@@ -0,0 +1,714 @@
+package com.alibaba.json.bvt.bug;%0A%0Aimport org.junit.Assert;%0A%0Aimport com.alibaba.fastjson.JSON;%0Aimport com.alibaba.fastjson.TypeReference;%0A%0Aimport junit.framework.TestCase;%0A%0Apublic class Bug_for_issue_427 extends TestCase %7B%0A%0A    public void test_for_issue() throws Exception %7B%0A        String value = %22================================================%22%0A                + %22%5Cn%E6%9C%8D%E5%8A%A1%E5%99%A8%E5%90%8D%E7%A7%B0%EF%BC%9A%5BFFFF00%5DN23-%E7%89%A9%E5%8D%8E%E5%A4%A9%E5%AE%9D%C2%A0%5B-%5D%22%0A                + %22%5Cn%E5%BC%80%E6%9C%8D%E6%97%B6%E9%97%B4%EF%BC%9A%5BFFFF00%5D2015%E5%B9%B410%E6%9C%8816%E6%97%A511%EF%BC%9A00%EF%BC%88%E5%91%A8%E4%BA%94%EF%BC%89%5B-%5D%22%0A                + %22%5Cn================================================%22;%0A        %0A        Model model = new Model();%0A        model.value = value;%0A        JSON.toJSONString(model);%0A    %7D%0A%0A    public static class Model %7B%0A%0A        public String value;%0A    %7D%0A%7D%0A

add testcase for issue 427. https://github.com/alibaba/fastjson/issues/427