if (args.length == 0) {
            System.err.println("Usage: java CheckRemoteProjectRef.java <propertyKey1> <propertyKey2> ...");
            System.exit(2);
        }

        Path propsPath = Paths.get("gradle.properties");
        if (!Files.exists(propsPath)) {
            System.err.println("gradle.properties not found at: " + propsPath.toAbsolutePath());
            System.exit(2);
        }

    @Test
    public void test_getJavaVersion() {
        System.setProperty("java.version", "1.4.2_19");
        assertEquals(4, JvmUtil.getJavaVersion());
        System.setProperty("java.version", "1.5.0_15");
        assertEquals(5, JvmUtil.getJavaVersion());
        System.setProperty("java.version", "1.6.0_34");
        assertEquals(6, JvmUtil.getJavaVersion());
        System.setProperty("java.version", "1.7.0_25");

        File propFile = new File(tempDir, "test.properties");

        // Mock ComponentUtil.getSystemProperties() to return actual system properties
        Properties systemProps = System.getProperties();

        // Set a system property
        System.setProperty("test.prop", "test.value");

        execJob.testCreateSystemProperties(cmdList, propFile);

        assertTrue(propFile.exists());

        assertNotNull(thumbnailManager.thumbnailTaskQueue);
    }

    // Test initialization with system property
    @Test
    public void test_init_withSystemProperty() {
        File customDir = new File(tempDir, "custom");
        System.setProperty(Constants.FESS_THUMBNAIL_PATH, customDir.getAbsolutePath());
        try {
            ThumbnailManager manager = new ThumbnailManager() {

    /** System property key for Fess port configuration */
    private static final String FESS_PORT = "fess.port";

    /** System property key for Fess temporary directory path */
    private static final String FESS_TEMP_PATH = "fess.temp.path";

    /** System property key for Fess variable directory path */
    private static final String FESS_VAR_PATH = "fess.var.path";

    }

    // Test system property override
    @Test
    public void test_get_systemPropertyOverride() {
        // Set system property that should override config
        String testKey = "test.property";
        String systemValue = "system-value";
        System.setProperty(Constants.FESS_CONFIG_PREFIX + testKey, systemValue);

        try {
            // Test that system property takes precedence

            }
        }
        System.out.println("- Downloading to: " + outputFile.getAbsolutePath());
        try {
            downloadFileFromURL(url, outputFile);
            System.out.println("Done");
            System.exit(0);
        } catch (Throwable e) {
            System.out.println("- Error downloading");
            e.printStackTrace();
            System.exit(1);
        }
    }

            final String confPath = System.getenv(FESS_OVERRIDE_CONF_PATH);
            if (StringUtil.isNotBlank(confPath)) {
                return OptionalEntity.of(confPath);
            }
        }
        return OptionalEntity.empty();
    }

    /**
     * Gets the path to configuration files. In Docker environments, checks /opt/fess first,

public class SystemUtilTest extends UnitFessTestCase {

    @Test
    public void test_getSearchEngineHttpAddress_null() {
        // Clear the system property to test null case
        String originalValue = System.getProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);
        System.clearProperty(Constants.FESS_SEARCH_ENGINE_HTTP_ADDRESS);

        try {
            String result = SystemUtil.getSearchEngineHttpAddress();

            builder.setExecutable(getJavaLauncher().get().getExecutablePath().getAsFile());
            builder.getMainModule().set("jdk.httpserver");
            builder.setStandardOutput(System.out);
            builder.setErrorOutput(System.err);
            builder.setArgs(Arrays.asList("-p", getPort().get(), "-d", getDocsDirectory().get().getAsFile().getAbsolutePath()));