*/
    private CharUtil() {
    }

    /**
     * Checks if the given character is a valid URL character.
     *
     * Valid URL characters include:
     * - Lowercase letters (a-z)
     * - Uppercase letters (A-Z)
     * - Digits (0-9)
     * - Special characters: . - * _ : / + % = & ? # [ ] @ ~ ! $ ' ( ) , ;
     *
     * @param c the character to check

        assertEquals("オオサカ", ((TestAnalyzeToken) tokens.get(1)).getReading());
    }

    @Test
    public void testAnalyzeAndReadingWithMixedContent() {
        // Test analyzeAndReading with mixed content (numbers, letters, special chars)
        String text = "Test123 ABC-456";
        String field = "content";
        String lang = "en";

        List<AnalyzeToken> tokens = analyzer.analyzeAndReading(text, field, lang);

        assertNotNull(settings);
        // Verify that the settings object was created with the correct parameters
        // Note: We can't directly verify internal state of SuggestSettings without getters,
        // but we can verify it was created successfully
    }

    @Test
    public void testBuildWithCustomSettings() {
        // Test building with all custom settings
        String id = "custom-id";

        assertNotNull(suggestItem);
        assertEquals(Float.MAX_VALUE, suggestItem.getUserBoost(), 0.001f);
    }

    @Test
    public void testGettersWithMutableLists() {
        // Test that getters return the same list references
        String word = "mutable test";
        float boost = 1.0f;
        List<String> readings = new ArrayList<>();
        readings.add("reading1");

        TestResponseProcessor processor = new TestResponseProcessor();
        rule.responseProcessor = processor;
        rule.crawlerContainer = container;

        // Verify through getters
        assertEquals("directFieldAccess", rule.getRuleId());
        assertSame(processor, rule.getResponseProcessor());
        assertSame(container, rule.crawlerContainer);