test(alonzo): block CBOR round-trip

ledger/alonzo/block_test.go

@@ -1,7 +1,91 @@
+// Copyright 2025 Blink Labs Software
+//
+// 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 alonzo_test
 
+import (
+	"bytes"
+	"encoding/hex"
+	"strings"
+	"testing"
+
+	"github.com/blinklabs-io/gouroboros/cbor"
+	"github.com/blinklabs-io/gouroboros/ledger/alonzo"
+)
+
 // https://cexplorer.io/block/1d7974cb01cc9e3fbe9dd7594795a36b21cb1deb2f1b70a0625332c91bd7e5a7
 //
 //slot:72316767
 //hash:1d7974cb01cc9e3fbe9dd7594795a36b21cb1deb2f1b70a0625332c91bd7e5a7
 var alonzoBlockHex = "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+
+func TestAlonzoBlock_CborRoundTrip_UsingCborEncode(t *testing.T) {
+	hexStr := strings.TrimSpace(alonzoBlockHex)
+
+	// Decode the hex string into CBOR bytes
+	dataBytes, err := hex.DecodeString(hexStr)
+	if err != nil {
+		t.Fatalf(
+			"Failed to decode Alonzo block hex string into CBOR bytes: %v",
+			err,
+		)
+	}
+
+	// Deserialize CBOR bytes into AlonzoBlock struct
+	var block alonzo.AlonzoBlock
+	err = block.UnmarshalCBOR(dataBytes)
+	if err != nil {
+		t.Fatalf("Failed to unmarshal CBOR data into AlonzoBlock: %v", err)
+	}
+
+	// Re-encode using the cbor Encode function
+	encoded, err := cbor.Encode(block)
+	if err != nil {
+		t.Fatalf(
+			"Failed to marshal AlonzoBlock using custom encode function: %v",
+			err,
+		)
+	}
+	if encoded == nil || len(encoded) == 0 {
+		t.Fatal("Custom encoded CBOR from AlonzoBlock is nil or empty")
+	}
+
+	// Ensure the original and re-encoded CBOR bytes are identical
+	if !bytes.Equal(dataBytes, encoded) {
+		t.Errorf(
+			"Custom CBOR round-trip mismatch for Alonzo block\nOriginal CBOR (hex): %x\nCustom Encoded CBOR (hex): %x",
+			dataBytes,
+			encoded,
+		)
+
+		// Check from which byte it differs
+		diffIndex := -1
+		for i := 0; i < len(dataBytes) && i < len(encoded); i++ {
+			if dataBytes[i] != encoded[i] {
+				diffIndex = i
+				break
+			}
+		}
+		if diffIndex != -1 {
+			t.Logf("First mismatch at byte index: %d", diffIndex)
+			t.Logf(
+				"Original byte: 0x%02x, Re-encoded byte: 0x%02x",
+				dataBytes[diffIndex],
+				encoded[diffIndex],
+			)
+		} else {
+			t.Logf("Length mismatch: original length = %d, re-encoded length = %d", len(dataBytes), len(encoded))
+		}
+	}
+}