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#
# diffoscope: in-depth comparison of files, archives, and directories
#
# Copyright © 2017, 2020, 2023 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 pytest
import subprocess
from diffoscope.config import Config
from diffoscope.comparators.image import JPEGImageFile
from diffoscope.comparators.missing_file import MissingFile
from ..utils.data import load_fixture, get_data
from ..utils.tools import skip_unless_tools_exist, skip_unless_tool_is_between
image1 = load_fixture("test1.jpg")
image2 = load_fixture("test2.jpg")
image1_meta = load_fixture("test1_meta.jpg")
image2_meta = load_fixture("test2_meta.jpg")
def identify_version():
out = subprocess.check_output(["identify", "-version"]).decode("utf-8")
# First line is expected to look like
# "Version: ImageMagick 6.9.6-6 Q16 x86_64 20161125 ..."
if not out.startswith("Version: ImageMagick "):
return "0.0.0"
return out.splitlines()[0].split()[2].strip()
def test_identification(image1):
assert isinstance(image1, JPEGImageFile)
def test_no_differences(image1):
difference = image1.compare(image1)
assert difference is None
@pytest.fixture
def differences(image1, image2):
return image1.compare(image2).details
@skip_unless_tools_exist("img2txt", "identify")
def test_diff(differences):
expected_diff = get_data("jpeg_image_expected_diff")
assert differences[0].unified_diff == expected_diff
@skip_unless_tools_exist("img2txt", "identify")
def test_compare_non_existing(monkeypatch, image1):
monkeypatch.setattr(Config(), "new_file", True)
difference = image1.compare(MissingFile("/nonexisting", image1))
assert difference.source2 == "/nonexisting"
assert len(difference.details) > 0
@pytest.fixture
def differences_meta(image1_meta, image2_meta):
return image1_meta.compare(image2_meta).details
@skip_unless_tools_exist("img2txt", "identify")
@skip_unless_tool_is_between("identify", identify_version, "6.9.6", "7.0.0")
def test_diff_meta(differences_meta):
expected_diff = get_data("jpeg_image_meta_expected_diff")
assert differences_meta[-1].unified_diff == expected_diff
@skip_unless_tools_exist("img2txt", "convert", "identify")
def test_has_visuals(monkeypatch, image1, image2):
monkeypatch.setattr(Config(), "compute_visual_diffs", True)
jpg_diff = image1.compare(image2)
assert len(jpg_diff.details) == 2
assert len(jpg_diff.details[0].visuals) == 2
assert jpg_diff.details[0].visuals[0].data_type == "image/png;base64"
assert jpg_diff.details[0].visuals[1].data_type == "image/gif;base64"
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