client = TestClient(app)
    response = client.get(f"{path}?p=hello")
    assert response.status_code == 200
    assert response.json() == {"p": None}


@pytest.mark.parametrize(
    "path",
    [
        "/optional-alias",
        "/model-optional-alias",
    ],
)
def test_optional_alias_by_alias(path: str):
    client = TestClient(app)

You can define Header parameters the same way you define `Query`, `Path` and `Cookie` parameters.

## Import `Header` { #import-header }

First import `Header`:

{* ../../docs_src/header_params/tutorial001_an_py310.py hl[3] *}

## Declare `Header` parameters { #declare-header-parameters }

Then declare the header parameters using the same structure as with `Path`, `Query` and `Cookie`.

    /**
     * Writes data to the specified file path.
     *
     * @param path the file path to write to
     * @param data the data to write
     */
    protected void write(final String path, final byte[] data) {
        validateFilePath(path);
        LdiFileUtil.write(path, data);
    }

    /**
     * Validates the file path.
     *
     * @param path the file path to validate
     */

async def read_model_required_str(p: Annotated[CookieModelRequiredStr, Cookie()]):
    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/required-str", "/model-required-str"],
)
def test_required_str_schema(path: str):
    assert app.openapi()["paths"][path]["get"]["parameters"] == snapshot(
        [
            {
                "required": True,
                "schema": {"title": "P", "type": "string"},

  )
  fun method(): String = method

  @JvmName("-deprecated_path")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "path"),
    level = DeprecationLevel.ERROR,
  )
  fun path(): String = path

  @JvmName("-deprecated_headers")
  @Deprecated(
    message = "moved to val",
    replaceWith = ReplaceWith(expression = "headers"),
    level = DeprecationLevel.ERROR,
  )

		t.Fatal(err)
	}
	if err = renameAll("", "foo", ""); err != errInvalidArgument {
		t.Fatal(err)
	}
	if err = renameAll("foo", "", ""); err != errInvalidArgument {
		t.Fatal(err)
	}
	if err = renameAll(pathJoin(path, "testvolume1"), pathJoin(path, "testvolume2"), ""); err != nil {
		t.Fatal(err)
	}

    return {"file_size": p.size}


@pytest.mark.parametrize(
    "path",
    [
        "/required-bytes",
        "/required-uploadfile",
    ],
)
def test_required_schema(path: str):
    openapi = app.openapi()
    body_model_name = get_body_model_name(openapi, path)

    assert app.openapi()["components"]["schemas"][body_model_name] == {
        "properties": {
            "p": {

                </extensions>
                """;
        Path dotMvn = cwd.resolve(".mvn");
        Files.createDirectories(dotMvn);
        Path projectExtensions = dotMvn.resolve("extensions.xml");
        Files.writeString(projectExtensions, extensionsXml);

        Path userConf = userHome.resolve(".m2");
        Files.createDirectories(userConf);
        Path userExtensions = userConf.resolve("extensions.xml");

    }

    private static MavenProperties loadPropertiesFile(Path path, boolean failIfNotFound, UnaryOperator<String> callback)
            throws IOException {
        MavenProperties configProps = new MavenProperties(null, false);
        if (Files.exists(path) || failIfNotFound) {
            configProps.load(path);
            loadIncludes(path, configProps, callback);
            trimValues(configProps);
        }

    return {"p": p.p}


@pytest.mark.parametrize(
    "path",
    ["/required-list-str", "/model-required-list-str"],
)
def test_required_list_str_schema(path: str):
    openapi = app.openapi()
    body_model_name = get_body_model_name(openapi, path)

    assert app.openapi()["components"]["schemas"][body_model_name] == {
        "properties": {
            "p": {