}
            if (val != 0) {
                val >>>= 4;
            }
            size--;
        }
    }

    /**
     * Converts a long value to hexadecimal characters and writes them to the specified character array.
     *
     * @param val the long value to convert to hexadecimal characters
     * @param dst the destination character array to write the hex digits into

...y tener el código para las pruebas tal como antes.

## Pruebas: ejemplo extendido

Ahora extiende este ejemplo y añade más detalles para ver cómo escribir pruebas para diferentes partes.

### Archivo de aplicación **FastAPI** extendido

Continuemos con la misma estructura de archivos que antes:

```
.
├── app
│   ├── __init__.py
│   ├── main.py
│   └── test_main.py
```

import java.util.TreeMap;
import org.jspecify.annotations.Nullable;

/**
 * A wrapper around {@code TreeMap} that aggressively checks to see if keys are mutually comparable.
 * This implementation passes the navigable map test suites.
 *
 * @author Louis Wasserman
 */
@GwtIncompatible
public final class SafeTreeMap<K, V> implements Serializable, NavigableMap<K, V> {
  @SuppressWarnings("unchecked")

                } catch (IOException e) {
                    throw new CurlException("Failed to process a request.", e);
                }
            });
        }

        /**
         * Writes the content of the response to the CurlResponse.
         *
         * @param handler the input stream supplier
         */
        private void writeContent(final Supplier<InputStream> handler) {

            // Act
            int encodedSize = context.encode(buffer, 0);

            // Assert
            // Note: size() returns 4 + (2*ciphers.length) but encode only writes 2 + (2*ciphers.length)
            // This appears to be a bug in the implementation, but we test the actual behavior
            assertEquals(6, encodedSize); // actual encoded size: 2 bytes count + 2*2 bytes for ciphers

 * @param <C> the type of the container
 * @param <E> the type of the container's contents
 * @author George van den Driessche
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")
// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
@NullMarked

```Python
old_dict = {
    "old key": "old value",
    "second old key": "second old value",
}
new_dict = {**old_dict, "new key": "new value"}
```

Ici, `new_dict` contiendra toutes les paires clé-valeur de `old_dict` plus la nouvelle paire clé-valeur :

```Python
{
    "old key": "old value",
    "second old key": "second old value",
    "new key": "new value",
}
```

    // drop the contract on the method that enforces this queue like behavior since depending on it
    // is likely to be a bug anyway.

    // N.B. All writes to the list and the next pointers must have happened before the above
    // synchronized block, so we can iterate the list without the lock held here.
    RunnableExecutorPair reversedList = null;
    while (list != null) {

 *
 * @author Chris Povirk
 * @author Kevin Bourrillion
 */
@GwtCompatible
@Ignore("test runners must not instantiate and run this directly, only via suites we build")
// @Ignore affects the Android test runner, which respects JUnit 4 annotations on JUnit 3 tests.
@SuppressWarnings("JUnit4ClassUsedInJUnit3")
public class MapPutTester<K, V> extends AbstractMapTester<K, V> {

	}
	return n, err
}

// writeTo writes the content of the current file to w.
// The bytes written matches the number of remaining bytes in the current file.
//
// If the current file is sparse and w is an io.WriteSeeker,
// then writeTo uses Seek to skip past holes defined in Header.SparseHoles,
// assuming that skipped regions are filled with NULs.
// This always writes the last byte to ensure w is the right size.
//