feat: impl. encoding.BinaryMarshaler/Unmarshaler

binary_test.go

@@ -0,0 +1,61 @@
+/*
+ * Copyright (c) 2025 Fumiama Minamoto.
+ *
+ * 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.
+ */
+
+package blake2b
+
+import (
+	"bytes"
+	"crypto/rand"
+	"encoding"
+	"encoding/hex"
+	"testing"
+)
+
+func TestBinaryMarshalUnmarshal256(t *testing.T) {
+	buf := make([]byte, 16384)
+	rand.Read(buf)
+	var (
+		exp [32]byte
+		got [32]byte
+	)
+	for i := 0; i < 16384; i++ {
+		h := New256()
+		_, err := h.Write(buf[:i])
+		if err != nil {
+			t.Fatal(err)
+		}
+		data, err := h.(encoding.BinaryMarshaler).MarshalBinary()
+		if err != nil {
+			t.Fatal(err)
+		}
+		newh := New256()
+		err = newh.(encoding.BinaryUnmarshaler).UnmarshalBinary(data)
+		if err != nil {
+			t.Fatal(err)
+		}
+		_, err = h.Write(buf[i:])
+		if err != nil {
+			t.Fatal(err)
+		}
+		_, err = newh.Write(buf[i:])
+		if err != nil {
+			t.Fatal(err)
+		}
+		if !bytes.Equal(h.Sum(exp[:0]), newh.Sum(got[:0])) {
+			t.Fatal("Expect", hex.EncodeToString(exp[:]), "but got", hex.EncodeToString(got[:]))
+		}
+	}
+}