Make get_digests() emit a DeprecationWarning

Author: jwodder

src/pypi_simple/classes.py

@@ -1,6 +1,7 @@
 import re
 from typing import Any, Dict, List, NamedTuple, Optional, Union
 from urllib.parse import urlparse, urlunparse
+from warnings import warn
 from .filenames import parse_filename
 from .util import basejoin
 
@@ -144,6 +145,11 @@ def get_digests(self) -> Dict[str, str]:
 
             Use `digests` instead
         """
+        warn(
+            "The get_digests() method is deprecated.  Use the `digests`"
+            " attribute instead.",
+            DeprecationWarning,
+        )
         return self.digests
 
     @classmethod

test/test_distrib_pkg.py

@@ -34,6 +34,8 @@ def test_from_link_digests() -> None:
     assert pkg.digests == {
         "sha256": "da69d28dcd527c0e372b3fa7b92fc333b327f8470175f035abc4e351b539189f"
     }
+    with pytest.deprecated_call():
+        assert pkg.get_digests() is pkg.digests
 
 
 @pytest.mark.parametrize("has_sig", [True, False])