throws SmbException {
        if (host.indexOf('.') < 0 && host.toUpperCase(Locale.ROOT).equals(host)) {
            // this is not too good, probably should better pass the address and check that it is a netbios one.
            // While we could look up the domain controller/KDC we cannot really make the java kerberos implementation
            // use a KDC of our choice.

        assertDoesNotThrow(() -> outputStream.write(data, 0, -1)); // negative length, returns early
        assertDoesNotThrow(() -> outputStream.write(data, 0, 0)); // zero length, returns early

        // These should pass through to the underlying implementation
        assertDoesNotThrow(() -> outputStream.write(data, 0, 10)); // valid - will consume first mock (10)

        // The normalization removes all duplicate backslashes, so \\\\server becomes \server
        // This test validates that paths which should be UNC but aren't detected due to normalization
        // still pass validation (which is the current behavior, though not ideal)

        // These paths normalize to \server\share which is NOT detected as UNC due to normalization

/// check

So, with the same Python type declaration, **FastAPI** gives you data validation.

Notice that the error also clearly states exactly the point where the validation didn't pass.

This is incredibly helpful while developing and debugging code that interacts with your API.

///

## Documentation { #documentation }

Existen algunas situaciones en las que es útil poder agregar headers personalizados al error HTTP. Por ejemplo, para algunos tipos de seguridad.

Probablemente no necesitarás usarlos directamente en tu código.

Pero en caso de que los necesites para un escenario avanzado, puedes agregar headers personalizados:

{* ../../docs_src/handling_errors/tutorial002_py39.py hl[14] *}

     * - Temporarily change this test:
     * --- Comment out assertEquals.
     * --- System.out.println(input + " " + simplifyPath(input));
     * --- fail(). (If the test were to pass, its output would be hidden.)
     * - Run the test.
     * - Pull the relevant lines of output from the test into a testcases file.
     * - Test the output:
     * --- cat testcases | while read L; do

     * 1) An interface I extending Comparable<I> so that the created array is of
     * an interface type. 2) An instance of a class implementing that interface
     * so that we can pass non-null instances of the interface.
     *
     * (Currently it's safe to pass instances for which compareTo() always
     * returns 0, but if we had a SingletonImmutableSortedSet, this might no
     * longer be the case.)
     *

        assertEquals(10, ndrBuffer.getLength());

        ndrBuffer.advance(5);
        assertEquals(15, ndrBuffer.getIndex());
        assertEquals(15, ndrBuffer.getLength());

        // Advance past current length
        ndrBuffer.setLength(10);
        ndrBuffer.setIndex(10);
        ndrBuffer.advance(10);
        assertEquals(20, ndrBuffer.getIndex());

      fail("expected <" + e.getMessage() + "> to contain <" + message + ">");
    }
  }

  /**
   * Test class with valid equals and hashCode methods. Testers created with instances of this class
   * should always pass.
   */
  private static class ValidTestObject {
    private final int aspect1;
    private final int aspect2;

    ValidTestObject(int aspect1, int aspect2) {
      this.aspect1 = aspect1;

constraints.Min.message = {item} debe ser mayor o igual que {value}.
constraints.NotNull.message = {item} es obligatorio.
constraints.Null.message = {item} debe ser nulo.
constraints.Past.message = {item} debe ser una fecha pasada.
constraints.Pattern.message = {item} no coincide con "{regexp}".
constraints.Size.message = El tamaño de {item} debe estar entre {min} y {max} caracteres.