Fix all test failures introduced in SHA256 branch

tests/compat/test_pack.py

@@ -232,16 +232,16 @@ class TestPackIndexCompat(PackTests):
 
         v3_path = os.path.join(self._tempdir, "v3_test.idx")
         with GitFile(v3_path, "wb") as f:
-            write_pack_index_v3(f, entries, b"x" * 20, hash_algorithm=1)
+            write_pack_index_v3(f, entries, b"x" * 20, object_format=1)
 
         # Load and verify structure
         idx = load_pack_index(v3_path)
         self.assertIsInstance(idx, PackIndex3)
         self.assertEqual(idx.version, 3)
-        self.assertEqual(idx.hash_algorithm, 1)  # SHA-1
+        self.assertEqual(idx.object_format, 1)  # SHA-1
         self.assertEqual(idx.hash_size, 20)
 
         # Verify SHA-256 would raise NotImplementedError
         with self.assertRaises(NotImplementedError):
             with GitFile(v3_path + ".sha256", "wb") as f:
-                write_pack_index_v3(f, entries, b"x" * 32, hash_algorithm=2)
+                write_pack_index_v3(f, entries, b"x" * 32, object_format=2)

tests/compat/test_sha256_packs.py

@@ -77,7 +77,7 @@ class GitSHA256PackCompatibilityTests(CompatTestCase):
             # Load pack index with SHA256 algorithm
             with open(idx_path, "rb") as f:
                 pack_idx = load_pack_index_file(
-                    idx_path, f, hash_algorithm=repo.object_format
+                    idx_path, f, object_format=repo.object_format
                 )
 
             # Verify it's detected as SHA256
@@ -195,7 +195,7 @@ class GitSHA256PackCompatibilityTests(CompatTestCase):
             idx_path = os.path.join(pack_dir, idx_file)
             with open(idx_path, "rb") as f:
                 pack_idx = load_pack_index_file(
-                    idx_path, f, hash_algorithm=repo.object_format
+                    idx_path, f, object_format=repo.object_format
                 )
 
             # Verify it's v1 with SHA256

tests/test_pack.py

@@ -1105,7 +1105,7 @@ class TestPackIndexWritingv3(TestCase, BaseTestFilePackIndexWriting):
         idx = load_pack_index(filename)
         self.assertIsInstance(idx, PackIndex3)
         self.assertEqual(idx.version, 3)
-        self.assertEqual(idx.hash_algorithm, 1)  # SHA-1
+        self.assertEqual(idx.object_format, 1)  # SHA-1
         self.assertEqual(idx.hash_size, 20)
         self.assertEqual(idx.shortened_oid_len, 20)
 
@@ -1115,9 +1115,9 @@ class TestPackIndexWritingv3(TestCase, BaseTestFilePackIndexWriting):
         filename = os.path.join(self.tempdir, "test_hash.idx")
         # Write v3 index with SHA-1 (algorithm=1)
         with GitFile(filename, "wb") as f:
-            write_pack_index_v3(f, entries, b"1" * 20, hash_algorithm=1)
+            write_pack_index_v3(f, entries, b"1" * 20, object_format=1)
         idx = load_pack_index(filename)
-        self.assertEqual(idx.hash_algorithm, 1)
+        self.assertEqual(idx.object_format, 1)
         self.assertEqual(idx.hash_size, 20)
 
     def test_v3_sha256_length(self) -> None:
@@ -1128,7 +1128,7 @@ class TestPackIndexWritingv3(TestCase, BaseTestFilePackIndexWriting):
         # SHA-256 should raise NotImplementedError
         with self.assertRaises(NotImplementedError) as cm:
             with GitFile(filename, "wb") as f:
-                write_pack_index_v3(f, entries, b"1" * 32, hash_algorithm=2)
+                write_pack_index_v3(f, entries, b"1" * 32, object_format=2)
         self.assertIn("SHA-256", str(cm.exception))
 
     def test_v3_invalid_hash_algorithm(self) -> None:
@@ -1138,7 +1138,7 @@ class TestPackIndexWritingv3(TestCase, BaseTestFilePackIndexWriting):
         # Invalid hash algorithm should raise ValueError
         with self.assertRaises(ValueError) as cm:
             with GitFile(filename, "wb") as f:
-                write_pack_index_v3(f, entries, b"1" * 20, hash_algorithm=99)
+                write_pack_index_v3(f, entries, b"1" * 20, object_format=99)
         self.assertIn("Unknown hash algorithm", str(cm.exception))
 
     def test_v3_wrong_hash_length(self) -> None:
@@ -1148,7 +1148,7 @@ class TestPackIndexWritingv3(TestCase, BaseTestFilePackIndexWriting):
         filename = os.path.join(self.tempdir, "test_wrong_len.idx")
         with self.assertRaises(ValueError) as cm:
             with GitFile(filename, "wb") as f:
-                write_pack_index_v3(f, entries, b"1" * 20, hash_algorithm=1)
+                write_pack_index_v3(f, entries, b"1" * 20, object_format=1)
         self.assertIn("wrong length", str(cm.exception))
 
 
@@ -1779,7 +1779,7 @@ class DeltaChainIteratorTests(TestCase):
             # Attempting to open this REF_DELTA object would loop forever
             pack[b1.id]
         except UnresolvedDeltas as e:
-            self.assertEqual([hex_to_sha(b1.id)], e.shas)
+            self.assertEqual(b1.id, e.shas)
 
 
 class DeltaEncodeSizeTests(TestCase):