assertTrue("Character '" + c + "' should be a valid URL character", CharUtil.isUrlChar(c));
        }
    }

    public void test_isUrlChar_boundaryChars() {
        // Test boundary characters for ranges
        assertTrue(CharUtil.isUrlChar('a')); // first lowercase
        assertTrue(CharUtil.isUrlChar('z')); // last lowercase
        assertTrue(CharUtil.isUrlChar('A')); // first uppercase

1. **Isolation**: Each test is independent and doesn't affect others
2. **Clarity**: Test names clearly describe what is being tested
3. **Coverage**: Both success and failure paths are tested
4. **Edge Cases**: Null, empty, and boundary conditions are covered
5. **Resources**: Test resources are properly managed and cleaned up

## Contributing

When adding new tests:

query.highlight.tag.pre=<strong>
# Tag to use after highlighted text.
query.highlight.tag.post=</strong>
# Boundary characters for query highlighting.
query.highlight.boundary.chars=u0009u000Au0013u0020
# Maximum scan for query highlight boundaries.
query.highlight.boundary.max.scan=20
# Scanner type for query highlight boundaries.
query.highlight.boundary.scanner=chars
# Encoder type for query highlighting.
query.highlight.encoder=default

    String QUERY_HIGHLIGHT_BOUNDARY_CHARS = "query.highlight.boundary.chars";

    /** The key of the configuration. e.g. 20 */
    String QUERY_HIGHLIGHT_BOUNDARY_MAX_SCAN = "query.highlight.boundary.max.scan";

    /** The key of the configuration. e.g. chars */
    String QUERY_HIGHLIGHT_BOUNDARY_SCANNER = "query.highlight.boundary.scanner";

    /** The key of the configuration. e.g. default */

        List<TermQuery> queryList = SuggestUtil.getTermQueryList(null, fields);
        assertNotNull(queryList);
        assertEquals(0, queryList.size());
    }

    // Additional tests for createSuggestTextId boundary cases
    @Test
    public void testCreateSuggestTextIdBoundaryExactly445() {
        // Create text that encodes to exactly 445 characters

                return escapeHighlight(text);
            }
        }

        return StringUtil.EMPTY;
    }

    /**
     * Escapes HTML and applies highlighting to text.
     * Handles boundary position detection if enabled.
     *
     * @param text the text to process
     * @return the escaped and highlighted text
     */
    protected String escapeHighlight(final String text) {