Objects.requireNonNull(command, "command");
        if (command.length == 0) {
            throw new IllegalArgumentException("command must not be empty");
        }

        ProcessBuilder pb = new ProcessBuilder(command);
        Process process = pb.start();

        Future<String> stdoutFuture = readStreamAsync(process.getInputStream());

        // Execute
        final InvalidQueryException exception = new InvalidQueryException(messageCode, message);

        // Verify empty message is preserved
        assertNotNull(exception);
        assertEquals("", exception.getMessage());
        assertEquals(messageCode, exception.getMessageCode());
    }

    @Test

        }
        return "-";
    }

    /**
     * Generates a cache key from a crawler object.
     *
     * @param keyObj the crawler object to generate key for
     * @return Optional cache key string, empty if object type not supported
     */
    protected OptionalThing<String> getCacheKey(final Object keyObj) {
        if (keyObj instanceof final UrlQueue<?> urlQueue) {

        assertEquals("(content:\"value1\" OR content:\"value2\")", getQuery("", new String[0], multiFields, Collections.emptyMap(), false));

        final Map<String, String[]> nullFields = Collections.singletonMap("empty", null);
        assertEquals("", getQuery("", new String[0], nullFields, Collections.emptyMap(), false));
    }

    @Test
    public void test_sortField() {

        @Override
        public int hashCode() {
            return getClass().hashCode();
        }

        @Override
        public void visit(org.apache.lucene.search.QueryVisitor visitor) {
            // Empty implementation for test
        }
    }

    @Test
    public void test_execute_withUnknownQueryType() {
        // Test executing BoostQuery with an unknown query type inside

    }

    /**
     * Gets the query languages from the current request.
     * @return An optional containing the query languages array, or empty if not available.
     */
    protected OptionalThing<String[]> getQueryLanguages() {
        return LaRequestUtil.getOptionalRequest()
                .map(request -> ComponentUtil.getFessConfig()

    /**
     * Gets the current user bean from the session.
     * This method returns the concrete FessUserBean class instead of the generic type.
     *
     * @return an optional containing the current user bean, or empty if not logged in
     */
    @Override
    protected OptionalThing<FessUserBean> getUserBean() { // to return as concrete class
        return fessLoginAssist.getSavedUserBean();
    }

    /**

        assertEquals("testuser", chain.changePasswordCalls.get(0).getKey());
        assertNull(chain.changePasswordCalls.get(0).getValue());
    }

    // Test changePassword with empty strings
    @Test
    public void test_changePassword_emptyStrings() {
        TestAuthenticationChain chain = new TestAuthenticationChain();
        chain.changePasswordResult = false;

When defining conventions for a property, there are largely three approaches:
1. Do not set a convention at all
2. Set a convention in a plugin

								><a class="nav-link active" href="${installationLink}" target="_olh"><i class="fa fa-exclamation-triangle text-warning" aria-hidden="true"
									></i></a></li>
							</c:if>
							<c:choose>
								<c:when test="${!empty username && username != 'guest'}">
									<li class="nav-item">
										<div class="dropdown">
											<a id="userMenu" class="nav-link dropdown-toggle" data-bs-toggle="dropdown"