LocalCache<Object, Object> map = makeLocalCache(builder);

      Object keyOne = new Object();
      Object valueOne = new Object();
      int hashOne = map.hash(keyOne);
      ReferenceEntry<Object, Object> entryOne = map.newEntry(keyOne, hashOne, null);
      ValueReference<Object, Object> valueRefOne = map.newValueReference(entryOne, valueOne, 1);
      assertSame(valueOne, valueRefOne.get());

      LocalCache<Object, Object> map = makeLocalCache(builder);

      Object keyOne = new Object();
      Object valueOne = new Object();
      int hashOne = map.hash(keyOne);
      ReferenceEntry<Object, Object> entryOne = map.newEntry(keyOne, hashOne, null);
      ValueReference<Object, Object> valueRefOne = map.newValueReference(entryOne, valueOne, 1);
      assertSame(valueOne, valueRefOne.get());

Und Ihre Benutzer könnten sich gleichzeitig über Ihre Django-Anwendung oder Ihre **FastAPI**-Anwendung anmelden.

///

## Die Passwörter hashen und überprüfen

Importieren Sie die benötigten Tools aus `passlib`.

Erstellen Sie einen PassLib-„Kontext“. Der wird für das Hashen und Verifizieren von Passwörtern verwendet.

/// tip | "Tipp"

# Asynchrone Tests

Sie haben bereits gesehen, wie Sie Ihre **FastAPI**-Anwendungen mit dem bereitgestellten `TestClient` testen. Bisher haben Sie nur gesehen, wie man synchrone Tests schreibt, ohne `async`hrone Funktionen zu verwenden.

Sonrasında ise projenin odağı değişti.

Geliştiricinin Starlette'e odaklanması gerekince proje de artık bir API web framework'ü olmayı bıraktı.

Artık APIStar, OpenAPI özelliklerini doğrulamak için bir dizi araç sunan bir proje haline geldi.

/// info | "Bilgi"

APIStar, aşağıdaki projeleri de üreten Tom Christie tarafından geliştirildi:

* Django REST Framework
* **FastAPI**'ın da dayandığı Starlette

It's still possible to use `BackgroundTask` alone in FastAPI, but you have to create the object in your code and return a Starlette `Response` including it.

* Sie können Metadaten aus der hochgeladenen Datei auslesen.
* Es hat eine <abbr title="dateiartig"><a href="https://docs.python.org/3/glossary.html#term-file-like-object" class="external-link" target="_blank">file-like</a></abbr> `async`hrone Schnittstelle.

  public void testBuilderReuse() {
    Builder<String, Integer> builder = new Builder<>();
    ImmutableMap<String, Integer> mapOne = builder.put("one", 1).put("two", 2).buildOrThrow();
    ImmutableMap<String, Integer> mapTwo = builder.put("three", 3).put("four", 4).buildOrThrow();

    assertMapEquals(mapOne, "one", 1, "two", 2);
    assertMapEquals(mapTwo, "one", 1, "two", 2, "three", 3, "four", 4);
  }

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