- Fix the log verbosity level of some non-error logs that were incorrectly logged at error level ([#136046](https://github.com/kubernetes/kubernetes/pull/136046), [@Tanner-Gladson](https://github.com/Tanner-Gladson)) [SIG API Machinery and Apps]

    assertEquals(20, getDone(faultTolerantFuture).intValue());
    fallback.verifyCallCount(1);
  }

  @J2ktIncompatible
  @GwtIncompatible // non-Throwable exceptionType
  public void testCatchingAsync_inputCancelledWithoutFallback() throws Exception {
    AsyncFunction<Throwable, Integer> fallback = unexpectedAsyncFunction();

    assertEquals(20, getDone(faultTolerantFuture).intValue());
    fallback.verifyCallCount(1);
  }

  @J2ktIncompatible
  @GwtIncompatible // non-Throwable exceptionType
  public void testCatchingAsync_inputCancelledWithoutFallback() throws Exception {
    AsyncFunction<Throwable, Integer> fallback = unexpectedAsyncFunction();

   * chain:
   *
   * <pre>
   * Iterables.filter(Throwables.getCausalChain(e), IOException.class));
   * </pre>
   *
   * @param throwable the non-null {@code Throwable} to extract causes from
   * @return an unmodifiable list containing the cause chain starting with {@code throwable}
   * @throws IllegalArgumentException if there is a loop in the causal chain
   */

            String name = parser.getAttributeName(i);
            String value = parser.getAttributeValue(i);

            if (name.indexOf(':') >= 0) {
                // just ignore attributes with non-default namespace (for example: xmlns:xsi)
            } else {
                checkUnknownAttribute(parser, name, tagName, strict);
            }
        }

Before starting to work on a feature or a bug fix, please open an issue to discuss the use case or bug with us, or post a comment in the relevant issue. 
This can save everyone a lot of time and frustration.

For any non-trivial change, we need to be able to answer these questions:

* Why is this change done? What's the use case?
* For user-facing features, what will the API look like?
* What test cases should it have? What could go wrong?

    }

    @Test
    @DisplayName("available() on SMB1 returns reported available when connected")
    void available_smb1_connected() throws Exception {
        // Verify SMB1 path: non-disconnected status returns 'available' from response
        SmbPipeInputStream stream = newStreamWithInit(false);

        when(handle.ensureOpen()).thenReturn(fd);
        when(fd.getTree()).thenReturn(tree);

   */
  protected abstract Map<K, V> makeEmptyMap() throws UnsupportedOperationException;

  /**
   * Creates a new, non-empty instance of the class under test.
   *
   * @return a new, non-empty map instance.
   * @throws UnsupportedOperationException if it's not possible to make a non-empty instance of the
   *     class under test.
   */
  protected abstract Map<K, V> makePopulatedMap() throws UnsupportedOperationException;

    assertEquals(Country.CANADA, bimap.get(Currency.DOLLAR));
    assertEquals(Currency.DOLLAR, bimap.inverse().get(Country.CANADA));
  }

  public void testCreateFromMap() {
    /* Test with non-empty Map. */
    Map<Currency, Country> map =
        ImmutableMap.of(
            Currency.DOLLAR, Country.CANADA,
            Currency.PESO, Country.CHILE,
            Currency.FRANC, Country.SWITZERLAND);

        assertEquals(1, param.getValues().length);
        assertEquals("onlyValue", param.getValues()[0]);
    }

    @Test
    public void test_constructor_withNullAndNonNullValues() {
        // Test with mix of null and non-null values
        String name = "mixedParam";
        String[] values = { "value1", null, "value3", null };
        RequestParameter param = new RequestParameter(name, values);