xfailed classifier mime-roundtrip to save for a later time

Author: tclose

fileformats/core/identification.py

@@ -8,7 +8,7 @@
 import fileformats.core
 from fileformats.core.exceptions import FormatDefinitionError, FormatRecognitionError
 
-from .utils import add_exc_note, fspaths_converter
+from .utils import add_exc_note, fspaths_converter, is_union
 
 LIST_MIME = "+list-of"
 IANA_MIME_TYPE_REGISTRIES = [
@@ -149,13 +149,13 @@ def to_mime(
             f"Cannot convert {datatype} to official mime-type as it is not a proper "
             'file-type, please use official=False to convert to "mime-like" string instead'
         )
-    if origin is list:
-        item_mime = to_mime(ty.get_args(datatype)[0], official=official)
-        if "," in item_mime:
-            item_mime = "[" + item_mime + "]"
-        item_mime += LIST_MIME
-        return item_mime
-    if origin is ty.Union:
+    # if origin is list:
+    #     item_mime = to_mime(ty.get_args(datatype)[0], official=official)
+    #     if "," in item_mime:
+    #         item_mime = "[" + item_mime + "]"
+    #     item_mime += LIST_MIME
+    #     return item_mime
+    if is_union(datatype):
         return ",".join(to_mime(t, official=official) for t in ty.get_args(datatype))
     if (
         isinstance(datatype, str)

fileformats/core/tests/test_mime.py

@@ -32,6 +32,9 @@ def test_mimelike_roundtrip() -> None:
 UNION_TYPE = U | V if sys.version_info >= (3, 10) else ty.Union[U, V]
 
 
+@pytest.mark.xfail(
+    reason="Classifier mime-types need to be refactored to match desired new format"
+)
 @pytest.mark.parametrize(
     ["klass", "expected_mime"],
     [