/**
   * Returns all nodes in this graph adjacent to {@code node} which can be reached by traversing
   * {@code node}'s incoming edges <i>against</i> the direction (if any) of the edge.
   *
   * <p>Some algorithms that operate on a {@code PredecessorsFunction} may produce undesired results
   * if the returned {@link Iterable} contains duplicate elements. Implementations of such
   * algorithms should document their behavior in the presence of duplicates.

   *
   * <p>This is <i>not</i> the same as "all nodes reachable from {@code node} by following outgoing
   * edges". For that functionality, see {@link Graphs#reachableNodes(Graph, Object)}.
   *
   * <p>Some algorithms that operate on a {@code SuccessorsFunction} may produce undesired results
   * if the returned {@link Iterable} contains duplicate elements. Implementations of such
   * algorithms should document their behavior in the presence of duplicates.

Veamos cómo podemos hacer que esto funcione.

## pytest.mark.anyio

Si queremos llamar funciones asíncronas en nuestros tests, nuestras funciones de test tienen que ser asíncronas. AnyIO proporciona un plugin útil para esto, que nos permite especificar que algunas funciones de test deben ser llamadas de manera asíncrona.

## HTTPX

        // file. Ideally, we'd do full pattern-evaluation against the sysprops, but this
        // is a first step. There are several replacements below, in order to normalize
        // the path character before we operate on the string as a regex input, and
        // in order to avoid surprises with the File construction...
        // -------------------------------------------------------------------------------------

Agora...

Aquí **FastAPI** no se confundirá porque estás usando `Depends`.

///

/// check | Revisa

El modo en que este sistema de dependencias está diseñado nos permite tener diferentes dependencias (diferentes "dependables") que todas devuelven un modelo `User`.

No estamos restringidos a tener solo una dependencia que pueda devolver ese tipo de datos.

///

## Otros modelos

   * Asserts that an escaper behaves correctly with respect to null inputs.
   *
   * @param escaper the non-null escaper to test
   */
  public static void assertBasic(Escaper escaper) throws IOException {
    // Escapers operate on characters: no characters, no escaping.
    Assert.assertEquals("", escaper.escape(""));
    // Assert that escapers throw null pointer exceptions.
    try {
      escaper.escape((String) null);

   * Asserts that an escaper behaves correctly with respect to null inputs.
   *
   * @param escaper the non-null escaper to test
   */
  public static void assertBasic(Escaper escaper) throws IOException {
    // Escapers operate on characters: no characters, no escaping.
    Assert.assertEquals("", escaper.escape(""));
    // Assert that escapers throw null pointer exceptions.
    try {
      escaper.escape((String) null);

Aparte de todas las palabras rimbombantes usadas aquí, el sistema de **Inyección de Dependencias** es bastante simple.

Solo son funciones que se ven igual que las *path operation functions*.

Pero aun así, es muy potente y te permite declarar "grafos" de dependencia anidados arbitrariamente profundos (árboles).

/// tip | Consejo

Todo esto podría no parecer tan útil con estos ejemplos simples.

}

// checkMetacacheState should be used if data is not updating.
// Should only be called if a failure occurred.
func (o listPathOptions) checkMetacacheState(ctx context.Context, rpc *peerRESTClient) error {
	// We operate on a copy...
	o.Create = false
	c, err := rpc.GetMetacacheListing(ctx, o)
	if err != nil {
		return err
	}
	cache := *c

	if cache.status == scanStateNone || cache.fileNotFound {