Add a validator to Distribution.from_name

importlib_metadata/__init__.py

@@ -29,6 +29,8 @@
 from importlib import import_module
 from importlib.abc import MetaPathFinder
 from itertools import starmap
+from pydantic import Field, validate_arguments
+from pydantic.typing import Annotated
 from typing import List, Mapping, Optional, Union
 
 
@@ -548,7 +550,8 @@ def locate_file(self, path):
         """
 
     @classmethod
-    def from_name(cls, name):
+    @validate_arguments
+    def from_name(cls, name: Annotated[str, Field(min_length=1)]):
         """Return the Distribution for the given package name.
 
         :param name: The name of the distribution package to search for.

setup.cfg

@@ -19,6 +19,7 @@ python_requires = >=3.7
 install_requires =
 	zipp>=0.5
 	typing-extensions>=3.6.4; python_version < "3.8"
+	pydantic
 
 [options.packages.find]
 exclude =

tests/test_main.py

@@ -1,7 +1,6 @@
 import re
 import json
 import pickle
-import pytest
 import unittest
 import warnings
 import importlib
@@ -51,7 +50,6 @@ def test_new_style_classes(self):
         self.assertIsInstance(Distribution, type)
         self.assertIsInstance(MetadataPathFinder, type)
 
-    @pytest.mark.xfail(reason="Not implemented")
     @fixtures.parameterize(
         dict(name=None),
         dict(name=''),