- For timestamp tests: use minimal delays (50-100ms)
- Clean only test-specific indices (not `_all` unless needed)
- Use `runner.refresh()` after index operations
- Test with realistic multilingual content

### Key Test Classes

- `SuggesterRefactoringTest` - Index lifecycle, alias management
- `SuggesterTest` - Core functionality
- `SuggestIndexerTest` - Indexing operations

    }

    // Additional tests for escapeWildcardQuery
    @Test
    public void testEscapeWildcardQueryWithMixedContent() {
        // Test with realistic query containing wildcards and regular text
        String query = "find*all?documents.pdf";
        String escaped = SuggestUtil.escapeWildcardQuery(query);
        assertEquals("find\\*all\\?documents.pdf", escaped);
    }