# -*- coding: utf-8 -*-
# Copyright: (c) 2019, Ansible Project
# GNU General Public License v3.0+ (see COPYING or https://www.gnu.org/licenses/gpl-3.0.txt)

# Make coding more python3-ish
from __future__ import (absolute_import, division, print_function)
__metaclass__ = type

import json
import os
import pytest
import tarfile
import uuid

from hashlib import sha256
from io import BytesIO
from units.compat.mock import MagicMock

from ansible import context
from ansible.cli.galaxy import GalaxyCLI
from ansible.errors import AnsibleError
from ansible.galaxy import api, collection, token
from ansible.module_utils._text import to_bytes, to_native, to_text
from ansible.utils import context_objects as co
from ansible.utils.display import Display
from ansible.utils.hashing import secure_hash_s


@pytest.fixture(autouse='function')
def reset_cli_args():
    co.GlobalCLIArgs._Singleton__instance = None
    yield
    co.GlobalCLIArgs._Singleton__instance = None


@pytest.fixture()
def collection_input(tmp_path_factory):
    ''' Creates a collection skeleton directory for build tests '''
    test_dir = to_text(tmp_path_factory.mktemp('test-ÅÑŚÌβŁÈ Collections Input'))
    namespace = 'ansible_namespace'
    collection = 'collection'
    skeleton = os.path.join(os.path.dirname(os.path.split(__file__)[0]), 'cli', 'test_data', 'collection_skeleton')

    galaxy_args = ['ansible-galaxy', 'collection', 'init', '%s.%s' % (namespace, collection),
                   '-c', '--init-path', test_dir, '--collection-skeleton', skeleton]
    GalaxyCLI(args=galaxy_args).run()
    collection_dir = os.path.join(test_dir, namespace, collection)
    output_dir = to_text(tmp_path_factory.mktemp('test-ÅÑŚÌβŁÈ Collections Output'))

    return collection_dir, output_dir


@pytest.fixture()
def collection_artifact(monkeypatch, tmp_path_factory):
    ''' Creates a temp collection artifact and mocked open_url instance for publishing tests '''
    mock_open = MagicMock()
    monkeypatch.setattr(collection, 'open_url', mock_open)

    mock_uuid = MagicMock()
    mock_uuid.return_value.hex = 'uuid'
    monkeypatch.setattr(uuid, 'uuid4', mock_uuid)

    tmp_path = tmp_path_factory.mktemp('test-ÅÑŚÌβŁÈ Collections')
    input_file = to_text(tmp_path / 'collection.tar.gz')

    with tarfile.open(input_file, 'w:gz') as tfile:
        b_io = BytesIO(b"\x00\x01\x02\x03")
        tar_info = tarfile.TarInfo('test')
        tar_info.size = 4
        tar_info.mode = 0o0644
        tfile.addfile(tarinfo=tar_info, fileobj=b_io)

    return input_file, mock_open


@pytest.fixture()
def galaxy_yml(request, tmp_path_factory):
    b_test_dir = to_bytes(tmp_path_factory.mktemp('test-ÅÑŚÌβŁÈ Collections'))
    b_galaxy_yml = os.path.join(b_test_dir, b'galaxy.yml')
    with open(b_galaxy_yml, 'wb') as galaxy_obj:
        galaxy_obj.write(to_bytes(request.param))

    yield b_galaxy_yml


@pytest.fixture()
def tmp_tarfile(tmp_path_factory):
    ''' Creates a temporary tar file for _extract_tar_file tests '''
    filename = u'ÅÑŚÌβŁÈ'
    temp_dir = to_bytes(tmp_path_factory.mktemp('test-%s Collections' % to_native(filename)))
    tar_file = os.path.join(temp_dir, to_bytes('%s.tar.gz' % filename))
    data = os.urandom(8)

    with tarfile.open(tar_file, 'w:gz') as tfile:
        b_io = BytesIO(data)
        tar_info = tarfile.TarInfo(filename)
        tar_info.size = len(data)
        tar_info.mode = 0o0644
        tfile.addfile(tarinfo=tar_info, fileobj=b_io)

    sha256_hash = sha256()
    sha256_hash.update(data)

    with tarfile.open(tar_file, 'r') as tfile:
        yield temp_dir, tfile, filename, sha256_hash.hexdigest()


@pytest.fixture()
def galaxy_server():
    context.CLIARGS._store = {'ignore_certs': False}
    galaxy_api = api.GalaxyAPI(None, 'test_server', 'https://galaxy.ansible.com',
                               token=token.GalaxyToken(token='key'))
    return galaxy_api


def test_build_collection_no_galaxy_yaml():
    fake_path = u'/fake/ÅÑŚÌβŁÈ/path'
    expected = to_native("The collection galaxy.yml path '%s/galaxy.yml' does not exist." % fake_path)

    with pytest.raises(AnsibleError, match=expected):
        collection.build_collection(fake_path, 'output', False)


def test_build_existing_output_file(collection_input):
    input_dir, output_dir = collection_input

    existing_output_dir = os.path.join(output_dir, 'ansible_namespace-collection-0.1.0.tar.gz')
    os.makedirs(existing_output_dir)

    expected = "The output collection artifact '%s' already exists, but is a directory - aborting" \
               % to_native(existing_output_dir)
    with pytest.raises(AnsibleError, match=expected):
        collection.build_collection(input_dir, output_dir, False)


def test_build_existing_output_without_force(collection_input):
    input_dir, output_dir = collection_input

    existing_output = os.path.join(output_dir, 'ansible_namespace-collection-0.1.0.tar.gz')
    with open(existing_output, 'w+') as out_file:
        out_file.write("random garbage")
        out_file.flush()

    expected = "The file '%s' already exists. You can use --force to re-create the collection artifact." \
               % to_native(existing_output)
    with pytest.raises(AnsibleError, match=expected):
        collection.build_collection(input_dir, output_dir, False)


def test_build_existing_output_with_force(collection_input):
    input_dir, output_dir = collection_input

    existing_output = os.path.join(output_dir, 'ansible_namespace-collection-0.1.0.tar.gz')
    with open(existing_output, 'w+') as out_file:
        out_file.write("random garbage")
        out_file.flush()

    collection.build_collection(input_dir, output_dir, True)

    # Verify the file was replaced with an actual tar file
    assert tarfile.is_tarfile(existing_output)


@pytest.mark.parametrize('galaxy_yml', [b'namespace: value: broken'], indirect=True)
def test_invalid_yaml_galaxy_file(galaxy_yml):
    expected = to_native(b"Failed to parse the galaxy.yml at '%s' with the following error:" % galaxy_yml)

    with pytest.raises(AnsibleError, match=expected):
        collection._get_galaxy_yml(galaxy_yml)


@pytest.mark.parametrize('galaxy_yml', [b'namespace: test_namespace'], indirect=True)
def test_missing_required_galaxy_key(galaxy_yml):
    expected = "The collection galaxy.yml at '%s' is missing the following mandatory keys: authors, name, " \
               "readme, version" % to_native(galaxy_yml)

    with pytest.raises(AnsibleError, match=expected):
        collection._get_galaxy_yml(galaxy_yml)


@pytest.mark.parametrize('galaxy_yml', [b"""
namespace: namespace
name: collection
authors: Jordan
version: 0.1.0
readme: README.md
invalid: value"""], indirect=True)
def test_warning_extra_keys(galaxy_yml, monkeypatch):
    display_mock = MagicMock()
    monkeypatch.setattr(Display, 'warning', display_mock)

    collection._get_galaxy_yml(galaxy_yml)

    assert display_mock.call_count == 1
    assert display_mock.call_args[0][0] == "Found unknown keys in collection galaxy.yml at '%s': invalid"\
        % to_text(galaxy_yml)


@pytest.mark.parametrize('galaxy_yml', [b"""
namespace: namespace
name: collection
authors: Jordan
version: 0.1.0
readme: README.md"""], indirect=True)
def test_defaults_galaxy_yml(galaxy_yml):
    actual = collection._get_galaxy_yml(galaxy_yml)

    assert actual['namespace'] == 'namespace'
    assert actual['name'] == 'collection'
    assert actual['authors'] == ['Jordan']
    assert actual['version'] == '0.1.0'
    assert actual['readme'] == 'README.md'
    assert actual['description'] is None
    assert actual['repository'] is None
    assert actual['documentation'] is None
    assert actual['homepage'] is None
    assert actual['issues'] is None
    assert actual['tags'] == []
    assert actual['dependencies'] == {}
    assert actual['license_ids'] == []


@pytest.mark.parametrize('galaxy_yml', [(b"""
namespace: namespace
name: collection
authors: Jordan
version: 0.1.0
readme: README.md
license: MIT"""), (b"""
namespace: namespace
name: collection
authors: Jordan
version: 0.1.0
readme: README.md
license:
- MIT""")], indirect=True)
def test_galaxy_yml_list_value(galaxy_yml):
    actual = collection._get_galaxy_yml(galaxy_yml)
    assert actual['license_ids'] == ['MIT']


def test_build_ignore_files_and_folders(collection_input, monkeypatch):
    input_dir = collection_input[0]

    mock_display = MagicMock()
    monkeypatch.setattr(Display, 'vvv', mock_display)

    git_folder = os.path.join(input_dir, '.git')
    retry_file = os.path.join(input_dir, 'ansible.retry')

    tests_folder = os.path.join(input_dir, 'tests', 'output')
    tests_output_file = os.path.join(tests_folder, 'result.txt')

    os.makedirs(git_folder)
    os.makedirs(tests_folder)

    with open(retry_file, 'w+') as ignore_file:
        ignore_file.write('random')
        ignore_file.flush()

    with open(tests_output_file, 'w+') as tests_file:
        tests_file.write('random')
        tests_file.flush()

    actual = collection._build_files_manifest(to_bytes(input_dir), 'namespace', 'collection', [])

    assert actual['format'] == 1
    for manifest_entry in actual['files']:
        assert manifest_entry['name'] not in ['.git', 'ansible.retry', 'galaxy.yml', 'tests/output', 'tests/output/result.txt']

    expected_msgs = [
        "Skipping '%s/galaxy.yml' for collection build" % to_text(input_dir),
        "Skipping '%s' for collection build" % to_text(retry_file),
        "Skipping '%s' for collection build" % to_text(git_folder),
        "Skipping '%s' for collection build" % to_text(tests_folder),
    ]
    assert mock_display.call_count == 4
    assert mock_display.mock_calls[0][1][0] in expected_msgs
    assert mock_display.mock_calls[1][1][0] in expected_msgs
    assert mock_display.mock_calls[2][1][0] in expected_msgs
    assert mock_display.mock_calls[3][1][0] in expected_msgs


def test_build_ignore_older_release_in_root(collection_input, monkeypatch):
    input_dir = collection_input[0]

    mock_display = MagicMock()
    monkeypatch.setattr(Display, 'vvv', mock_display)

    # This is expected to be ignored because it is in the root collection dir.
    release_file = os.path.join(input_dir, 'namespace-collection-0.0.0.tar.gz')

    # This is not expected to be ignored because it is not in the root collection dir.
    fake_release_file = os.path.join(input_dir, 'plugins', 'namespace-collection-0.0.0.tar.gz')

    for filename in [release_file, fake_release_file]:
        with open(filename, 'w+') as file_obj:
            file_obj.write('random')
            file_obj.flush()

    actual = collection._build_files_manifest(to_bytes(input_dir), 'namespace', 'collection', [])
    assert actual['format'] == 1

    plugin_release_found = False
    for manifest_entry in actual['files']:
        assert manifest_entry['name'] != 'namespace-collection-0.0.0.tar.gz'
        if manifest_entry['name'] == 'plugins/namespace-collection-0.0.0.tar.gz':
            plugin_release_found = True

    assert plugin_release_found

    expected_msgs = [
        "Skipping '%s/galaxy.yml' for collection build" % to_text(input_dir),
        "Skipping '%s' for collection build" % to_text(release_file)
    ]
    assert mock_display.call_count == 2
    assert mock_display.mock_calls[0][1][0] in expected_msgs
    assert mock_display.mock_calls[1][1][0] in expected_msgs


def test_build_ignore_patterns(collection_input, monkeypatch):
    input_dir = collection_input[0]

    mock_display = MagicMock()
    monkeypatch.setattr(Display, 'vvv', mock_display)

    actual = collection._build_files_manifest(to_bytes(input_dir), 'namespace', 'collection',
                                              ['*.md', 'plugins/action', 'playbooks/*.j2'])
    assert actual['format'] == 1

    expected_missing = [
        'README.md',
        'docs/My Collection.md',
        'plugins/action',
        'playbooks/templates/test.conf.j2',
        'playbooks/templates/subfolder/test.conf.j2',
    ]

    # Files or dirs that are close to a match but are not, make sure they are present
    expected_present = [
        'docs',
        'roles/common/templates/test.conf.j2',
        'roles/common/templates/subfolder/test.conf.j2',
    ]

    actual_files = [e['name'] for e in actual['files']]
    for m in expected_missing:
        assert m not in actual_files

    for p in expected_present:
        assert p in actual_files

    expected_msgs = [
        "Skipping '%s/galaxy.yml' for collection build" % to_text(input_dir),
        "Skipping '%s/README.md' for collection build" % to_text(input_dir),
        "Skipping '%s/docs/My Collection.md' for collection build" % to_text(input_dir),
        "Skipping '%s/plugins/action' for collection build" % to_text(input_dir),
        "Skipping '%s/playbooks/templates/test.conf.j2' for collection build" % to_text(input_dir),
        "Skipping '%s/playbooks/templates/subfolder/test.conf.j2' for collection build" % to_text(input_dir),
    ]
    assert mock_display.call_count == len(expected_msgs)
    assert mock_display.mock_calls[0][1][0] in expected_msgs
    assert mock_display.mock_calls[1][1][0] in expected_msgs
    assert mock_display.mock_calls[2][1][0] in expected_msgs
    assert mock_display.mock_calls[3][1][0] in expected_msgs
    assert mock_display.mock_calls[4][1][0] in expected_msgs
    assert mock_display.mock_calls[5][1][0] in expected_msgs


def test_build_ignore_symlink_target_outside_collection(collection_input, monkeypatch):
    input_dir, outside_dir = collection_input

    mock_display = MagicMock()
    monkeypatch.setattr(Display, 'warning', mock_display)

    link_path = os.path.join(input_dir, 'plugins', 'connection')
    os.symlink(outside_dir, link_path)

    actual = collection._build_files_manifest(to_bytes(input_dir), 'namespace', 'collection', [])
    for manifest_entry in actual['files']:
        assert manifest_entry['name'] != 'plugins/connection'

    assert mock_display.call_count == 1
    assert mock_display.mock_calls[0][1][0] == "Skipping '%s' as it is a symbolic link to a directory outside " \
                                               "the collection" % to_text(link_path)


def test_build_copy_symlink_target_inside_collection(collection_input):
    input_dir = collection_input[0]

    os.makedirs(os.path.join(input_dir, 'playbooks', 'roles'))
    roles_link = os.path.join(input_dir, 'playbooks', 'roles', 'linked')

    roles_target = os.path.join(input_dir, 'roles', 'linked')
    roles_target_tasks = os.path.join(roles_target, 'tasks')
    os.makedirs(roles_target_tasks)
    with open(os.path.join(roles_target_tasks, 'main.yml'), 'w+') as tasks_main:
        tasks_main.write("---\n- hosts: localhost\n  tasks:\n  - ping:")
        tasks_main.flush()

    os.symlink(roles_target, roles_link)

    actual = collection._build_files_manifest(to_bytes(input_dir), 'namespace', 'collection', [])

    linked_entries = [e for e in actual['files'] if e['name'].startswith('playbooks/roles/linked')]
    assert len(linked_entries) == 3
    assert linked_entries[0]['name'] == 'playbooks/roles/linked'
    assert linked_entries[0]['ftype'] == 'dir'
    assert linked_entries[1]['name'] == 'playbooks/roles/linked/tasks'
    assert linked_entries[1]['ftype'] == 'dir'
    assert linked_entries[2]['name'] == 'playbooks/roles/linked/tasks/main.yml'
    assert linked_entries[2]['ftype'] == 'file'
    assert linked_entries[2]['chksum_sha256'] == '9c97a1633c51796999284c62236b8d5462903664640079b80c37bf50080fcbc3'


def test_build_with_symlink_inside_collection(collection_input):
    input_dir, output_dir = collection_input

    os.makedirs(os.path.join(input_dir, 'playbooks', 'roles'))
    roles_link = os.path.join(input_dir, 'playbooks', 'roles', 'linked')
    file_link = os.path.join(input_dir, 'docs', 'README.md')

    roles_target = os.path.join(input_dir, 'roles', 'linked')
    roles_target_tasks = os.path.join(roles_target, 'tasks')
    os.makedirs(roles_target_tasks)
    with open(os.path.join(roles_target_tasks, 'main.yml'), 'w+') as tasks_main:
        tasks_main.write("---\n- hosts: localhost\n  tasks:\n  - ping:")
        tasks_main.flush()

    os.symlink(roles_target, roles_link)
    os.symlink(os.path.join(input_dir, 'README.md'), file_link)

    collection.build_collection(input_dir, output_dir, False)

    output_artifact = os.path.join(output_dir, 'ansible_namespace-collection-0.1.0.tar.gz')
    assert tarfile.is_tarfile(output_artifact)

    with tarfile.open(output_artifact, mode='r') as actual:
        members = actual.getmembers()

        linked_members = [m for m in members if m.path.startswith('playbooks/roles/linked/tasks')]
        assert len(linked_members) == 2
        assert linked_members[0].name == 'playbooks/roles/linked/tasks'
        assert linked_members[0].isdir()

        assert linked_members[1].name == 'playbooks/roles/linked/tasks/main.yml'
        assert linked_members[1].isreg()

        linked_task = actual.extractfile(linked_members[1].name)
        actual_task = secure_hash_s(linked_task.read())
        linked_task.close()

        assert actual_task == 'f4dcc52576b6c2cd8ac2832c52493881c4e54226'

        linked_file = [m for m in members if m.path == 'docs/README.md']
        assert len(linked_file) == 1
        assert linked_file[0].isreg()

        linked_file_obj = actual.extractfile(linked_file[0].name)
        actual_file = secure_hash_s(linked_file_obj.read())
        linked_file_obj.close()

        assert actual_file == '63444bfc766154e1bc7557ef6280de20d03fcd81'


def test_publish_no_wait(galaxy_server, collection_artifact, monkeypatch):
    mock_display = MagicMock()
    monkeypatch.setattr(Display, 'display', mock_display)

    artifact_path, mock_open = collection_artifact
    fake_import_uri = 'https://galaxy.server.com/api/v2/import/1234'

    mock_publish = MagicMock()
    mock_publish.return_value = fake_import_uri
    monkeypatch.setattr(galaxy_server, 'publish_collection', mock_publish)

    collection.publish_collection(artifact_path, galaxy_server, False, 0)

    assert mock_publish.call_count == 1
    assert mock_publish.mock_calls[0][1][0] == artifact_path

    assert mock_display.call_count == 1
    assert mock_display.mock_calls[0][1][0] == \
        "Collection has been pushed to the Galaxy server %s %s, not waiting until import has completed due to " \
        "--no-wait being set. Import task results can be found at %s" % (galaxy_server.name, galaxy_server.api_server,
                                                                         fake_import_uri)


def test_publish_with_wait(galaxy_server, collection_artifact, monkeypatch):
    mock_display = MagicMock()
    monkeypatch.setattr(Display, 'display', mock_display)

    artifact_path, mock_open = collection_artifact
    fake_import_uri = 'https://galaxy.server.com/api/v2/import/1234'

    mock_publish = MagicMock()
    mock_publish.return_value = fake_import_uri
    monkeypatch.setattr(galaxy_server, 'publish_collection', mock_publish)

    mock_wait = MagicMock()
    monkeypatch.setattr(galaxy_server, 'wait_import_task', mock_wait)

    collection.publish_collection(artifact_path, galaxy_server, True, 0)

    assert mock_publish.call_count == 1
    assert mock_publish.mock_calls[0][1][0] == artifact_path

    assert mock_wait.call_count == 1
    assert mock_wait.mock_calls[0][1][0] == '1234'

    assert mock_display.mock_calls[0][1][0] == "Collection has been published to the Galaxy server test_server %s" \
        % galaxy_server.api_server


def test_find_existing_collections(tmp_path_factory, monkeypatch):
    test_dir = to_text(tmp_path_factory.mktemp('test-ÅÑŚÌβŁÈ Collections'))
    collection1 = os.path.join(test_dir, 'namespace1', 'collection1')
    collection2 = os.path.join(test_dir, 'namespace2', 'collection2')
    fake_collection1 = os.path.join(test_dir, 'namespace3', 'collection3')
    fake_collection2 = os.path.join(test_dir, 'namespace4')
    os.makedirs(collection1)
    os.makedirs(collection2)
    os.makedirs(os.path.split(fake_collection1)[0])

    open(fake_collection1, 'wb+').close()
    open(fake_collection2, 'wb+').close()

    collection1_manifest = json.dumps({
        'collection_info': {
            'namespace': 'namespace1',
            'name': 'collection1',
            'version': '1.2.3',
            'authors': ['Jordan Borean'],
            'readme': 'README.md',
            'dependencies': {},
        },
        'format': 1,
    })
    with open(os.path.join(collection1, 'MANIFEST.json'), 'wb') as manifest_obj:
        manifest_obj.write(to_bytes(collection1_manifest))

    mock_warning = MagicMock()
    monkeypatch.setattr(Display, 'warning', mock_warning)

    actual = collection.find_existing_collections(test_dir)

    assert len(actual) == 2
    for actual_collection in actual:
        assert actual_collection.skip is True

        if str(actual_collection) == 'namespace1.collection1':
            assert actual_collection.namespace == 'namespace1'
            assert actual_collection.name == 'collection1'
            assert actual_collection.b_path == to_bytes(collection1)
            assert actual_collection.api is None
            assert actual_collection.versions == set(['1.2.3'])
            assert actual_collection.latest_version == '1.2.3'
            assert actual_collection.dependencies == {}
        else:
            assert actual_collection.namespace == 'namespace2'
            assert actual_collection.name == 'collection2'
            assert actual_collection.b_path == to_bytes(collection2)
            assert actual_collection.api is None
            assert actual_collection.versions == set(['*'])
            assert actual_collection.latest_version == '*'
            assert actual_collection.dependencies == {}

    assert mock_warning.call_count == 1
    assert mock_warning.mock_calls[0][1][0] == "Collection at '%s' does not have a MANIFEST.json file, cannot " \
                                               "detect version." % to_text(collection2)


def test_download_file(tmp_path_factory, monkeypatch):
    temp_dir = to_bytes(tmp_path_factory.mktemp('test-ÅÑŚÌβŁÈ Collections'))

    data = b"\x00\x01\x02\x03"
    sha256_hash = sha256()
    sha256_hash.update(data)

    mock_open = MagicMock()
    mock_open.return_value = BytesIO(data)
    monkeypatch.setattr(collection, 'open_url', mock_open)

    expected = os.path.join(temp_dir, b'file')
    actual = collection._download_file('http://google.com/file', temp_dir, sha256_hash.hexdigest(), True)

    assert actual.startswith(expected)
    assert os.path.isfile(actual)
    with open(actual, 'rb') as file_obj:
        assert file_obj.read() == data

    assert mock_open.call_count == 1
    assert mock_open.mock_calls[0][1][0] == 'http://google.com/file'


def test_download_file_hash_mismatch(tmp_path_factory, monkeypatch):
    temp_dir = to_bytes(tmp_path_factory.mktemp('test-ÅÑŚÌβŁÈ Collections'))

    data = b"\x00\x01\x02\x03"

    mock_open = MagicMock()
    mock_open.return_value = BytesIO(data)
    monkeypatch.setattr(collection, 'open_url', mock_open)

    expected = "Mismatch artifact hash with downloaded file"
    with pytest.raises(AnsibleError, match=expected):
        collection._download_file('http://google.com/file', temp_dir, 'bad', True)


def test_extract_tar_file_invalid_hash(tmp_tarfile):
    temp_dir, tfile, filename, dummy = tmp_tarfile

    expected = "Checksum mismatch for '%s' inside collection at '%s'" % (to_native(filename), to_native(tfile.name))
    with pytest.raises(AnsibleError, match=expected):
        collection._extract_tar_file(tfile, filename, temp_dir, temp_dir, "fakehash")


def test_extract_tar_file_missing_member(tmp_tarfile):
    temp_dir, tfile, dummy, dummy = tmp_tarfile

    expected = "Collection tar at '%s' does not contain the expected file 'missing'." % to_native(tfile.name)
    with pytest.raises(AnsibleError, match=expected):
        collection._extract_tar_file(tfile, 'missing', temp_dir, temp_dir)


def test_extract_tar_file_missing_parent_dir(tmp_tarfile):
    temp_dir, tfile, filename, checksum = tmp_tarfile
    output_dir = os.path.join(temp_dir, b'output')
    output_file = os.path.join(output_dir, to_bytes(filename))

    collection._extract_tar_file(tfile, filename, output_dir, temp_dir, checksum)
    os.path.isfile(output_file)