# devopsgym / testgen__alibaba__fastjson2-1245 - taskset: [devopsgym](https://harnessreport.com/tasks/devopsgym.md) - difficulty: hard - category: test-generation - language: - runnable from the site: no - agent timeout: 3000s ## Results by harness _none yet_ ## Instruction ``` The following text contains a user issue (in <issue/> brackets) posted at a repository. Further, you are provided with file contents of several files in the repository that contain relevant code (in <code> brackets). It may be necessary to use code from third party dependencies or files not contained in the attached documents however. Your task is to identify the issue and implement a test case that verifies a proposed solution to this issue. More details at the end of this text. <issue> ### 问题描述 使用动态代理，如果javabean里面有EnumSet，反序列化时会失败。 ### 环境信息 *请填写以下信息：* - OS信息： MacBook pro M1 - JDK信息： jdk1.8.0_321.jdk - 版本信息：2.0.25 ### 重现步骤 输入数据如下： ```java @Data public class ParamsDTO implements Serializable { private EnumSet<TimeUnit> paramsItemSet; } @Test public void testEnumSet() { ParamsDTO paramsDTO = new ParamsDTO(); EnumSet<TimeUnit> timeUnitSet = EnumSet.of(TimeUnit.DAYS); paramsDTO.setParamsItemSet(timeUnitSet); AdvisedSupport config = new AdvisedSupport(); config.setTarget(paramsDTO); DefaultAopProxyFactory factory = new DefaultAopProxyFactory(); Object proxy = factory.createAopProxy(config).getProxy(); Object proxy1 = factory.createAopProxy(config).getProxy(); ObjectWriter objectWriter = JSONFactory.getDefaultObjectWriterProvider().getObjectWriter(proxy.getClass()); ObjectWriter objectWriter1 = JSONFactory.getDefaultObjectWriterProvider().getObjectWriter(proxy1.getClass()); assertSame(objectWriter, objectWriter1); byte[] jsonbBytes = JSONB.toBytes(proxy, writerFeatures); ContextAutoTypeBeforeHandler contextAutoTypeBeforeHandler = new ContextAutoTypeBeforeHandler(true, ParamsDTO.class.getName()); ParamsDTO paramsDTO1 = (ParamsDTO) JSONB.parseObject(jsonbBytes, Object.class, contextAutoTypeBeforeHandler, readerFeatures); assertEquals(paramsDTO.getParamsItemSet().size(), paramsDTO1.getParamsItemSet().size()); assertEquals(paramsDTO.getParamsItemSet().iterator().next(), paramsDTO1.getParamsItemSet().iterator().next()); } JSONWriter.Feature[] writerFeatures = { JSONWriter.Feature.WriteClassName, JSONWriter.Feature.FieldBased, JSONWriter.Feature.ErrorOnNoneSerializable, JSONWriter.Feature.ReferenceDetection, JSONWriter.Feature.WriteNulls, JSONWriter.Feature.NotWriteDefaultValue, JSONWriter.Feature.NotWriteHashMapArrayListClassName, JSONWriter.Feature.WriteNameAsSymbol }; JSONReader.Feature[] readerFeatures = { JSONReader.Feature.UseDefaultConstructorAsPossible, JSONReader.Feature.ErrorOnNoneSerializable, JSONReader.Feature.UseNativeObject, JSONReader.Feature.FieldBased }; ``` ### 期待的正确结果 反序列化正常，没有报错。 ### 相关日志输出 ``` com.alibaba.fastjson2.JSONException: create instance error class java.util.RegularEnumSet, offset 90 at com.alibaba.fastjson2.reader.ObjectReaderImplList.readJSONBObject(ObjectReaderImplList.java:395) at com.alibaba.fastjson2.reader.ORG_1_2_ParamsDTO.readJSONBObject(Unknown Source) at com.alibaba.fastjson2.JSONB.parseObject(JSONB.java:519) at com.alibaba.fastjson2.dubbo.DubboTest6.testEnumSet(DubboTest6.java:81) ... Caused by: java.lang.InstantiationException: java.util.RegularEnumSet at java.lang.Class.newInstance(Class.java:427) at com.alibaba.fastjson2.reader.ObjectReaderImplList.readJSONBObject(ObjectReaderImplList.java:393) ... 73 more Caused by: java.lang.NoSuchMethodException: java.util.RegularEnumSet.<init>() at java.lang.Class.getConstructor0(Class.java:3082) at java.lang.Class.newInstance(Class.java:412) ... 74 more ``` #### 附加信息 我已经验证此问题，ObjectReaderImplList缺少判断导致，我提交了bugfix PR，请评审。 </issue> Please generate test cases that check whether an implemented solution resolves the issue of the user (at the top, within <issue/> brackets). You may apply changes to several files. Apply as much reasoning as you please and see necessary. Make sure to implement only test cases and don't try to fix the issue itself. You are not allowed to read git history. ``` --- Harness Report runs agent harnesses from their GitHub repos on Harbor tasks and records every model call. Every page is also `.md` and `.json`; index: https://harnessreport.com/llms.txt · MCP: https://harnessreport.com/mcp