}

    /**
     * Determines if the given address string represents an IPv6 address.
     * This method validates the address using InetAddress to ensure it's a valid IPv6 address.
     *
     * @param address the IP address string to check
     * @return true if the address is a valid IPv6 address, false otherwise
     */
    public static boolean isIPv6Address(final String address) {
        if (address == null) {
            return false;

        System.setProperty("fess.webapp.path", webappDir.toString());
        System.setProperty("fess.conf.path", confDir.toString());

        // Path under webapp (second property) should be valid
        final File testFile = new File(webappDir.toFile(), "test.html");
        testFile.createNewFile();

        action.validateFilePath(testFile.getAbsolutePath());
    }

    @Test

        // Verify response can be parsed as JSON
        final Map<String, Object> res = JsonPath.from(response).getMap("response");
        assertNotNull(res, "Response should be valid JSON");

        logger.info("[END] statsResponseFormatTest");
    }

    @Test
    void multipleStatsCallsTest() {
        logger.info("[BEGIN] multipleStatsCallsTest");

var(--bs-success);\n  border-radius: var(--bs-border-radius);\n}\n\n.was-validated :valid ~ .valid-feedback,\n.was-validated :valid ~ .valid-tooltip,\n.is-valid ~ .valid-feedback,\n.is-valid ~ .valid-tooltip {\n  display: block;\n}\n\n.was-validated .form-control:valid, .form-control.is-valid {\n  border-color: var(--bs-form-valid-border-color);\n  padding-right: calc(1.5em + 0.75rem);\n  background-image: url(\"data:image/svg+xml,%3csvg xmlns='http://www.w3.org/2000/svg' viewBox='0 0 8 8'%3e%3cpath...

        queryFieldConfig.setSearchFields(searchFields);
    }

    /**
     * Test isSearchField() with Set-based lookup.
     */
    @Test
    public void test_isSearchField_withSetBasedLookup() {
        // Test valid search fields
        assertTrue(queryCommand.isSearchField("title"));
        assertTrue(queryCommand.isSearchField("content"));
        assertTrue(queryCommand.isSearchField("url"));

        assertNotNull(option);
        assertTrue(option.startsWith("-D" + Constants.FESS_THUMBNAIL_PATH + "="));
        assertTrue(option.contains(tempDir.getAbsolutePath()));
    }

    // Test offer with valid generator
    @Test
    public void test_offer_withValidGenerator() {
        TestThumbnailGenerator generator = new TestThumbnailGenerator();
        generator.available = true;
        generator.target = true;

      $settingSearchForm,
      listSelectedCssInfo,
      listDeselectedCssInfo,
      boxCssInfo,

      suggestingSts = false,

      /**
       * Helper function to check if a keycode is a valid input key
       */
      isInputKey = function (keyCode) {
        return (
          (keyCode >= KEY_CODES.NUM_0 && keyCode <= KEY_CODES.NUM_9) ||
          (keyCode >= KEY_CODES.A && keyCode <= KEY_CODES.Z) ||

        assertNull(exception.getCause());
    }

    @Test
    public void test_constructor_withNullMessageAndValidCause() {
        // Test constructor with null message and valid cause
        Throwable cause = new RuntimeException("Runtime error");
        CommandExecutionException exception = new CommandExecutionException(null, cause);

        assertNotNull(exception);

  -u admin:admin
```

---

## Troubleshooting

### Common Migration Issues

#### Issue: Import fails with "Invalid format"

**Solution**:
- Ensure NDJSON files have one valid JSON object per line
- Check for UTF-8 encoding
- Validate JSON syntax with `jq`:
  ```bash
  cat documents.ndjson | jq empty
  ```

#### Issue: GSA XML import creates no configurations

**Solution**:

        QueryBuilder builder = queryProcessor.execute(context, prefixQuery, 1.0f);

        assertNotNull(builder);
        // Empty prefix should still create a valid query
        assertTrue(builder instanceof MatchPhrasePrefixQueryBuilder);

        MatchPhrasePrefixQueryBuilder mpqb = (MatchPhrasePrefixQueryBuilder) builder;
        assertEquals("", mpqb.value());
    }