Add unit tests for Hashed

Signed-off-by: Facundo Tuesca <[email protected]>

test/unit/test_hashes.py

@@ -0,0 +1,35 @@
+# Copyright 2024 The Sigstore Authors
+#
+# Licensed under the Apache License, Version 2.0 (the "License");
+# you may not use this file except in compliance with the License.
+# You may obtain a copy of the License at
+#
+#      http://www.apache.org/licenses/LICENSE-2.0
+#
+# Unless required by applicable law or agreed to in writing, software
+# distributed under the License is distributed on an "AS IS" BASIS,
+# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+# See the License for the specific language governing permissions and
+# limitations under the License.
+import hashlib
+
+import pytest
+from sigstore_protobuf_specs.dev.sigstore.common.v1 import HashAlgorithm
+
+from sigstore.hashes import Hashed
+
+
+class TestHashes:
+    @pytest.mark.parametrize(
+        ("algorithm", "digest"),
+        [
+            (HashAlgorithm.SHA2_256, hashlib.sha256(b"").hexdigest()),
+            (HashAlgorithm.SHA2_384, hashlib.sha384(b"").hexdigest()),
+            (HashAlgorithm.SHA2_512, hashlib.sha512(b"").hexdigest()),
+            (HashAlgorithm.SHA3_256, hashlib.sha3_256(b"").hexdigest()),
+            (HashAlgorithm.SHA3_384, hashlib.sha3_384(b"").hexdigest()),
+        ],
+    )
+    def test_hashed_repr(self, algorithm, digest):
+        hashed = Hashed(algorithm=algorithm, digest=bytes.fromhex(digest))
+        assert str(hashed) == f"{algorithm.name}:{digest}"