给Fitnesse添加调用多参数fixture的调用方法

修改文件：fitnesse.slim.fixtureInteraction.DefaultInteraction.java

修改如下三处内容：

（注意只支持仅含有一个参数，且该参数是多参数的fixture）

 protected Method findMatchingMethod(String methodName, Class<?> k, int nArgs) {
         Method[] methods = k.getMethods();
         if(methods == null) {
             methods = k.getMethods();
         }

         for (Method method : methods) {
             boolean hasMatchingName = method.getName().equals(methodName);
             if(hasMatchingName && method.isVarArgs()){
                 return method;
             }
             boolean hasMatchingArguments = method.getParameterTypes().length == nArgs;
             if (hasMatchingName && hasMatchingArguments) {
                 return method;
             }
         }
         return null;
     }

 protected Object[] convertArgs(Method method, Object[] args) {
         Type[] argumentParameterTypes=null;
         if(method.isVarArgs()){
             return args;
         }else{
             argumentParameterTypes = method.getGenericParameterTypes();
         }
         return ConverterSupport.convertArgs(args, argumentParameterTypes);
     }

 public Object methodInvoke(Method method, Object instance, Object... convertedArgs) throws Throwable {
         try {
             if(method.isVarArgs()){
                 String[] s = new String[convertedArgs.length];
                 int i =0;
                 for(Object arg:convertedArgs){
                     s[i]=arg.toString();
                     i++;
                 }
                 return method.invoke(instance, (Object)s);
             }else{
                 return method.invoke(instance, convertedArgs);
             }

         } catch (InvocationTargetException e) {
             if(e.getCause() != null){
                 throw e.getCause();
             }else{
                 throw e.getTargetException();
             }
         }
     }

使用例子：