hashutil: Add sha512 support in MultiHash class

It exists use cases where sha512 checksums need to be computed (content
integrity checks for instances) so add sha512 in the list of hashing
algorithms supported by the MultiHash class.

swh/model/hashutil.py

@@ -58,7 +58,9 @@ from io import BytesIO
 import os
 from typing import Callable, Dict, Optional, Union
 
-ALGORITHMS = set(["sha1", "sha256", "sha1_git", "blake2s256", "blake2b512", "md5"])
+ALGORITHMS = set(
+    ["sha1", "sha256", "sha1_git", "blake2s256", "blake2b512", "md5", "sha512"]
+)
 """Hashing algorithms supported by this module"""
 
 DEFAULT_ALGORITHMS = set(["sha1", "sha256", "sha1_git", "blake2s256"])

swh/model/tests/test_hashutil.py

@@ -112,34 +112,44 @@ def test_multi_hash_file_bytehexdigest(hash_test_data):
     assert checksums == hash_test_data.bytehex_checksums
 
 
-def test_multi_hash_file_with_md5(hash_test_data):
+EXTRA_HASH_ALGOS = ["md5", "sha512"]
+
+
+@pytest.mark.parametrize("hash_algo", EXTRA_HASH_ALGOS)
+def test_multi_hash_file_with_extra_hash_algo(hash_test_data, hash_algo):
     fobj = io.BytesIO(hash_test_data.data)
 
     checksums = MultiHash.from_file(
-        fobj, hash_names=DEFAULT_ALGORITHMS | {"md5"}, length=len(hash_test_data.data)
+        fobj,
+        hash_names=DEFAULT_ALGORITHMS | {hash_algo},
+        length=len(hash_test_data.data),
     ).digest()
-    md5sum = {"md5": hashlib.md5(hash_test_data.data).digest()}
-    assert checksums == {**hash_test_data.checksums, **md5sum}
+    checksum = {hash_algo: hashlib.new(hash_algo, hash_test_data.data).digest()}
+    assert checksums == {**hash_test_data.checksums, **checksum}
 
 
-def test_multi_hash_file_hexdigest_with_md5(hash_test_data):
+@pytest.mark.parametrize("hash_algo", EXTRA_HASH_ALGOS)
+def test_multi_hash_file_hexdigest_with_extra_hash_algo(hash_test_data, hash_algo):
     fobj = io.BytesIO(hash_test_data.data)
     length = len(hash_test_data.data)
     checksums = MultiHash.from_file(
-        fobj, hash_names=DEFAULT_ALGORITHMS | {"md5"}, length=length
+        fobj, hash_names=DEFAULT_ALGORITHMS | {hash_algo}, length=length
     ).hexdigest()
-    md5sum = {"md5": hashlib.md5(hash_test_data.data).hexdigest()}
-    assert checksums == {**hash_test_data.hex_checksums, **md5sum}
+    checksum = {hash_algo: hashlib.new(hash_algo, hash_test_data.data).hexdigest()}
+    assert checksums == {**hash_test_data.hex_checksums, **checksum}
 
 
-def test_multi_hash_file_bytehexdigest_with_md5(hash_test_data):
+@pytest.mark.parametrize("hash_algo", EXTRA_HASH_ALGOS)
+def test_multi_hash_file_bytehexdigest_with_extra_algo(hash_test_data, hash_algo):
     fobj = io.BytesIO(hash_test_data.data)
     length = len(hash_test_data.data)
     checksums = MultiHash.from_file(
-        fobj, hash_names=DEFAULT_ALGORITHMS | {"md5"}, length=length
+        fobj, hash_names=DEFAULT_ALGORITHMS | {hash_algo}, length=length
     ).bytehexdigest()
-    md5sum = {"md5": hash_to_bytehex(hashlib.md5(hash_test_data.data).digest())}
-    assert checksums == {**hash_test_data.bytehex_checksums, **md5sum}
+    checksum = {
+        hash_algo: hash_to_bytehex(hashlib.new(hash_algo, hash_test_data.data).digest())
+    }
+    assert checksums == {**hash_test_data.bytehex_checksums, **checksum}
 
 
 def test_multi_hash_file_missing_length(hash_test_data):