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#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2015 Jérémy Bobbio <lunar@debian.org>
# Copyright © 2016-2020, 2022 Chris Lamb <lamby@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
import sys
import pytest
import signal
import tempfile
from diffoscope.main import main
TEST_TAR1_PATH = os.path.join(os.path.dirname(__file__), "data/test1.tar")
TEST_TAR2_PATH = os.path.join(os.path.dirname(__file__), "data/test2.tar")
TEST_TARS = (TEST_TAR1_PATH, TEST_TAR2_PATH)
def run(capsys, *args):
with pytest.raises(SystemExit) as exc:
main(args)
out, err = capsys.readouterr()
return exc.value.code, out, err
def test_non_existing_files(capsys):
ret, _, err = run(capsys, "/nonexisting1", "/nonexisting2")
assert ret == 2
assert "/nonexisting1: No such file or directory" in err
assert "/nonexisting2: No such file or directory" in err
def test_non_existing_left_with_new_file(capsys):
ret, out, _ = run(capsys, "--new-file", "/nonexisting1", __file__)
assert ret == 1
assert "--- /nonexisting1" in out
assert ("+++ %s" % __file__) in out
def test_non_existing_right_with_new_file(capsys):
ret, out, _ = run(capsys, "--new-file", __file__, "/nonexisting2")
assert ret == 1
assert ("--- %s" % __file__) in out
assert "+++ /nonexisting2" in out
def test_non_existing_files_with_new_file(capsys):
ret, out, _ = run(capsys, "--new-file", "/nonexisting1", "/nonexisting2")
assert ret == 1
assert "--- /nonexisting1" in out
assert "+++ /nonexisting2" in out
assert "Trying to compare two non-existing files." in out
def test_remove_temp_files_on_sigterm(capsys, tmpdir, monkeypatch):
pid = os.fork()
if pid == 0:
def suicide(*args):
os.kill(os.getpid(), signal.SIGTERM)
monkeypatch.setattr(
"diffoscope.comparators.text.TextFile.compare", suicide
)
tempfile.tempdir = str(tmpdir)
ret, _, _ = run(capsys, *TEST_TARS)
os._exit(ret)
else:
_, ret = os.waitpid(pid, 0)
assert (ret >> 8) == 2 # having received SIGTERM is trouble
assert os.listdir(str(tmpdir)) == []
def test_ctrl_c_handling(tmpdir, monkeypatch, capsys):
monkeypatch.setattr("tempfile.tempdir", str(tmpdir))
def interrupt(*args):
raise KeyboardInterrupt
monkeypatch.setattr(
"diffoscope.comparators.text.TextFile.compare", interrupt
)
ret, _, err = run(capsys, *TEST_TARS)
assert "" in err
assert ret == 2
assert os.listdir(str(tmpdir)) == []
def test_no_differences(capsys):
ret, out, err = run(capsys, TEST_TAR1_PATH, TEST_TAR1_PATH)
assert ret == 0
assert err == ""
assert out == ""
def test_no_differences_directories(capsys, tmpdir):
def create_dir(x):
path = str(tmpdir.mkdir(x))
os.utime(path, (0, 0)) # Ensure consistent mtime
return path
ret, out, err = run(capsys, create_dir("a"), create_dir("b"))
assert ret == 0
# if getfacl is not available there will be a warning message on stderr
# if it's available then err should be empty
assert err == "" or "getfacl" in err
assert out == ""
def test_list_tools(capsys):
ret, out, err = run(capsys, "--list-tools")
assert ret == 0
assert err == ""
assert "External-Tools-Required: " in out
assert "xxd," in out
def test_list_missing_tools(capsys):
ret, out, err = run(capsys, "--list-missing-tools")
assert ret == 0
assert err == ""
assert "External-Tools-Required: " in out
# No assertions about the contents of the output since we don't control
# what's installed in the test environment
def test_profiling(capsys):
ret, out, err = run(capsys, TEST_TAR1_PATH, TEST_TAR1_PATH, "--profile=-")
assert ret == 0
assert "Profiling output for" in out
assert err == ""
def test_non_unicode_filename(capsys, tmpdir):
# Bug reference: https://bugs.debian.org/898022
path = str(tmpdir.dirpath()).encode("utf-8")
a = os.path.join(path, b"\xf0\x28\x8c\x28")
b = os.path.join(path, b"\xf0\x28\x8c\x29")
with open(a, "w"), open(b, "w"):
pass
# sys.argv does pretty much this decoding to arguments
files = [x.decode("utf-8", errors="surrogateescape") for x in (a, b)]
ret, out, err = run(capsys, *files)
assert ret == 0
assert out == err == ""
def test_help(capsys, monkeypatch):
# Fake --help in sys.argv so that we include out file formats in the output
monkeypatch.setattr(sys, "argv", ["diffoscope", "--help"])
ret, out, err = run(capsys, "--help")
assert err == ""
assert "file formats supported:" in out
def test_usage(capsys):
ret, out, err = run(capsys, "--usage")
assert out == ""
assert "usage:" in err
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