JUnit test cases stretegy for void returning methods

There are many question regarding Unit test cases for void returning methods but none of them have satisfactory answer. I have also encountered the same problem while testing a void returning method in my system. How can I decide which strategy should be used to check such methods? In my case Code snippet is like this :

public class MyRequestLogger {

private static final Logger logger_request = LogManager.getLogger("requestLogger");


/**
 * @param myRequest
 */
public static void logMyRequest(MyRequest myRequest) {
    LogFormatter lf = new LogFormatter();

    lf.addField(myRequest.getVisitorId());
    lf.addField(myRequest.getRequestIdString());
    lf.addField(myRequest.getIpAddress());

    GeoLocation geoLocation = myRequest.getGeoLocation();

    if (geoLocation == null) {
        //Adding blank object to keep the logging consistent
        geoLocation = new GeoLocation();
    }

    lf.addField(geoLocation.getCountry());
    lf.addField(geoLocation.getState());
    lf.addField(geoLocation.getCity());

    lf.addField(myRequest.getWebsiteUrl());
    lf.addField(myRequest.getPage());
    lf.addField(StringUtils.join(myRequest.getCategories(), ','));
    lf.addField(myRequest.getUserAgent());
    lf.addField(StringUtils.join(myRequest.getKeywords(), ','));
    lf.addField(StringUtils.join(myRequest.getCustomParamsFromRequest(), ','));
    lf.addField(StringUtils.join(myRequest.getAdspaceIds(), ','));

    logger_request.info(lf.toString());

}   

I have to test logMyRequest method which is static as well.