@Test
    void testStringAndThrowableConstructor() {
        // Test the constructor with both message and cause
        String message = "Failed to connect due to timeout.";
        Throwable cause = new IllegalStateException("Network unreachable");
        ConnectionTimeoutException exception = new ConnectionTimeoutException(message, cause);
        assertEquals(message, exception.getMessage(), "Message should match the provided string");

   *
   * <p>If you only want to calculate the mean, use {@link #meanOf} instead of creating a {@link
   * Stats} instance.
   *
   * @throws IllegalStateException if the dataset is empty
   */
  public double mean() {
    checkState(count != 0);
    return mean;
  }

  /**
   * Returns the sum of the values.
   *
   * <h3>Non-finite values</h3>

          executor);
      fail();
    } catch (IllegalStateException expected2) {
    }
    try {
      ClosingFuture.whenAllComplete(asList(closingFuture));
      fail();
    } catch (IllegalStateException expected1) {
    }
    try {
      ClosingFuture.whenAllSucceed(asList(closingFuture));
      fail();
    } catch (IllegalStateException expected) {
    }
  }

            } catch (final java.io.UnsupportedEncodingException uee) {
                value = item.getString();
            } catch (final IOException e) {
                throw new IllegalStateException("Failed to get string from the item: " + item, e);
            }
            haveValue = true;
        }
        if (request instanceof final MultipartRequestWrapper wrapper) {

        void testEncodeSizeMismatch() {
            byte[] buffer = new byte[1024];
            testRequest.setTestSize(64);
            testRequest.setTestLength(128);

            IllegalStateException exception = assertThrows(IllegalStateException.class, () -> {
                testRequest.encode(buffer, 0);
            });

            assertTrue(exception.getMessage().contains("Wrong size calculation"));
        }
    }

        boundary = "simple boundary",
        source = Buffer().writeUtf8(multipart),
      )

    val partAbc = parts.nextPart()!!
    val partMno = parts.nextPart()!!

    assertFailsWith<IllegalStateException> {
      partAbc.body.request(20)
    }.also { expected ->
      assertThat(expected).hasMessage("closed")
    }

    assertThat(partMno.body.readUtf8()).isEqualTo("mnop")

          .put(ExecutionException.class, e -> e instanceof ExecutionException)
          .put(IllegalArgumentException.class, e -> e instanceof IllegalArgumentException)
          .put(IllegalStateException.class, e -> e instanceof IllegalStateException)
          .put(IndexOutOfBoundsException.class, e -> e instanceof IndexOutOfBoundsException)
          .put(NoSuchElementException.class, e -> e instanceof NoSuchElementException)

    public void testConstructorWithMessageAndCause() {
        // Create exception with both message and cause
        String message = "Transport error occurred";
        IllegalStateException rootCause = new IllegalStateException("State error");
        TransportException exception = new TransportException(message, rootCause);

        // Verify both message and cause are set correctly
        assertNotNull(exception);

  public Iterator<E> iterator() {
    if (iterator == null) {
      // TODO: throw something else? Do we worry that people's code and tests
      // might be relying on this particular type of exception?
      throw new IllegalStateException();
    }
    try {
      return iterator;
    } finally {
      iterator = null;
    }
  }

        // Test with URL, message, exception, and abort set to true
        String url = "http://example.com/test2";
        String message = "Critical error message";
        Exception cause = new IllegalStateException("Critical error");
        boolean abort = true;

        DataStoreCrawlingException exception = new DataStoreCrawlingException(url, message, cause, abort);

        assertEquals(url, exception.getUrl());