});
        // Exception is thrown, but cause may or may not be set depending on implementation
        assertNotNull(e.getMessage()); // Should have an error message
    }

    @Test
    void testGetters() {
        // Simple test for getter methods
        NtlmContext context = new NtlmContext(mockAuth, true);
        assertFalse(context.isEstablished());

        assertFalse(mockService.hasRegistration(regId));

        // 5. Verify heartbeat fails after unregistration
        assertFalse(mockService.processHeartbeat(regId, 4));
    }

    /**
     * Test error conditions and edge cases
     */
    @Test
    void testErrorConditions() {
        // Test operations on empty service
        assertEquals(0, mockService.getRegistrationCount());

      } catch (Exception | Error unsafeFailure) { // sneaky checked exception
        thrownUnsafeFailure = unsafeFailure;
        // Catch absolutely everything and fall through to AtomicReferenceFieldUpdaterAtomicHelper.
        try {
          helper = new AtomicReferenceFieldUpdaterAtomicHelper();
        } catch (Exception // sneaky checked exception
            | Error atomicReferenceFieldUpdaterFailure) {

This also means that if something changed, it will be **reflected** on the client code automatically. And if you **build** the client, it will error out if you have any **mismatch** in the data used.

Check this function, it already has type hints:

{* ../../docs_src/python_types/tutorial003.py hl[1] *}

Because the editor knows the types of the variables, you don't only get completion, you also get error checks:

<img src="/img/python-types/image04.png">

Now you know that you have to fix it, convert `age` to a string with `str(age)`:

{* ../../docs_src/python_types/tutorial004.py hl[2] *}

     * @param token the input token bytes
     * @param offset offset into the token array
     * @param len length of token data
     * @return the output token bytes
     * @throws SmbException if an error occurs during context initialization
     */
    public byte[] initSecContext(byte[] token, final int offset, final int len) throws SmbException {
        switch (state) {
        case 1:

Si abres en tu navegador una URL como:

```
http://127.0.0.1:8000/items/foo-item
```

...sin agregar el parámetro requerido `needy`, verás un error como:

```JSON
{
  "detail": [
    {
      "type": "missing",
      "loc": [
        "query",
        "needy"
      ],
      "msg": "Field required",
      "input": null
    }

        try {
            updateRepositoryMetadata(localRepository, remoteRepository);
        } catch (IOException | XMLStreamException e) {
            throw new RepositoryMetadataStoreException("Error updating group repository metadata", e);
        }
    }

    protected void updateRepositoryMetadata(ArtifactRepository localRepository, ArtifactRepository remoteRepository)

   *
   * @since 8.0
   */
  public static final byte ETB = 23;

  /**
   * Cancel: A control character used to indicate that the data with which it is sent is in error or
   * is to be disregarded.
   *
   * @since 8.0
   */
  public static final byte CAN = 24;

  /**
   * End of Medium: A control character associated with the sent data which may be used to identify

     */
    @Nullable
    XmlNode child(String name);

    /**
     * Returns the input location information for this node, if available.
     * This can be useful for error reporting and debugging.
     *
     * @return the input location object, or {@code null} if not available
     */
    @Nullable
    Object inputLocation();

    // Deprecated methods that delegate to new ones