Java - How to check if dynamically instantiated method is called at runtime?

Using reflection in Java, I've written some code to iterate through an arraylist of the names of classes I want enabled, instantiate them and in turn invoke a method with the common name 'parse(String)' within each.

for (String parser : enabledParses)
{
    Class<?> parserClass = Class.forname(String.format"%s.%s", parserDirectoryPath, parser));
    Method parseMethod = parserClass.getMethod("parse", String.class);
    Object parserObj = null;

    switch (parser)
    {
        case "parser1" : 
            parserObj = parserClass.getConstructor(ConfigWrapper.class, Alerter.class).newInstance(config, alerter);
            break;
    ...
    ...
    ...
    }
    parseMethod.invoke(pluginObj, stringToParse);

When testing, how can I check to see that the parse() method has been called for each of the enabled parsers?

Thanks!