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# -*- coding: utf-8 -*-
#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2015 Jérémy Bobbio <lunar@debian.org>
#
# diffoscope is free software: you can redistribute it and/or modify
# it under the terms of the GNU General Public License as published by
# the Free Software Foundation, either version 3 of the License, or
# (at your option) any later version.
#
# diffoscope is distributed in the hope that it will be useful,
# but WITHOUT ANY WARRANTY; without even the implied warranty of
# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
# GNU General Public License for more details.
#
# You should have received a copy of the GNU General Public License
# along with diffoscope. If not, see <https://www.gnu.org/licenses/>.
import os.path
import pytest
import subprocess
from os import mkdir, symlink
from tempfile import TemporaryDirectory
from diffoscope.tools import tool_required
from diffoscope.exc import RequiredToolNotFound
from diffoscope.difference import Difference
from diffoscope.comparators.binary import FilesystemFile
from diffoscope.comparators.utils.file import File
from diffoscope.comparators.missing_file import MissingFile
from diffoscope.comparators.utils.compare import Xxd
from utils.data import data, init_fixture, get_data, normalize_zeros
from utils.tools import skip_unless_tools_exist
TEST_FILE1_PATH = data('binary1')
TEST_FILE2_PATH = data('binary2')
TEST_ASCII_PATH = data('text_ascii1')
TEST_UNICODE_PATH = data('text_unicode1')
TEST_ISO8859_PATH = data('text_iso8859')
binary1 = init_fixture(TEST_FILE1_PATH)
binary2 = init_fixture(TEST_FILE2_PATH)
def test_same_content(binary1):
assert binary1.has_same_content_as(binary1) is True
def test_not_same_content(binary1, binary2):
assert binary1.has_same_content_as(binary2) is False
def test_guess_file_type():
assert File.guess_file_type(TEST_FILE1_PATH) == 'data'
def test_guess_encoding_binary():
assert File.guess_encoding(TEST_FILE1_PATH) == 'binary'
def test_guess_encoding_ascii():
assert File.guess_encoding(TEST_ASCII_PATH) == 'us-ascii'
def test_guess_encoding_unicode():
assert File.guess_encoding(TEST_UNICODE_PATH) == 'utf-8'
def test_guess_encoding_iso8859():
assert File.guess_encoding(TEST_ISO8859_PATH) == 'iso-8859-1'
def test_no_differences_with_xxd(binary1):
difference = binary1.compare_bytes(binary1)
assert difference is None
@skip_unless_tools_exist('xxd')
def test_compare_with_xxd(binary1, binary2):
difference = binary1.compare_bytes(binary2)
expected_diff = get_data('binary_expected_diff')
assert normalize_zeros(difference.unified_diff) == expected_diff
def test_compare_non_existing_with_xxd(binary1):
difference = binary1.compare_bytes(MissingFile('/nonexisting', binary1))
assert difference.source2 == '/nonexisting'
@pytest.fixture
def xxd_not_found(monkeypatch):
def mock_cmdline(self):
raise RequiredToolNotFound('xxd')
monkeypatch.setattr(Xxd, 'cmdline', mock_cmdline)
def test_no_differences_without_xxd(xxd_not_found, binary1):
difference = binary1.compare_bytes(binary1)
assert difference is None
def test_compare_without_xxd(xxd_not_found, binary1, binary2):
difference = binary1.compare(binary2)
expected_diff = get_data('binary_hexdump_expected_diff')
assert difference.unified_diff == expected_diff
def test_with_compare_details():
d = Difference('diff', TEST_FILE1_PATH, TEST_FILE2_PATH, source='source')
class MockFile(FilesystemFile):
def compare_details(self, other, source=None):
return [d]
difference = MockFile(TEST_FILE1_PATH).compare(MockFile(TEST_FILE2_PATH), source='source')
assert difference.details[0] == d
@skip_unless_tools_exist('xxd')
def test_with_compare_details_and_fallback():
class MockFile(FilesystemFile):
def compare_details(self, other, source=None):
return []
difference = MockFile(TEST_FILE1_PATH).compare(MockFile(TEST_FILE2_PATH))
expected_diff = get_data('binary_expected_diff')
assert 'yet data differs' in difference.comment
assert normalize_zeros(difference.unified_diff) == expected_diff
def test_with_compare_details_and_no_actual_differences():
class MockFile(FilesystemFile):
def compare_details(self, other, source=None):
return []
difference = MockFile(TEST_FILE1_PATH).compare(MockFile(TEST_FILE1_PATH))
assert difference is None
@skip_unless_tools_exist('xxd')
def test_with_compare_details_and_failed_process():
output = 'Free Jeremy Hammond'
class MockFile(FilesystemFile):
def compare_details(self, other, source=None):
subprocess.check_output(['sh', '-c', 'echo "%s"; exit 42' % output], shell=False)
raise Exception('should not be run')
difference = MockFile(TEST_FILE1_PATH).compare(MockFile(TEST_FILE2_PATH))
expected_diff = get_data('../data/binary_expected_diff')
assert output in difference.comment
assert '42' in difference.comment
assert normalize_zeros(difference.unified_diff) == expected_diff
@skip_unless_tools_exist('xxd')
def test_with_compare_details_and_tool_not_found(monkeypatch):
monkeypatch.setattr('diffoscope.exc.RequiredToolNotFound.get_package', lambda _: 'some-package')
class MockFile(FilesystemFile):
@tool_required('nonexistent')
def compare_details(self, other, source=None):
raise Exception('should not be run')
difference = MockFile(TEST_FILE1_PATH).compare(MockFile(TEST_FILE2_PATH))
expected_diff = get_data('binary_expected_diff')
assert 'nonexistent' in difference.comment
assert 'some-package' in difference.comment
assert normalize_zeros(difference.unified_diff) == expected_diff
def test_compare_two_nonexisting_files():
file1 = MissingFile('/nonexisting1')
file2 = MissingFile('/nonexisting2')
difference = file1.compare(file2)
assert 'non-existing' in difference.comment
def test_symlink_to_dir():
# Create 2 directories, each containing sub-directory src and symbolic link dst-->src.
with TemporaryDirectory() as basepath1:
with TemporaryDirectory() as basepath2:
src1path = os.path.join(basepath1, 'src')
dst1path = os.path.join(basepath1, 'lnk')
src2path = os.path.join(basepath2, 'src')
dst2path = os.path.join(basepath2, 'lnk')
mkdir(src1path)
mkdir(src2path)
symlink(src1path, dst1path)
symlink(src2path, dst2path)
# Compare these directories' content.
file1 = FilesystemFile(basepath1)
file2 = FilesystemFile(basepath2)
assert file1.has_same_content_as(file2) is False
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