.assertEqual(
            get_credentials_from_store(b"https", b"noentry.org", fnames=[self.fname]),
            None,
        )

    def test_match_without_username(self):
        self.assertEqual(
            get_credentials_from_store(b"https", b"example.org", fnames=[self.fname]),
            (b"user", b"pass"),
        )

    def test_match_with_matching_username(self):
        self.assertEqual(
            get_credentials_from_store(
                b"https", b"example.org", b"user", fnames=[self.fname]
            ),
            (b"user", b"pass"),
        )

    def test_no_match_with_nonmatching_username(self):
        self.assertEqual(
            get_credentials_from_store(
                b"https", b"example.org", b"otheruser", fnames=[self.fname]
            ),
            None,
        )


class RemoteErrorFromStderrTests(TestCase):
    def test_nothing(self):
        self.assertEqual(_remote_error_from_stderr(None), HangupException())

    def test_error_line(self):
        b = BytesIO(
            b"""\
This is some random output.
ERROR: This is the actual error
with a tail
"""
        )
        self.assertEqual(
            _remote_error_from_stderr(b),
            GitProtocolError("This is the actual error"),
        )

    def test_no_error_line(self):
        b = BytesIO(
            b"""\
This is output without an error line.
And this line is just random noise, too.
"""
        )
        self.assertEqual(
            _remote_error_from_stderr(b),
            HangupException(
                [
                    b"This is output without an error line.",
                    b"And this line is just random noise, too.",
                ]
            ),
        )
