package com.alibaba.json.bvt.serializer.filters; import junit.framework.TestCase; import org.junit.Assert; import com.alibaba.fastjson.JSON; import com.alibaba.fastjson.serializer.BeforeFilter; public class BeforeFilterTest2 extends TestCase { public void test_beforeFilter() throws Exception { BeforeFilter filter = new BeforeFilter() { @Override public void writeBefore(Object object) { this.writeKeyValue("id", 123); } }; Assert.assertEquals(JSON.toJSONString(new VO(), filter), "{\"id\":123}"); } public void test_beforeFilter2() throws Exception { BeforeFilter filter = new BeforeFilter() { @Override public void writeBefore(Object object) { this.writeKeyValue("id", 123); this.writeKeyValue("name", "wenshao"); } }; Assert.assertEquals(JSON.toJSONString(new VO(), filter), "{\"id\":123,\"name\":\"wenshao\"}"); } public static class VO { } }