assertFailsToDecode(base64(), "?", "Invalid input length 1");
  }

  public void testBase64CannotUpperCase() {
    assertThrows(IllegalStateException.class, () -> base64().upperCase());
  }

  public void testBase64CannotLowerCase() {
    assertThrows(IllegalStateException.class, () -> base64().lowerCase());
  }

  public void testBase64CannotIgnoreCase() {

        ScriptEngine upperCase = scriptEngineFactory.getScriptEngine("TESTENGINE");
        ScriptEngine mixedCase = scriptEngineFactory.getScriptEngine("TestEngine");

        assertNotNull(lowerCase);
        assertNotNull(upperCase);
        assertNotNull(mixedCase);
        assertEquals(testScriptEngine, lowerCase);
        assertEquals(testScriptEngine, upperCase);
        assertEquals(testScriptEngine, mixedCase);

    assertFailsToDecode(base64(), "?", "Invalid input length 1");
  }

  public void testBase64CannotUpperCase() {
    assertThrows(IllegalStateException.class, () -> base64().upperCase());
  }

  public void testBase64CannotLowerCase() {
    assertThrows(IllegalStateException.class, () -> base64().lowerCase());
  }

  public void testBase64CannotIgnoreCase() {

        ScriptEngine retrievedByClass = scriptEngineFactory.getScriptEngine("testscriptengine");
        assertNotNull(retrievedByClass);
        assertEquals(engine, retrievedByClass);
    }

    // Test add method with uppercase name
    public void test_add_uppercaseName() {
        TestScriptEngine engine = new TestScriptEngine();
        scriptEngineFactory.add("TESTENGINE", engine);

        // Should be accessible with lowercase

        QueryBuilder queryBuilder2 = queryCommand.convertWildcardQuery(queryContext2, wildcardQuery2, 1.0f);
        assertNotNull(queryBuilder2);

        // The term should remain uppercase
        String queryString2 = queryBuilder2.toString();
        assertTrue(queryString2.contains("TEST*") || queryString2.contains("TEST"));
    }

        assertTrue(builder instanceof MatchPhrasePrefixQueryBuilder);

        MatchPhrasePrefixQueryBuilder mpqb = (MatchPhrasePrefixQueryBuilder) builder;
        assertEquals("TEST", mpqb.value()); // Should remain uppercase
    }

    public void test_convertPrefixQuery_withEmptyPrefix() throws Exception {
        QueryContext context = new QueryContext("test", false);

        // Should add file type queries since there's a filetype query
        assertTrue(queryMap.size() > 2);
        // Keys might be labels.facet_filetype_* or uppercase file type
        assertTrue(queryMap.containsKey("labels.facet_filetype_pdf") || queryMap.containsKey("PDF"));
        assertTrue(queryMap.containsKey("DOC") || queryMap.containsKey("labels.facet_filetype_doc"));

 * determine addressability of any host, clients of this class will need to perform their own DNS
 * lookups.
 *
 * <p>During construction, names are normalized in two ways:
 *
 * <ol>
 *   <li>ASCII uppercase characters are converted to lowercase.
 *   <li>Unicode dot separators other than the ASCII period ({@code '.'}) are converted to the ASCII
 *       period.
 * </ol>
 *

    return JavaLetterOrDigit.INSTANCE;
  }

  /**
   * Determines whether a BMP character is upper case according to {@linkplain
   * Character#isUpperCase(char) Java's definition}.
   *
   * @deprecated Some uppercase characters are supplementary characters; see the class
   *     documentation.
   * @since 19.0 (since 1.0 as constant {@code JAVA_UPPER_CASE})
   */
  @Deprecated
  public static CharMatcher javaUpperCase() {