assertEquals(
        "a&quot;b&lt;c&gt;d&amp;e&quot;f&apos;", xmlAttributeEscaper.escape("a\"b<c>d&e\"f'"));
    // Test '\t', '\n' and '\r' are escaped.
    assertEquals("a&#x9;b&#xA;c&#xD;d", xmlAttributeEscaper.escape("a\tb\nc\rd"));
  }

  // Helper to assert common properties of xml escapers.
  static void assertBasicXmlEscaper(
      CharEscaper xmlEscaper, boolean shouldEscapeQuotes, boolean shouldEscapeWhitespaceChars) {

pkg sync, method (*Map) LoadAndDelete(interface{}) (interface{}, bool)
pkg testing, method (*B) TempDir() string
pkg testing, method (*T) Deadline() (time.Time, bool)
pkg testing, method (*T) TempDir() string
pkg testing, type TB interface, TempDir() string

    ```

!!! info
    👀 👈 👥 🕴 📣 1️⃣ 🔗 *➡ 🛠️ 🔢*, `query_or_cookie_extractor`.

    ✋️ **FastAPI** 🔜 💭 👈 ⚫️ ✔️ ❎ `query_extractor` 🥇, 🚶‍♀️ 🏁 👈 `query_or_cookie_extractor` ⏪ 🤙 ⚫️.

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```

## ⚙️ 🎏 🔗 💗 🕰

!!! tip
    👆 🔜 👀 ⚫️❔ 🎏 "👜", ↖️ ⚪️➡️ 🔢, 💪 ⚙️ 🔗 ⏭ 📃.

🕐❔ 🆕 📨 🛬, **FastAPI** 🔜 ✊ 💅:

* 🤙 👆 🔗 ("☑") 🔢 ⏮️ ☑ 🔢.
* 🤚 🏁 ⚪️➡️ 👆 🔢.
* 🛠️ 👈 🏁 🔢 👆 *➡ 🛠️ 🔢*.

```mermaid
graph TB

common_parameters(["common_parameters"])
read_items["/items/"]
read_users["/users/"]

common_parameters --> read_items
common_parameters --> read_users
```

			}
		}
		if should < 10 {
			t.Errorf("host %q only connects to %d hosts", hosts[x], should)
		}
		t.Logf("host %q should connect to %d hosts", hosts[x], should)
	}
}

func startServer(t testing.TB, listener net.Listener, handler http.Handler) (server *httptest.Server) {
	t.Helper()
	server = httptest.NewUnstartedServer(handler)
	server.Config.Addr = listener.Addr().String()
	server.Listener = listener

* Calling your dependency ("dependable") function with the correct parameters.
* Get the result from your function.
* Assign that result to the parameter in your *path operation function*.

```mermaid
graph TB

common_parameters(["common_parameters"])
read_items["/items/"]
read_users["/users/"]

common_parameters --> read_items
common_parameters --> read_users
```

    headersBuilder.add("Content-Length", "0")
    addHeaderLenient(headersBuilder, "a\tb: c\u007fd")
    addHeaderLenient(headersBuilder, ": ef")
    addHeaderLenient(headersBuilder, "\ud83c\udf69: \u2615\ufe0f")
    val headers = headersBuilder.build()
    server.enqueue(MockResponse(headers = headers))
    executeSynchronously("/")
      .assertHeader("a\tb", "c\u007fd")
      .assertHeader("\ud83c\udf69", "\u2615\ufe0f")

!!! info "情報"
    *path operation関数*の中で宣言している依存関係は`query_or_cookie_extractor`の１つだけであることに注意してください。

    しかし、**FastAPI** は`query_extractor`を最初に解決し、その結果を`query_or_cookie_extractor`を呼び出す時に渡す必要があることを知っています。

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```

## 同じ依存関係の複数回の使用

func loadMetacacheSample(t testing.TB) *metacacheReader {
	b, err := os.ReadFile("testdata/metacache.s2")
	if err != nil {
		t.Fatal(err)
	}
	return newMetacacheReader(bytes.NewReader(b))
}

func loadMetacacheSampleEntries(t testing.TB) metaCacheEntriesSorted {
	r := loadMetacacheSample(t)
	defer r.Close()

    Aber **FastAPI** wird wissen, dass es zuerst `query_extractor` auflösen muss, um dessen Resultat `query_or_cookie_extractor` zu übergeben, wenn dieses aufgerufen wird.

```mermaid
graph TB

query_extractor(["query_extractor"])
query_or_cookie_extractor(["query_or_cookie_extractor"])

read_query["/items/"]

query_extractor --> query_or_cookie_extractor --> read_query
```