from __future__ import annotations import io import re from typing import Callable import pytest from PIL import features from .helper import skip_unless_feature try: from PIL import _webp except ImportError: pass def test_check() -> None: # Check the correctness of the convenience function for module in features.modules: assert features.check_module(module) == features.check(module) for codec in features.codecs: assert features.check_codec(codec) == features.check(codec) for feature in features.features: assert features.check_feature(feature) == features.check(feature) def test_version() -> None: # Check the correctness of the convenience function # and the format of version numbers def test(name: str, function: Callable[[str], bool]) -> None: version = features.version(name) if not features.check(name): assert version is None else: assert function(name) == version if name != "PIL": assert version is None or re.search(r"\d+(\.\d+)*$", version) for module in features.modules: test(module, features.version_module) for codec in features.codecs: test(codec, features.version_codec) for feature in features.features: test(feature, features.version_feature) @skip_unless_feature("webp") def test_webp_transparency() -> None: assert features.check("transp_webp") != _webp.WebPDecoderBuggyAlpha() assert features.check("transp_webp") == _webp.HAVE_TRANSPARENCY @skip_unless_feature("webp") def test_webp_mux() -> None: assert features.check("webp_mux") == _webp.HAVE_WEBPMUX @skip_unless_feature("webp") def test_webp_anim() -> None: assert features.check("webp_anim") == _webp.HAVE_WEBPANIM @skip_unless_feature("libjpeg_turbo") def test_libjpeg_turbo_version() -> None: assert re.search(r"\d+\.\d+\.\d+$", features.version("libjpeg_turbo")) @skip_unless_feature("libimagequant") def test_libimagequant_version() -> None: assert re.search(r"\d+\.\d+\.\d+$", features.version("libimagequant")) @pytest.mark.parametrize("feature", features.modules) def test_check_modules(feature: str) -> None: assert features.check_module(feature) in [True, False] @pytest.mark.parametrize("feature", features.codecs) def test_check_codecs(feature: str) -> None: assert features.check_codec(feature) in [True, False] def test_check_warns_on_nonexistent() -> None: with pytest.warns(UserWarning) as cm: has_feature = features.check("typo") assert has_feature is False assert str(cm[-1].message) == "Unknown feature 'typo'." def test_supported_modules() -> None: assert isinstance(features.get_supported_modules(), list) assert isinstance(features.get_supported_codecs(), list) assert isinstance(features.get_supported_features(), list) assert isinstance(features.get_supported(), list) def test_unsupported_codec() -> None: # Arrange codec = "unsupported_codec" # Act / Assert with pytest.raises(ValueError): features.check_codec(codec) with pytest.raises(ValueError): features.version_codec(codec) def test_unsupported_module() -> None: # Arrange module = "unsupported_module" # Act / Assert with pytest.raises(ValueError): features.check_module(module) with pytest.raises(ValueError): features.version_module(module) def test_pilinfo() -> None: buf = io.StringIO() features.pilinfo(buf) out = buf.getvalue() lines = out.splitlines() assert lines[0] == "-" * 68 assert lines[1].startswith("Pillow ") assert lines[2].startswith("Python ") lines = lines[3:] while lines[0].startswith(" "): lines = lines[1:] assert lines[0] == "-" * 68 assert lines[1].startswith("Python modules loaded from ") assert lines[2].startswith("Binary modules loaded from ") assert lines[3] == "-" * 68 jpeg = ( "\n" + "-" * 68 + "\n" + "JPEG image/jpeg\n" + "Extensions: .jfif, .jpe, .jpeg, .jpg\n" + "Features: open, save\n" + "-" * 68 + "\n" ) assert jpeg in out