}

    @Test
    public void test_complex_field_names() {
        // Test various complex field names
        String[] fieldNames = { "simple_field", "field-with-dashes", "field.with.dots", "field_with_underscores", "fieldWithCamelCase",
                "field with spaces", "field@with#special!chars", "フィールド名", "字段名称", "필드명" };

        for (String fieldName : fieldNames) {

   *
   * <ul>
   *   <li>Any part containing non-ASCII characters is considered valid.
   *   <li>Underscores ('_') are permitted wherever dashes ('-') are permitted.
   *   <li>Parts other than the final part may start with a digit, as mandated by <a
   *       href="https://tools.ietf.org/html/rfc1123#section-2">RFC 1123</a>.
   * </ul>
   *

        assertTrue(id1.length() > 0);
        assertFalse(id1.contains("-"));
    }

    @Test
    public void test_generateId_format() {
        String id = queryHelper.generateId();
        // UUID without dashes should be 32 characters
        assertEquals(32, id.length());
        assertTrue(id.matches("[a-f0-9]{32}"));
    }

    @Test
    public void test_addDefaultSort_singleField() {

Então, o invasor não poderá tentar usar essas senhas em outro sistema (como muitos usuários utilizam a mesma senha em vários lugares, isso seria perigoso).

## Instalar o `pwdlib` { #install-pwdlib }

pwdlib é um excelente pacote Python para lidar com hashes de senhas.

        original_header_info = original_header_permalinks[header_no]

        if header_info["hashes"] != original_header_info["hashes"]:
            raise ValueError(
                "Header levels do not match between document and original document"
                f" (found {header_info['hashes']}, expected {original_header_info['hashes']})"
                f" for header №{header_no + 1} in line {header_info['line_no']}"
            )

    assertThrows(IllegalStateException.class, () -> hasher.putInt(42));
  }

  public void testHashTwice() {
    Hasher hasher = sha512().newHasher();

    assertThat(
            hasher
                .putString("The quick brown fox jumps over the lazy dog", UTF_8)
                .hash()
                .toString())

/**
 * {@link LoadingCache} tests that deal with empty caches.
 *
 * @author mike nonemacher
 */

@NullUnmarked
public class EmptyCachesTest extends TestCase {

  public void testEmpty() {
    for (LoadingCache<Object, Object> cache : caches()) {
      checkEmpty(cache);
    }
  }


  public void testInvalidate_empty() {
    for (LoadingCache<Object, Object> cache : caches()) {
      cache.getUnchecked("a");

        .isEqualTo(InetAddresses.forString("0.0.0.0"));

    // test compat address (should be hashed)
    assertThat(InetAddresses.getCoercedIPv4Address(InetAddresses.forString("::1.2.3.4")))
        .isNotEqualTo(InetAddresses.forString("1.2.3.4"));

    // test 6to4 address (should be hashed)
    assertThat(InetAddresses.getCoercedIPv4Address(InetAddresses.forString("2002:0102:0304::1")))

Der Dieb kann also nicht versuchen, die gleichen Passwörter in einem anderen System zu verwenden (da viele Benutzer überall das gleiche Passwort verwenden, wäre dies gefährlich).

## `pwdlib` installieren { #install-pwdlib }

pwdlib ist ein großartiges Python-Package, um Passwort-Hashes zu handhaben.

Siempre que pases exactamente el mismo contenido (exactamente la misma contraseña) obtienes exactamente el mismo galimatías.

Pero no puedes convertir del galimatías de nuevo a la contraseña.

### Por qué usar hashing de contraseñas { #why-use-password-hashing }

Si tu base de datos es robada, el ladrón no tendrá las contraseñas en texto claro de tus usuarios, solo los hashes.