Merge pull request #8459 from radarhere/webp

Author: hugovk

Diff for: Tests/test_features.py

@@ -56,17 +56,17 @@ def test(name: str, function: Callable[[str], str | None]) -> None:
 
 def test_webp_transparency() -> None:
     with pytest.warns(DeprecationWarning):
-        assert features.check("transp_webp") == features.check_module("webp")
+        assert (features.check("transp_webp") or False) == features.check_module("webp")
 
 
 def test_webp_mux() -> None:
     with pytest.warns(DeprecationWarning):
-        assert features.check("webp_mux") == features.check_module("webp")
+        assert (features.check("webp_mux") or False) == features.check_module("webp")
 
 
 def test_webp_anim() -> None:
     with pytest.warns(DeprecationWarning):
-        assert features.check("webp_anim") == features.check_module("webp")
+        assert (features.check("webp_anim") or False) == features.check_module("webp")
 
 
 @skip_unless_feature("libjpeg_turbo")

Diff for: src/PIL/features.py

@@ -146,10 +146,11 @@ def check_feature(feature: str) -> bool | None:
 
     module, flag, ver = features[feature]
 
+    if isinstance(flag, bool):
+        deprecate(f'check_feature("{feature}")', 12)
     try:
         imported_module = __import__(module, fromlist=["PIL"])
         if isinstance(flag, bool):
-            deprecate(f'check_feature("{feature}")', 12)
             return flag
         return getattr(imported_module, flag)
     except ModuleNotFoundError: