filePath := "testfile"

	disk, err := newLocalXLStorage(tmpDir)
	if err != nil {
		t.Fatal(err)
	}

	disk.MakeVol(t.Context(), volume)

	writer := newBitrotWriter(disk, "", volume, filePath, 35, bitrotAlgo, 10)

	_, err = writer.Write([]byte("aaaaaaaaaa"))
	if err != nil {
		t.Fatal(err)
	}
	_, err = writer.Write([]byte("aaaaaaaaaa"))
	if err != nil {
		t.Fatal(err)
	}

# Robolectric on API 36 requires JDK 21

        // Set valid data for other fields
        SMBUtil.writeInt4(100, buffer, bufferIndex + 3);
        for (int i = 7; i < 35; i++) {
            buffer[bufferIndex + i] = 0x00;
        }
        buffer[bufferIndex + 35] = 0x00;
        buffer[bufferIndex + 36] = reservedValue; // Reserved byte after setupCount

        int bytesRead = response.readParameterWordsWireFormat(buffer, bufferIndex);

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

If you check the `/docs`, they will show that the field `data` expects base64 encoded bytes:

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

        assertEquals(smbComNtTransaction.dataOffset, SmbComTransaction.readInt4(dst, 31), "dataOffset should be written correctly");
        assertEquals(smbComNtTransaction.setupCount, dst[35], "setupCount should be written correctly");
        assertEquals(smbComNtTransaction.function, SmbComTransaction.readInt2(dst, 36), "function should be written correctly");
    }

    @Test

```
Certificate:
    Data:
        Version: 3 (0x2)
        Serial Number:
            35:ac:60:46:ad:8d:de:18:dc:0b:f6:98:14:ee:89:e8
        Signature Algorithm: ED25519
        Issuer: CN = consoleAdmin
        Validity
            Not Before: Jul 19 15:08:44 2021 GMT

        // Verify data offset (4 bytes at position 31)
        assertEquals(130, SMBUtil.readInt4(dst, 31));

        // Verify setup count
        assertEquals(1, dst[35]);

        // Verify function (2 bytes at position 36)
        assertEquals(SmbComNtTransaction.NT_TRANSACT_QUERY_SECURITY_DESC, SMBUtil.readInt2(dst, 36));
    }

    @Test

        writeLittleEndianInt(baos, 10); // size
        writeLittleEndianLong(baos, 25); // Unaligned offset (not multiple of 8)
        // Add enough data to avoid array bounds issues
        while (baos.size() < 35) {
            baos.write(0);
        }
        byte[] pacData = baos.toByteArray();

        PACDecodingException e = assertThrows(PACDecodingException.class, () -> new Pac(pacData, keys));

		//    * Listing an object with a trailing slash and '/' delimiter
		34: {
			IsTruncated: false,
			Objects:     []ObjectInfo{},
		},
		// ListObjectsResult-35 list with custom uncommon delimiter
		35: {
			IsTruncated: false,
			Objects: []ObjectInfo{
				{Name: "file1/receipt.json"},
			},
			Prefixes: []string{"file1/guidSplunk"},
		},

## Pydantic `bytes` { #pydantic-bytes }

你可以宣告含有 `bytes` 欄位的 Pydantic 模型，並在模型設定中使用 `val_json_bytes`，使其在驗證輸入的 JSON 資料時使用 base64；在驗證過程中，它會將 base64 字串解碼為位元組。

{* ../../docs_src/json_base64_bytes/tutorial001_py310.py ln[1:9,29:35] hl[9] *}

如果你查看 `/docs`，會看到欄位 `data` 需要 base64 編碼的位元組：

<div class="screenshot">
<img src="/img/tutorial/json-base64-bytes/image01.png">
</div>

你可以發送如下的請求：

```json
{