Copilot commented on code in PR #7777:
URL: https://github.com/apache/incubator-seata/pull/7777#discussion_r2516930167


##########
saga/seata-saga-statelang/src/test/java/org/apache/seata/saga/statelang/parser/StateParserFactoryTest.java:
##########
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.seata.saga.statelang.parser;
+
+import org.apache.seata.saga.statelang.domain.StateType;
+import org.apache.seata.saga.statelang.parser.impl.ChoiceStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensateSubStateMachineStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensationTriggerStateParser;
+import org.apache.seata.saga.statelang.parser.impl.FailEndStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ScriptTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ServiceTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.SubStateMachineParser;
+import org.apache.seata.saga.statelang.parser.impl.SucceedEndStateParser;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * test StateParserFactory
+ */
+public class StateParserFactoryTest {
+
+    @Test
+    public void testGetStateParser_ExistingTypes() {
+        StateParser serviceTaskParser = 
StateParserFactory.getStateParser(StateType.SERVICE_TASK);
+        assertNotNull("ServiceTaskStateParser should not be null");
+        assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
+
+        StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
+        assertNotNull("ChoiceStateParser should not be null", 
String.valueOf(choiceParser));
+        assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
+
+        StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
+        assertNotNull("CompensationTriggerStateParser should not be null", 
String.valueOf(compensationTriggerParser));
+        assertTrue(
+                compensationTriggerParser instanceof 
CompensationTriggerStateParser,
+                "Parser should be CompensationTriggerStateParser");
+
+        StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
+        assertNotNull("FailEndStateParser should not be null", 
String.valueOf(failEndParser));
+        assertTrue(failEndParser instanceof FailEndStateParser, "Parser should 
be FailEndStateParser");
+
+        StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
+        assertNotNull("SucceedEndStateParser should not be null", 
String.valueOf(succeedEndParser));
+        assertTrue(succeedEndParser instanceof SucceedEndStateParser, "Parser 
should be SucceedEndStateParser");
+
+        StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
+        assertNotNull("SubStateMachineParser should not be null", 
String.valueOf(subStateMachineParser));
+        assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
+
+        StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
+        assertNotNull("CompensateSubStateMachineStateParser should not be 
null", String.valueOf(subCompensationParser));
+        assertTrue(
+                subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
+                "Parser should be CompensateSubStateMachineStateParser");
+
+        StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
+        assertNotNull("ScriptTaskStateParser should not be null", 
String.valueOf(scriptTaskParser));

Review Comment:
   The `assertNotNull` call has incorrect usage. It's checking a string 
representation instead of the actual parser object. It should be:
   ```java
   assertNotNull(choiceParser, "ChoiceStateParser should not be null");
   ```
   ```suggestion
           assertNotNull(serviceTaskParser, "ServiceTaskStateParser should not 
be null");
           assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
   
           StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
           assertNotNull(choiceParser, "ChoiceStateParser should not be null");
           assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
   
           StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
           assertNotNull(compensationTriggerParser, 
"CompensationTriggerStateParser should not be null");
           assertTrue(
                   compensationTriggerParser instanceof 
CompensationTriggerStateParser,
                   "Parser should be CompensationTriggerStateParser");
   
           StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
           assertNotNull(failEndParser, "FailEndStateParser should not be 
null");
           assertTrue(failEndParser instanceof FailEndStateParser, "Parser 
should be FailEndStateParser");
   
           StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
           assertNotNull(succeedEndParser, "SucceedEndStateParser should not be 
null");
           assertTrue(succeedEndParser instanceof SucceedEndStateParser, 
"Parser should be SucceedEndStateParser");
   
           StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
           assertNotNull(subStateMachineParser, "SubStateMachineParser should 
not be null");
           assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
   
           StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
           assertNotNull(subCompensationParser, 
"CompensateSubStateMachineStateParser should not be null");
           assertTrue(
                   subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
                   "Parser should be CompensateSubStateMachineStateParser");
   
           StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
           assertNotNull(scriptTaskParser, "ScriptTaskStateParser should not be 
null");
   ```



##########
saga/seata-saga-statelang/src/test/java/org/apache/seata/saga/statelang/parser/StateParserFactoryTest.java:
##########
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.seata.saga.statelang.parser;
+
+import org.apache.seata.saga.statelang.domain.StateType;
+import org.apache.seata.saga.statelang.parser.impl.ChoiceStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensateSubStateMachineStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensationTriggerStateParser;
+import org.apache.seata.saga.statelang.parser.impl.FailEndStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ScriptTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ServiceTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.SubStateMachineParser;
+import org.apache.seata.saga.statelang.parser.impl.SucceedEndStateParser;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * test StateParserFactory
+ */
+public class StateParserFactoryTest {
+
+    @Test
+    public void testGetStateParser_ExistingTypes() {
+        StateParser serviceTaskParser = 
StateParserFactory.getStateParser(StateType.SERVICE_TASK);
+        assertNotNull("ServiceTaskStateParser should not be null");
+        assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
+
+        StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
+        assertNotNull("ChoiceStateParser should not be null", 
String.valueOf(choiceParser));
+        assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
+
+        StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
+        assertNotNull("CompensationTriggerStateParser should not be null", 
String.valueOf(compensationTriggerParser));
+        assertTrue(
+                compensationTriggerParser instanceof 
CompensationTriggerStateParser,
+                "Parser should be CompensationTriggerStateParser");
+
+        StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
+        assertNotNull("FailEndStateParser should not be null", 
String.valueOf(failEndParser));
+        assertTrue(failEndParser instanceof FailEndStateParser, "Parser should 
be FailEndStateParser");
+
+        StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
+        assertNotNull("SucceedEndStateParser should not be null", 
String.valueOf(succeedEndParser));
+        assertTrue(succeedEndParser instanceof SucceedEndStateParser, "Parser 
should be SucceedEndStateParser");
+
+        StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
+        assertNotNull("SubStateMachineParser should not be null", 
String.valueOf(subStateMachineParser));
+        assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
+
+        StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
+        assertNotNull("CompensateSubStateMachineStateParser should not be 
null", String.valueOf(subCompensationParser));
+        assertTrue(
+                subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
+                "Parser should be CompensateSubStateMachineStateParser");
+
+        StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
+        assertNotNull("ScriptTaskStateParser should not be null", 
String.valueOf(scriptTaskParser));

Review Comment:
   The `assertNotNull` call has incorrect usage. It's checking a string 
representation instead of the actual parser object. It should be:
   ```java
   assertNotNull(scriptTaskParser, "ScriptTaskStateParser should not be null");
   ```
   ```suggestion
           assertNotNull(serviceTaskParser, "ServiceTaskStateParser should not 
be null");
           assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
   
           StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
           assertNotNull(choiceParser, "ChoiceStateParser should not be null");
           assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
   
           StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
           assertNotNull(compensationTriggerParser, 
"CompensationTriggerStateParser should not be null");
           assertTrue(
                   compensationTriggerParser instanceof 
CompensationTriggerStateParser,
                   "Parser should be CompensationTriggerStateParser");
   
           StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
           assertNotNull(failEndParser, "FailEndStateParser should not be 
null");
           assertTrue(failEndParser instanceof FailEndStateParser, "Parser 
should be FailEndStateParser");
   
           StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
           assertNotNull(succeedEndParser, "SucceedEndStateParser should not be 
null");
           assertTrue(succeedEndParser instanceof SucceedEndStateParser, 
"Parser should be SucceedEndStateParser");
   
           StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
           assertNotNull(subStateMachineParser, "SubStateMachineParser should 
not be null");
           assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
   
           StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
           assertNotNull(subCompensationParser, 
"CompensateSubStateMachineStateParser should not be null");
           assertTrue(
                   subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
                   "Parser should be CompensateSubStateMachineStateParser");
   
           StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
           assertNotNull(scriptTaskParser, "ScriptTaskStateParser should not be 
null");
   ```



##########
saga/seata-saga-statelang/src/test/java/org/apache/seata/saga/statelang/parser/StateParserFactoryTest.java:
##########
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.seata.saga.statelang.parser;
+
+import org.apache.seata.saga.statelang.domain.StateType;
+import org.apache.seata.saga.statelang.parser.impl.ChoiceStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensateSubStateMachineStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensationTriggerStateParser;
+import org.apache.seata.saga.statelang.parser.impl.FailEndStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ScriptTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ServiceTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.SubStateMachineParser;
+import org.apache.seata.saga.statelang.parser.impl.SucceedEndStateParser;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * test StateParserFactory
+ */
+public class StateParserFactoryTest {
+
+    @Test
+    public void testGetStateParser_ExistingTypes() {
+        StateParser serviceTaskParser = 
StateParserFactory.getStateParser(StateType.SERVICE_TASK);
+        assertNotNull("ServiceTaskStateParser should not be null");
+        assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
+
+        StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
+        assertNotNull("ChoiceStateParser should not be null", 
String.valueOf(choiceParser));
+        assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
+
+        StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
+        assertNotNull("CompensationTriggerStateParser should not be null", 
String.valueOf(compensationTriggerParser));
+        assertTrue(
+                compensationTriggerParser instanceof 
CompensationTriggerStateParser,
+                "Parser should be CompensationTriggerStateParser");
+
+        StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
+        assertNotNull("FailEndStateParser should not be null", 
String.valueOf(failEndParser));
+        assertTrue(failEndParser instanceof FailEndStateParser, "Parser should 
be FailEndStateParser");
+
+        StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
+        assertNotNull("SucceedEndStateParser should not be null", 
String.valueOf(succeedEndParser));
+        assertTrue(succeedEndParser instanceof SucceedEndStateParser, "Parser 
should be SucceedEndStateParser");
+
+        StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
+        assertNotNull("SubStateMachineParser should not be null", 
String.valueOf(subStateMachineParser));
+        assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
+
+        StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
+        assertNotNull("CompensateSubStateMachineStateParser should not be 
null", String.valueOf(subCompensationParser));
+        assertTrue(
+                subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
+                "Parser should be CompensateSubStateMachineStateParser");
+
+        StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
+        assertNotNull("ScriptTaskStateParser should not be null", 
String.valueOf(scriptTaskParser));

Review Comment:
   The `assertNotNull` call has incorrect usage. It's checking a string 
representation instead of the actual parser object. It should be:
   ```java
   assertNotNull(failEndParser, "FailEndStateParser should not be null");
   ```
   ```suggestion
           assertNotNull(serviceTaskParser, "ServiceTaskStateParser should not 
be null");
           assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
   
           StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
           assertNotNull(choiceParser, "ChoiceStateParser should not be null");
           assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
   
           StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
           assertNotNull(compensationTriggerParser, 
"CompensationTriggerStateParser should not be null");
           assertTrue(
                   compensationTriggerParser instanceof 
CompensationTriggerStateParser,
                   "Parser should be CompensationTriggerStateParser");
   
           StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
           assertNotNull(failEndParser, "FailEndStateParser should not be 
null");
           assertTrue(failEndParser instanceof FailEndStateParser, "Parser 
should be FailEndStateParser");
   
           StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
           assertNotNull(succeedEndParser, "SucceedEndStateParser should not be 
null");
           assertTrue(succeedEndParser instanceof SucceedEndStateParser, 
"Parser should be SucceedEndStateParser");
   
           StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
           assertNotNull(subStateMachineParser, "SubStateMachineParser should 
not be null");
           assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
   
           StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
           assertNotNull(subCompensationParser, 
"CompensateSubStateMachineStateParser should not be null");
           assertTrue(
                   subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
                   "Parser should be CompensateSubStateMachineStateParser");
   
           StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
           assertNotNull(scriptTaskParser, "ScriptTaskStateParser should not be 
null");
   ```



##########
saga/seata-saga-statelang/src/test/java/org/apache/seata/saga/statelang/parser/StateParserFactoryTest.java:
##########
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.seata.saga.statelang.parser;
+
+import org.apache.seata.saga.statelang.domain.StateType;
+import org.apache.seata.saga.statelang.parser.impl.ChoiceStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensateSubStateMachineStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensationTriggerStateParser;
+import org.apache.seata.saga.statelang.parser.impl.FailEndStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ScriptTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ServiceTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.SubStateMachineParser;
+import org.apache.seata.saga.statelang.parser.impl.SucceedEndStateParser;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * test StateParserFactory
+ */
+public class StateParserFactoryTest {
+
+    @Test
+    public void testGetStateParser_ExistingTypes() {
+        StateParser serviceTaskParser = 
StateParserFactory.getStateParser(StateType.SERVICE_TASK);
+        assertNotNull("ServiceTaskStateParser should not be null");
+        assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
+
+        StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
+        assertNotNull("ChoiceStateParser should not be null", 
String.valueOf(choiceParser));
+        assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
+
+        StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
+        assertNotNull("CompensationTriggerStateParser should not be null", 
String.valueOf(compensationTriggerParser));
+        assertTrue(
+                compensationTriggerParser instanceof 
CompensationTriggerStateParser,
+                "Parser should be CompensationTriggerStateParser");
+
+        StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
+        assertNotNull("FailEndStateParser should not be null", 
String.valueOf(failEndParser));
+        assertTrue(failEndParser instanceof FailEndStateParser, "Parser should 
be FailEndStateParser");
+
+        StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
+        assertNotNull("SucceedEndStateParser should not be null", 
String.valueOf(succeedEndParser));
+        assertTrue(succeedEndParser instanceof SucceedEndStateParser, "Parser 
should be SucceedEndStateParser");
+
+        StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
+        assertNotNull("SubStateMachineParser should not be null", 
String.valueOf(subStateMachineParser));
+        assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
+
+        StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
+        assertNotNull("CompensateSubStateMachineStateParser should not be 
null", String.valueOf(subCompensationParser));
+        assertTrue(
+                subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
+                "Parser should be CompensateSubStateMachineStateParser");
+
+        StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
+        assertNotNull("ScriptTaskStateParser should not be null", 
String.valueOf(scriptTaskParser));

Review Comment:
   The `assertNotNull` call has incorrect usage. It's checking a string 
representation instead of the actual parser object. It should be:
   ```java
   assertNotNull(subCompensationParser, "CompensateSubStateMachineStateParser 
should not be null");
   ```
   ```suggestion
           assertNotNull(serviceTaskParser, "ServiceTaskStateParser should not 
be null");
           assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
   
           StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
           assertNotNull(choiceParser, "ChoiceStateParser should not be null");
           assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
   
           StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
           assertNotNull(compensationTriggerParser, 
"CompensationTriggerStateParser should not be null");
           assertTrue(
                   compensationTriggerParser instanceof 
CompensationTriggerStateParser,
                   "Parser should be CompensationTriggerStateParser");
   
           StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
           assertNotNull(failEndParser, "FailEndStateParser should not be 
null");
           assertTrue(failEndParser instanceof FailEndStateParser, "Parser 
should be FailEndStateParser");
   
           StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
           assertNotNull(succeedEndParser, "SucceedEndStateParser should not be 
null");
           assertTrue(succeedEndParser instanceof SucceedEndStateParser, 
"Parser should be SucceedEndStateParser");
   
           StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
           assertNotNull(subStateMachineParser, "SubStateMachineParser should 
not be null");
           assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
   
           StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
           assertNotNull(subCompensationParser, 
"CompensateSubStateMachineStateParser should not be null");
           assertTrue(
                   subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
                   "Parser should be CompensateSubStateMachineStateParser");
   
           StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
           assertNotNull(scriptTaskParser, "ScriptTaskStateParser should not be 
null");
   ```



##########
saga/seata-saga-statelang/src/test/java/org/apache/seata/saga/statelang/parser/StateParserFactoryTest.java:
##########
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.seata.saga.statelang.parser;
+
+import org.apache.seata.saga.statelang.domain.StateType;
+import org.apache.seata.saga.statelang.parser.impl.ChoiceStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensateSubStateMachineStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensationTriggerStateParser;
+import org.apache.seata.saga.statelang.parser.impl.FailEndStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ScriptTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ServiceTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.SubStateMachineParser;
+import org.apache.seata.saga.statelang.parser.impl.SucceedEndStateParser;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * test StateParserFactory
+ */
+public class StateParserFactoryTest {
+
+    @Test
+    public void testGetStateParser_ExistingTypes() {
+        StateParser serviceTaskParser = 
StateParserFactory.getStateParser(StateType.SERVICE_TASK);
+        assertNotNull("ServiceTaskStateParser should not be null");
+        assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
+
+        StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
+        assertNotNull("ChoiceStateParser should not be null", 
String.valueOf(choiceParser));
+        assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
+
+        StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
+        assertNotNull("CompensationTriggerStateParser should not be null", 
String.valueOf(compensationTriggerParser));
+        assertTrue(
+                compensationTriggerParser instanceof 
CompensationTriggerStateParser,
+                "Parser should be CompensationTriggerStateParser");
+
+        StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
+        assertNotNull("FailEndStateParser should not be null", 
String.valueOf(failEndParser));
+        assertTrue(failEndParser instanceof FailEndStateParser, "Parser should 
be FailEndStateParser");
+
+        StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
+        assertNotNull("SucceedEndStateParser should not be null", 
String.valueOf(succeedEndParser));
+        assertTrue(succeedEndParser instanceof SucceedEndStateParser, "Parser 
should be SucceedEndStateParser");
+
+        StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
+        assertNotNull("SubStateMachineParser should not be null", 
String.valueOf(subStateMachineParser));
+        assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
+
+        StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
+        assertNotNull("CompensateSubStateMachineStateParser should not be 
null", String.valueOf(subCompensationParser));
+        assertTrue(
+                subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
+                "Parser should be CompensateSubStateMachineStateParser");
+
+        StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
+        assertNotNull("ScriptTaskStateParser should not be null", 
String.valueOf(scriptTaskParser));

Review Comment:
   The `assertNotNull` call has incorrect parameter order. The first parameter 
should be the object to check for null, not the message. It should be:
   ```java
   assertNotNull(serviceTaskParser, "ServiceTaskStateParser should not be 
null");
   ```
   ```suggestion
           assertNotNull(serviceTaskParser, "ServiceTaskStateParser should not 
be null");
           assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
   
           StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
           assertNotNull(choiceParser, "ChoiceStateParser should not be null");
           assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
   
           StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
           assertNotNull(compensationTriggerParser, 
"CompensationTriggerStateParser should not be null");
           assertTrue(
                   compensationTriggerParser instanceof 
CompensationTriggerStateParser,
                   "Parser should be CompensationTriggerStateParser");
   
           StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
           assertNotNull(failEndParser, "FailEndStateParser should not be 
null");
           assertTrue(failEndParser instanceof FailEndStateParser, "Parser 
should be FailEndStateParser");
   
           StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
           assertNotNull(succeedEndParser, "SucceedEndStateParser should not be 
null");
           assertTrue(succeedEndParser instanceof SucceedEndStateParser, 
"Parser should be SucceedEndStateParser");
   
           StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
           assertNotNull(subStateMachineParser, "SubStateMachineParser should 
not be null");
           assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
   
           StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
           assertNotNull(subCompensationParser, 
"CompensateSubStateMachineStateParser should not be null");
           assertTrue(
                   subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
                   "Parser should be CompensateSubStateMachineStateParser");
   
           StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
           assertNotNull(scriptTaskParser, "ScriptTaskStateParser should not be 
null");
   ```



##########
saga/seata-saga-statelang/src/test/java/org/apache/seata/saga/statelang/parser/StateParserFactoryTest.java:
##########
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.seata.saga.statelang.parser;
+
+import org.apache.seata.saga.statelang.domain.StateType;
+import org.apache.seata.saga.statelang.parser.impl.ChoiceStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensateSubStateMachineStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensationTriggerStateParser;
+import org.apache.seata.saga.statelang.parser.impl.FailEndStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ScriptTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ServiceTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.SubStateMachineParser;
+import org.apache.seata.saga.statelang.parser.impl.SucceedEndStateParser;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * test StateParserFactory
+ */
+public class StateParserFactoryTest {
+
+    @Test
+    public void testGetStateParser_ExistingTypes() {
+        StateParser serviceTaskParser = 
StateParserFactory.getStateParser(StateType.SERVICE_TASK);
+        assertNotNull("ServiceTaskStateParser should not be null");
+        assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
+
+        StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
+        assertNotNull("ChoiceStateParser should not be null", 
String.valueOf(choiceParser));
+        assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
+
+        StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
+        assertNotNull("CompensationTriggerStateParser should not be null", 
String.valueOf(compensationTriggerParser));
+        assertTrue(
+                compensationTriggerParser instanceof 
CompensationTriggerStateParser,
+                "Parser should be CompensationTriggerStateParser");
+
+        StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
+        assertNotNull("FailEndStateParser should not be null", 
String.valueOf(failEndParser));
+        assertTrue(failEndParser instanceof FailEndStateParser, "Parser should 
be FailEndStateParser");
+
+        StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
+        assertNotNull("SucceedEndStateParser should not be null", 
String.valueOf(succeedEndParser));
+        assertTrue(succeedEndParser instanceof SucceedEndStateParser, "Parser 
should be SucceedEndStateParser");
+
+        StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
+        assertNotNull("SubStateMachineParser should not be null", 
String.valueOf(subStateMachineParser));
+        assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
+
+        StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
+        assertNotNull("CompensateSubStateMachineStateParser should not be 
null", String.valueOf(subCompensationParser));
+        assertTrue(
+                subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
+                "Parser should be CompensateSubStateMachineStateParser");
+
+        StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
+        assertNotNull("ScriptTaskStateParser should not be null", 
String.valueOf(scriptTaskParser));

Review Comment:
   The `assertNotNull` call has incorrect usage. It's checking a string 
representation instead of the actual parser object. It should be:
   ```java
   assertNotNull(succeedEndParser, "SucceedEndStateParser should not be null");
   ```
   ```suggestion
           assertNotNull(serviceTaskParser, "ServiceTaskStateParser should not 
be null");
           assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
   
           StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
           assertNotNull(choiceParser, "ChoiceStateParser should not be null");
           assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
   
           StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
           assertNotNull(compensationTriggerParser, 
"CompensationTriggerStateParser should not be null");
           assertTrue(
                   compensationTriggerParser instanceof 
CompensationTriggerStateParser,
                   "Parser should be CompensationTriggerStateParser");
   
           StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
           assertNotNull(failEndParser, "FailEndStateParser should not be 
null");
           assertTrue(failEndParser instanceof FailEndStateParser, "Parser 
should be FailEndStateParser");
   
           StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
           assertNotNull(succeedEndParser, "SucceedEndStateParser should not be 
null");
           assertTrue(succeedEndParser instanceof SucceedEndStateParser, 
"Parser should be SucceedEndStateParser");
   
           StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
           assertNotNull(subStateMachineParser, "SubStateMachineParser should 
not be null");
           assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
   
           StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
           assertNotNull(subCompensationParser, 
"CompensateSubStateMachineStateParser should not be null");
           assertTrue(
                   subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
                   "Parser should be CompensateSubStateMachineStateParser");
   
           StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
           assertNotNull(scriptTaskParser, "ScriptTaskStateParser should not be 
null");
   ```



##########
saga/seata-saga-statelang/src/test/java/org/apache/seata/saga/statelang/parser/StateParserFactoryTest.java:
##########
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.seata.saga.statelang.parser;
+
+import org.apache.seata.saga.statelang.domain.StateType;
+import org.apache.seata.saga.statelang.parser.impl.ChoiceStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensateSubStateMachineStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensationTriggerStateParser;
+import org.apache.seata.saga.statelang.parser.impl.FailEndStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ScriptTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ServiceTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.SubStateMachineParser;
+import org.apache.seata.saga.statelang.parser.impl.SucceedEndStateParser;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * test StateParserFactory
+ */
+public class StateParserFactoryTest {
+
+    @Test
+    public void testGetStateParser_ExistingTypes() {
+        StateParser serviceTaskParser = 
StateParserFactory.getStateParser(StateType.SERVICE_TASK);
+        assertNotNull("ServiceTaskStateParser should not be null");
+        assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
+
+        StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
+        assertNotNull("ChoiceStateParser should not be null", 
String.valueOf(choiceParser));
+        assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
+
+        StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
+        assertNotNull("CompensationTriggerStateParser should not be null", 
String.valueOf(compensationTriggerParser));
+        assertTrue(
+                compensationTriggerParser instanceof 
CompensationTriggerStateParser,
+                "Parser should be CompensationTriggerStateParser");
+
+        StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
+        assertNotNull("FailEndStateParser should not be null", 
String.valueOf(failEndParser));
+        assertTrue(failEndParser instanceof FailEndStateParser, "Parser should 
be FailEndStateParser");
+
+        StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
+        assertNotNull("SucceedEndStateParser should not be null", 
String.valueOf(succeedEndParser));
+        assertTrue(succeedEndParser instanceof SucceedEndStateParser, "Parser 
should be SucceedEndStateParser");
+
+        StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
+        assertNotNull("SubStateMachineParser should not be null", 
String.valueOf(subStateMachineParser));
+        assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
+
+        StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
+        assertNotNull("CompensateSubStateMachineStateParser should not be 
null", String.valueOf(subCompensationParser));
+        assertTrue(
+                subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
+                "Parser should be CompensateSubStateMachineStateParser");
+
+        StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
+        assertNotNull("ScriptTaskStateParser should not be null", 
String.valueOf(scriptTaskParser));

Review Comment:
   The `assertNotNull` call has incorrect usage. It's checking a string 
representation instead of the actual parser object. It should be:
   ```java
   assertNotNull(compensationTriggerParser, "CompensationTriggerStateParser 
should not be null");
   ```
   ```suggestion
           assertNotNull(serviceTaskParser, "ServiceTaskStateParser should not 
be null");
           assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
   
           StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
           assertNotNull(choiceParser, "ChoiceStateParser should not be null");
           assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
   
           StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
           assertNotNull(compensationTriggerParser, 
"CompensationTriggerStateParser should not be null");
           assertTrue(
                   compensationTriggerParser instanceof 
CompensationTriggerStateParser,
                   "Parser should be CompensationTriggerStateParser");
   
           StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
           assertNotNull(failEndParser, "FailEndStateParser should not be 
null");
           assertTrue(failEndParser instanceof FailEndStateParser, "Parser 
should be FailEndStateParser");
   
           StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
           assertNotNull(succeedEndParser, "SucceedEndStateParser should not be 
null");
           assertTrue(succeedEndParser instanceof SucceedEndStateParser, 
"Parser should be SucceedEndStateParser");
   
           StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
           assertNotNull(subStateMachineParser, "SubStateMachineParser should 
not be null");
           assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
   
           StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
           assertNotNull(subCompensationParser, 
"CompensateSubStateMachineStateParser should not be null");
           assertTrue(
                   subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
                   "Parser should be CompensateSubStateMachineStateParser");
   
           StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
           assertNotNull(scriptTaskParser, "ScriptTaskStateParser should not be 
null");
   ```



##########
saga/seata-saga-statelang/src/test/java/org/apache/seata/saga/statelang/parser/StateParserFactoryTest.java:
##########
@@ -0,0 +1,76 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+package org.apache.seata.saga.statelang.parser;
+
+import org.apache.seata.saga.statelang.domain.StateType;
+import org.apache.seata.saga.statelang.parser.impl.ChoiceStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensateSubStateMachineStateParser;
+import 
org.apache.seata.saga.statelang.parser.impl.CompensationTriggerStateParser;
+import org.apache.seata.saga.statelang.parser.impl.FailEndStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ScriptTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.ServiceTaskStateParser;
+import org.apache.seata.saga.statelang.parser.impl.SubStateMachineParser;
+import org.apache.seata.saga.statelang.parser.impl.SucceedEndStateParser;
+import org.junit.jupiter.api.Test;
+
+import static org.junit.jupiter.api.Assertions.assertNotNull;
+import static org.junit.jupiter.api.Assertions.assertTrue;
+
+/**
+ * test StateParserFactory
+ */
+public class StateParserFactoryTest {
+
+    @Test
+    public void testGetStateParser_ExistingTypes() {
+        StateParser serviceTaskParser = 
StateParserFactory.getStateParser(StateType.SERVICE_TASK);
+        assertNotNull("ServiceTaskStateParser should not be null");
+        assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
+
+        StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
+        assertNotNull("ChoiceStateParser should not be null", 
String.valueOf(choiceParser));
+        assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
+
+        StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
+        assertNotNull("CompensationTriggerStateParser should not be null", 
String.valueOf(compensationTriggerParser));
+        assertTrue(
+                compensationTriggerParser instanceof 
CompensationTriggerStateParser,
+                "Parser should be CompensationTriggerStateParser");
+
+        StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
+        assertNotNull("FailEndStateParser should not be null", 
String.valueOf(failEndParser));
+        assertTrue(failEndParser instanceof FailEndStateParser, "Parser should 
be FailEndStateParser");
+
+        StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
+        assertNotNull("SucceedEndStateParser should not be null", 
String.valueOf(succeedEndParser));
+        assertTrue(succeedEndParser instanceof SucceedEndStateParser, "Parser 
should be SucceedEndStateParser");
+
+        StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
+        assertNotNull("SubStateMachineParser should not be null", 
String.valueOf(subStateMachineParser));
+        assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
+
+        StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
+        assertNotNull("CompensateSubStateMachineStateParser should not be 
null", String.valueOf(subCompensationParser));
+        assertTrue(
+                subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
+                "Parser should be CompensateSubStateMachineStateParser");
+
+        StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
+        assertNotNull("ScriptTaskStateParser should not be null", 
String.valueOf(scriptTaskParser));

Review Comment:
   The `assertNotNull` call has incorrect usage. It's checking a string 
representation instead of the actual parser object. It should be:
   ```java
   assertNotNull(subStateMachineParser, "SubStateMachineParser should not be 
null");
   ```
   ```suggestion
           assertNotNull(serviceTaskParser, "ServiceTaskStateParser should not 
be null");
           assertTrue(serviceTaskParser instanceof ServiceTaskStateParser, 
"Parser should be ServiceTaskStateParser");
   
           StateParser choiceParser = 
StateParserFactory.getStateParser(StateType.CHOICE);
           assertNotNull(choiceParser, "ChoiceStateParser should not be null");
           assertTrue(choiceParser instanceof ChoiceStateParser, "Parser should 
be ChoiceStateParser");
   
           StateParser compensationTriggerParser = 
StateParserFactory.getStateParser(StateType.COMPENSATION_TRIGGER);
           assertNotNull(compensationTriggerParser, 
"CompensationTriggerStateParser should not be null");
           assertTrue(
                   compensationTriggerParser instanceof 
CompensationTriggerStateParser,
                   "Parser should be CompensationTriggerStateParser");
   
           StateParser failEndParser = 
StateParserFactory.getStateParser(StateType.FAIL);
           assertNotNull(failEndParser, "FailEndStateParser should not be 
null");
           assertTrue(failEndParser instanceof FailEndStateParser, "Parser 
should be FailEndStateParser");
   
           StateParser succeedEndParser = 
StateParserFactory.getStateParser(StateType.SUCCEED);
           assertNotNull(succeedEndParser, "SucceedEndStateParser should not be 
null");
           assertTrue(succeedEndParser instanceof SucceedEndStateParser, 
"Parser should be SucceedEndStateParser");
   
           StateParser subStateMachineParser = 
StateParserFactory.getStateParser(StateType.SUB_STATE_MACHINE);
           assertNotNull(subStateMachineParser, "SubStateMachineParser should 
not be null");
           assertTrue(subStateMachineParser instanceof SubStateMachineParser, 
"Parser should be SubStateMachineParser");
   
           StateParser subCompensationParser = 
StateParserFactory.getStateParser(StateType.SUB_MACHINE_COMPENSATION);
           assertNotNull(subCompensationParser, 
"CompensateSubStateMachineStateParser should not be null");
           assertTrue(
                   subCompensationParser instanceof 
CompensateSubStateMachineStateParser,
                   "Parser should be CompensateSubStateMachineStateParser");
   
           StateParser scriptTaskParser = 
StateParserFactory.getStateParser(StateType.SCRIPT_TASK);
           assertNotNull(scriptTaskParser, "ScriptTaskStateParser should not be 
null");
   ```



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