Added tests and no coverage pragmas

Author: davidfokkema

src/briefcase/config.py

@@ -146,14 +146,13 @@ def validate_document_type_config(document_type_id, document_type):
             f"The URL associated with document type {document_type_id!r} is invalid: {e}"
         )
 
-    if sys.platform == "darwin":
+    if sys.platform == "darwin":  # pragma: no-cover-if-not-macos
         from briefcase.platforms.macOS.utils import mime_type_to_UTI
 
         macOS = document_type.setdefault("macOS", {})
         if (UTI := mime_type_to_UTI(document_type.get("mime_type", None))) is not None:
             macOS.setdefault("LSItemContentType", UTI)
             macOS.setdefault("LSHandlerRank", "Alternate")
-            macOS.setdefault("UTTypeConformsTo", ["public.xyz"])
         else:
             # LSItemContentType will default to bundle.app_name.document_type_id
             # in the Info.plist template if it is not provided.

src/briefcase/platforms/macOS/utils.py

@@ -276,7 +276,7 @@ def merge_app_packages(
             self.console.info("No libraries require merging.")
 
 
-def mime_type_to_UTI(mime_type: str) -> str | None:
+def mime_type_to_UTI(mime_type: str) -> str | None:  # pragma: no-cover-if-not-macos
     """Convert a MIME type to a Uniform Type Identifier (UTI).
 
     This function reads the system's CoreTypes Info.plist file to determine the

tests/config/test_document_type_config.py

@@ -160,3 +160,26 @@ def test_validate_document_invalid_extension(invalid_extension, valid_document):
         match=r"The extension provided for document type .* is not alphanumeric.",
     ):
         validate_document_type_config("ext", valid_document)
+
+
+def test_document_type_macOS_config_with_mimetype_single(valid_document):
+    """Valid document types don't raise an exception when validated."""
+    valid_document["mime_type"] = "application/pdf"
+    validate_document_type_config("ext", valid_document)
+    assert "LSItemContentType" in valid_document["macOS"].keys()
+    assert valid_document["macOS"]["LSItemContentType"] == "com.adobe.pdf"
+
+
+def test_document_type_macOS_config_with_mimetype_list(valid_document):
+    """Valid document types don't raise an exception when validated."""
+    valid_document["mime_type"] = "text/vcard"
+    validate_document_type_config("ext", valid_document)
+    assert "LSItemContentType" in valid_document["macOS"].keys()
+    assert valid_document["macOS"]["LSItemContentType"] == "public.vcard"
+
+
+def test_document_type_macOS_config_with_unknown_mimetype(valid_document):
+    """Valid document types don't raise an exception when validated."""
+    valid_document["mime_type"] = "custom/mytype"
+    validate_document_type_config("ext", valid_document)
+    assert "LSItemContentType" not in valid_document["macOS"].keys()