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#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2015 Jérémy Bobbio <lunar@debian.org>
# Copyright © 2016-2017, 2019-2020 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 struct
import pytest
import re
import subprocess
from diffoscope.comparators.cbfs import CbfsFile
from diffoscope.comparators.binary import FilesystemFile
from diffoscope.comparators.utils.specialize import specialize
from ..utils.data import data, get_data
from ..utils.tools import skip_unless_tools_exist
from ..utils.nonexisting import assert_non_existing
TEST_FILE1_PATH = data("text_ascii1")
TEST_FILE2_PATH = data("text_ascii2")
@pytest.fixture
def rom1(tmpdir):
path = str(tmpdir.join("coreboot1"))
subprocess.check_call(
("cbfstool", path, "create", "-m", "x86", "-s", "32768")
)
subprocess.check_call(
(
"cbfstool",
path,
"add",
"-f",
TEST_FILE1_PATH,
"-n",
"text",
"-t",
"raw",
),
)
return specialize(FilesystemFile(path))
@pytest.fixture
def rom2(tmpdir):
size = 32768
path = str(tmpdir.join("coreboot2.rom"))
subprocess.check_call(
("cbfstool", path, "create", "-m", "x86", "-s", "%s" % size),
)
subprocess.check_call(
(
"cbfstool",
path,
"add",
"-f",
TEST_FILE2_PATH,
"-n",
"text",
"-t",
"raw",
),
shell=False,
)
# Remove the last 4 bytes to exercise the full header search
buf = bytearray(size)
with open(path, "rb") as f:
f.readinto(buf)
with open(path, "wb") as f:
size = struct.unpack_from("!I", buf, offset=len(buf) - 4 - 32 + 8)[0]
struct.pack_into("!I", buf, len(buf) - 4 - 32 + 8, size - 4)
f.write(buf[:-4])
return specialize(FilesystemFile(path))
@skip_unless_tools_exist("cbfstool")
def test_identification_using_offset(rom1):
assert isinstance(rom1, CbfsFile)
@skip_unless_tools_exist("cbfstool")
def test_identification_without_offset(rom2):
assert isinstance(rom2, CbfsFile)
@skip_unless_tools_exist("cbfstool")
def test_no_differences(rom1):
difference = rom1.compare(rom1)
assert difference is None
@pytest.fixture
def differences(rom1, rom2):
difference = rom1.compare(rom2)
return difference.details
@skip_unless_tools_exist("cbfstool")
def test_listing(differences):
# Compares outputs of: "cbfstool $tmpdir/coreboot*.rom print"
#
# As the output of this command keeps changing slightly (see
# https://salsa.debian.org/reproducible-builds/diffoscope/merge_requests/38/
# and the git log of this file), perform only these basic coherence check.
assert differences[0].source1.startswith("cbfstool")
assert re.search(r"\+text\s.*\sraw\s", differences[0].unified_diff)
@skip_unless_tools_exist("cbfstool")
def test_content(differences):
assert differences[1].source1 == "text"
assert differences[1].source2 == "text"
expected_diff = get_data("text_ascii_expected_diff")
assert differences[1].unified_diff == expected_diff
@skip_unless_tools_exist("cbfstool")
def test_compare_non_existing(monkeypatch, rom1):
assert_non_existing(monkeypatch, rom1)
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