assertFalse(future.set(23));
    assertFalse(future.setException(new Exception("bar")));
    assertFalse(future.setFuture(SettableFuture.create()));
    // Check that the future has been set properly.
    assertTrue(future.isDone());
    assertFalse(future.isCancelled());
    assertEquals(42, (int) future.get());
  }

  public void testSetException() throws Exception {

# This method is misleading, and uses lenient boolean parsing under the hood. If you intend to parse
# a system property as a boolean, use
# org.elasticsearch.core.Booleans#parseBoolean(java.lang.String) on the result of
# java.lang.SystemProperty#getProperty(java.lang.String) instead. If you were not intending to parse
# a system property as a boolean, but instead parse a string to a boolean, use

        assertEquals("Root cause", exception.getCause().getCause().getMessage());
    }

    @Test
    public void test_serialVersionUID() {
        // Test that serialVersionUID is properly set
        CommandExecutionException exception1 = new CommandExecutionException("Test");
        CommandExecutionException exception2 = new CommandExecutionException("Test");

        assertEquals(message, exception.getMessage());
        assertNull(exception.getCause());
    }

    @Test
    public void test_exceptionInheritance() {
        // Test that JobNotFoundException properly extends FessSystemException
        JobNotFoundException exception = new JobNotFoundException("test");

        assertTrue(exception instanceof FessSystemException);
        assertTrue(exception instanceof RuntimeException);

        assertSame(firstCall, secondCall);
        assertEquals(type, firstCall);
    }

    @Test
    public void test_inheritanceFromFessSystemException() {
        // Test that InvalidAccessTokenException is properly inherited from FessSystemException
        String type = "SessionToken";
        String message = "Session expired";
        InvalidAccessTokenException exception = new InvalidAccessTokenException(type, message);

        assertEquals("org.apache.lucene.queryparser.classic.ParseException: " + errorMessage, queryParseException.getMessage());
    }

    @Test
    public void test_getCause() {
        // Test that the cause is properly set and retrievable
        ParseException parseException = new ParseException("Query parsing failed");
        QueryParseException queryParseException = new QueryParseException(parseException);

        emptyGenerator.addCondition("field1", "pattern1");
        emptyGenerator.addCondition("field1", "pattern2");
        emptyGenerator.addCondition("field2", "pattern.*");

        // We can't test isTarget properly without container,
        // but we can verify conditions are added
        assertNotNull(emptyGenerator);

        // Test that multiple conditions can be added without errors

        assertNotNull(crawlerEngineClient);
    }

    // Test inheritance
    @Test
    public void test_inheritance() {
        // Test that CrawlerEngineClient is properly inherited
        assertTrue(crawlerEngineClient instanceof org.codelibs.fess.crawler.client.FesenClient);
    }

    // Test multiple instances
    @Test
    public void test_multipleInstances() {

                assertEquals(0, closeMethod.getParameterCount());
                assertEquals(void.class, closeMethod.getReturnType());
            }, "close() method should be properly defined");
        }

        @Test
        @DisplayName("Should allow close method to be called multiple times")
        void shouldAllowMultipleCloseCallsOnMock() throws Exception {

        generator = new TestThumbnailGenerator();
        Map<String, Object> docMap = new HashMap<>();
        docMap.put("id", "doc123");

        // Since createTask depends on FessConfig, it may not work properly
        // in unit tests without full container
        try {
            generator.createTask("/path/to/thumb.jpg", docMap);
        } catch (Exception e) {
            // Expected when FessConfig is not available