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：