* variable lookup.
     *
     * @param props The properties to add the environment variables to, may be {@code null}.
     */
    public static void addEnvVars(Properties props) {
        if (props != null) {
            if (envVars == null) {
                Properties tmp = new Properties();

        Map<String, String> props = new HashMap<>();
        props.put("aa", "${bb}");
        props.put("bb", "${aa}");
        DefaultModelBuildingRequest request = new DefaultModelBuildingRequest();

        Model model = new Model(
                org.apache.maven.api.model.Model.newBuilder().properties(props).build());

        return p;
    }

    private Properties newProperties(String osName, String osVersion, String osArch) {
        Properties props = new Properties();
        props.setProperty("os.name", osName);
        props.setProperty("os.version", osVersion);
        props.setProperty("os.arch", osArch);
        return props;
    }

    @Test
    void testVersionStringComparison() throws Exception {

        Properties props = new Properties();
        // Set some default test properties
        props.setProperty("jcifs.smb.client.username", "testuser");
        props.setProperty("jcifs.smb.client.password", "testpass");
        props.setProperty("jcifs.smb.client.domain", "testdomain");
        props.setProperty("jcifs.netbios.hostname", "testhost");
        props.setProperty("jcifs.netbios.scope", "");

    }

    Date readLastUpdated(File touchfile, String key) {
        getLogger().debug("Searching for " + key + " in resolution tracking file.");

        Properties props = read(touchfile);
        if (props != null) {
            String rawVal = props.getProperty(key);
            if (rawVal != null) {
                try {
                    return new Date(Long.parseLong(rawVal));

        Properties props = new Properties();
        props.setProperty("jcifs.smb.client.useRDMA", "true");
        props.setProperty("jcifs.smb.client.rdmaProvider", "disni");
        props.setProperty("jcifs.smb.client.rdmaReadWriteThreshold", "16384");
        props.setProperty("jcifs.smb.client.rdmaMaxSendSize", "131072");
        props.setProperty("jcifs.smb.client.rdmaMaxReceiveSize", "131072");

                String overrideName = name.substring(OVERRIDE_PREFIX.length());
                props.put(overrideName, substVars(value, name, props, callback));
            } else {
                props.put(name, substVars(value, name, props, callback));
            }
        }
        props.keySet().removeIf(k -> k.startsWith(OVERRIDE_PREFIX));
    }

    public void testBatchLimitForDifferentCommands() throws CIFSException {
        Properties props = new Properties();
        props.setProperty("jcifs.smb.client.useBatching", "true");
        props.setProperty("jcifs.smb.client.useUnicode", "true");

        PropertyConfiguration config = new PropertyConfiguration(props);

        // Test various command batch limits

                String overrideName = name.substring(OVERRIDE_PREFIX.length());
                props.put(overrideName, substVars(value, name, props, callback));
            } else {
                props.put(name, substVars(value, name, props, callback));
            }
        }
        props.keySet().removeIf(k -> k.startsWith(OVERRIDE_PREFIX));
    }

     *
     * @param props the properties to search in
     * @param key the property key to look up
     * @param def the default value to return if key is not found or cannot be parsed
     * @return the integer value of the property or the default value
     */
    public static int getInt(final Properties props, final String key, int def) {
        final String s = props.getProperty(key);
        if (s != null) {