final String message = e.getMessage();
            assertNotNull("Exception message should not be null", message);
            assertFalse("Exception message should not be empty", message.trim().isEmpty());
            assertTrue("Exception message should mention 'inputstream'", message.toLowerCase().contains("inputstream"));

   *       2001:db8::1}
   * </ul>
   *
   * @throws IllegalArgumentException if the specifier is not valid.
   */
  public static HostSpecifier fromValid(String specifier) {
    // Verify that no port was specified, and strip optional brackets from
    // IPv6 literals.
    HostAndPort parsedHost = HostAndPort.fromString(specifier);
    Preconditions.checkArgument(!parsedHost.hasPort());
    String host = parsedHost.getHost();

</div>

## En Detalle { #in-detail }

El marcador `@pytest.mark.anyio` le dice a pytest que esta función de test debe ser llamada asíncronamente:

{* ../../docs_src/async_tests/app_a_py39/test_main.py hl[7] *}

/// tip | Consejo

Nota que la función de test ahora es `async def` en lugar de solo `def` como antes al usar el `TestClient`.

///

// Returns true if input is IPv6
func isIPv6(host string) bool {
	h, _, err := net.SplitHostPort(host)
	if err != nil {
		h = host
	}
	ip := net.ParseIP(h)
	return ip.To16() != nil && ip.To4() == nil
}

// strip api endpoints list with standard ports such as
// port "80" and "443" before displaying on the startup
// banner.  Returns a new list of API endpoints.

      this.sameSite = cookie.sameSite
    }

    fun name(name: String) =
      apply {
        require(name.trim() == name) { "name is not trimmed" }
        this.name = name
      }

    fun value(value: String) =
      apply {
        require(value.trim() == value) { "value is not trimmed" }
        this.value = value
      }

    fun expiresAt(expiresAt: Long) =
      apply {

                val regex = Regex("""\s*(api|implementation)\(([^)]+)\)\s*""")
                regex.find(line)?.let {
                    dependencies.add(replaceProjectDependency(line.trim()))
                }
            }
        }
        return dependencies
    }

    private fun replaceProjectDependency(line: String): String {

        if (basedir == null) {
            return path;
        }

        if (path == null) {
            return null;
        }

        path = path.trim();

        String base = basedir.getAbsolutePath();
        if (path.startsWith(base)) {
            path = chopLeadingFileSeparator(path.substring(base.length()));
        }

        if (path.isEmpty()) {

                        updater.write("# " + line);
                    }
                    continue;
                }

                final String input = m.group(1).trim();
                final String output = m.group(2).trim();

                if (input == null || output == null) {
                    logger.warn("Failed to parse stemmer override: line={}, path={}", line, path);

Und dann ruft **FastAPI** diese Überschreibung anstelle der ursprünglichen Abhängigkeit auf.

{* ../../docs_src/dependency_testing/tutorial001_an_py310.py hl[26:27,30] *}

/// tip | Tipp

Sie können eine Überschreibung für eine Abhängigkeit festlegen, die an einer beliebigen Stelle in Ihrer **FastAPI**-Anwendung verwendet wird.

E então o **FastAPI** chamará a sobreposição no lugar da dependência original.

{* ../../docs_src/dependency_testing/tutorial001_an_py310.py hl[26:27,30] *}

/// tip | Dica

Você pode definir uma sobreposição de dependência para uma dependência que é utilizada em qualquer lugar da sua aplicação **FastAPI**.