void testWriteBytesWireFormatWithoutData() {
        setupMockConfig();
        Smb2IoctlRequest request = new Smb2IoctlRequest(mockConfig, TEST_CONTROL_CODE, TEST_FILE_ID);
        byte[] buffer = new byte[1024];

        int written = request.writeBytesWireFormat(buffer, 0);

        // Should write exactly 56 bytes (structure size without data)
        assertEquals(56, written);

        data = "<img src=\"http://example/foo.jpg\" width=\"100\" height=\"10\">";
        assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

        data = "<img src=\"http://example/foo.jpg\" width=\"400\" height=\"100\">";
        assertNull(transformer.getThumbnailUrl(responseData, getDocument(data)));

            final String queryId = data.getQueryId();
            final String highlightParams = data.getAppendHighlightParams();
            final boolean nextPage = data.isExistNextPage();
            final boolean prevPage = data.isExistPrevPage();
            final long startRecordNumber = data.getCurrentStartRecordNumber();
            final long endRecordNumber = data.getCurrentEndRecordNumber();

// getSHA256Hash returns SHA-256 hash in hex encoding of given data.
func getSHA256Hash(data []byte) string {
	return hex.EncodeToString(getSHA256Sum(data))
}

// getSHA256Hash returns SHA-256 sum of given data.
func getSHA256Sum(data []byte) []byte {
	hash := sha256.New()
	hash.Write(data)
	return hash.Sum(nil)
}

// getMD5Sum returns MD5 sum of given data.
func getMD5Sum(data []byte) []byte {
	hash := md5.New()
	hash.Write(data)

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
{
    "description": "Some data",
    "data": "aGVsbG8="
}
```

/// tip

`aGVsbG8=` 是 `hello` 的 base64 編碼。

///

接著 Pydantic 會將該 base64 字串解碼，並在模型的 `data` 欄位中提供原始位元組。

你會收到類似以下的回應：

```json
{

        ]
    }


@pytest.mark.parametrize(
    "path",
    ["/required-str", "/model-required-str"],
)
def test_required_str(path: str):
    client = TestClient(app)
    response = client.post(path, data={"p": "hello"})
    assert response.status_code == 200
    assert response.json() == {"p": "hello"}


# =====================================================================================
# Alias

    void testHasMoreElementsBecomeFalse() {
        // Set small amounts so everything fits in one message
        transaction.setParameterBytesWritten(10);
        transaction.setDataBytesWritten(10);

        // First call processes all data
        transaction.nextElement();

        // Should have no more elements since all data fit in first message

	// Create a split function that delivers a little data, then a predictable error.
	numSplits := 0
	const okCount = 7
	errorSplit := func(data []byte, atEOF bool) (advance int, token []byte, err error) {
		if atEOF {
			panic("didn't get enough data")
		}
		if numSplits >= okCount {
			return 0, nil, testError
		}
		numSplits++
		return 1, data[0:1], nil
	}
	// Read the data.
	const text = "abcdefghijklmnopqrstuvwxyz"

                final char[] data = line.toCharArray();
                int ip, i, j;
                Name name;
                NbtAddress addr;
                char c = '.';

                ip = i = 0;
                for (; i < data.length && c == '.'; i++) {
                    int b = 0x00;

                    for (; i < data.length && (c = data[i]) >= 48 && c <= 57; i++) {

                                                       items="${pathMappingItems}">
                                                <tr
                                                        data-href="${contextPath}/admin/pathmap/details/4/${f:u(data.id)}" role="button" tabindex="0">
                                                    <td>${f:h(data.regex)}</td>