+ [unittest] add the unittest comments for prepareCardDataset.

module/screen/test/model/preparecarddataset.php

@@ -0,0 +1,20 @@
+#!/usr/bin/env php
+<?php
+include dirname(__FILE__, 5) . '/test/lib/init.php';
+include dirname(__FILE__, 2) . '/lib/screen.unittest.class.php';
+
+/**
+
+title=测试 screenModel->prepareCardDataset();
+timeout=0
+cid=1
+
+*/
+
+$screen     = new screenTest();
+$component1 = new stdclass();
+$component1->type   = 'card';
+$component1->option = new stdclass();
+
+$component2 = clone $component1;
+$component2->styles = 1;