created tests for rule chain metadata validator

@@ -39,7 +39,6 @@ import org.thingsboard.server.common.data.rule.RuleChainMetaData;
 import org.thingsboard.server.common.data.rule.RuleNode;
 import org.thingsboard.server.dao.entity.AbstractEntityService;
 import org.thingsboard.server.dao.exception.DataValidationException;
-import org.thingsboard.server.dao.exception.IncorrectParameterException;
 import org.thingsboard.server.dao.service.DataValidator;
 import org.thingsboard.server.dao.service.PaginatedRemover;
 import org.thingsboard.server.dao.service.Validator;
@@ -52,7 +51,6 @@ import java.util.List;
 import java.util.Map;
 import java.util.Set;
 import java.util.concurrent.ExecutionException;
-import java.util.stream.Collectors;
 
 /**
  * Created by igor on 3/12/18.
@@ -217,7 +215,7 @@ public class BaseRuleChainService extends AbstractEntityService implements RuleC
         Map<Integer, Set<Integer>> connectionsMap = new HashMap<>();
         for (NodeConnectionInfo nodeConnection : connectionInfos) {
             if (nodeConnection.getFromIndex() == nodeConnection.getToIndex()) {
-                throw new IncorrectParameterException("Can't create the relation to yourself.");
+                throw new DataValidationException("Can't create the relation to yourself.");
             }
             connectionsMap
                     .computeIfAbsent(nodeConnection.getFromIndex(), from -> new HashSet<>())
@@ -232,7 +230,7 @@ public class BaseRuleChainService extends AbstractEntityService implements RuleC
         }
         for (Integer to : toList) {
             if (from == to) {
-                throw new IncorrectParameterException("Can't create circling relations in rule chain.");
+                throw new DataValidationException("Can't create circling relations in rule chain.");
             }
             validateCircles(from, connectionsMap.get(to), connectionsMap);
         }

@@ -317,6 +317,16 @@ public abstract class BaseRuleChainServiceTest extends AbstractServiceTest {
         ruleChainService.deleteRuleChainById(tenantId, savedRuleChainMetaData.getRuleChainId());
     }
 
+    @Test(expected = DataValidationException.class)
+    public void testUpdateRuleChainMetaDataWithCirclingRelation() throws Exception {
+        ruleChainService.saveRuleChainMetaData(tenantId, createRuleChainMetadataWithCirclingRelation());
+    }
+
+    @Test(expected = DataValidationException.class)
+    public void testUpdateRuleChainMetaDataWithCirclingRelation2() throws Exception {
+        ruleChainService.saveRuleChainMetaData(tenantId, createRuleChainMetadataWithCirclingRelation2());
+    }
+
     private RuleChainMetaData createRuleChainMetadata() throws Exception {
         RuleChain ruleChain = new RuleChain();
         ruleChain.setName("My RuleChain");
@@ -357,5 +367,85 @@ public abstract class BaseRuleChainServiceTest extends AbstractServiceTest {
         return ruleChainService.saveRuleChainMetaData(tenantId, ruleChainMetaData);
     }
 
+    private RuleChainMetaData createRuleChainMetadataWithCirclingRelation() throws Exception {
+        RuleChain ruleChain = new RuleChain();
+        ruleChain.setName("My RuleChain");
+        ruleChain.setTenantId(tenantId);
+        RuleChain savedRuleChain = ruleChainService.saveRuleChain(ruleChain);
+
+        RuleChainMetaData ruleChainMetaData = new RuleChainMetaData();
+        ruleChainMetaData.setRuleChainId(savedRuleChain.getId());
+
+        ObjectMapper mapper = new ObjectMapper();
+
+        RuleNode ruleNode1 = new RuleNode();
+        ruleNode1.setName("name1");
+        ruleNode1.setType("type1");
+        ruleNode1.setConfiguration(mapper.readTree("\"key1\": \"val1\""));
+
+        RuleNode ruleNode2 = new RuleNode();
+        ruleNode2.setName("name2");
+        ruleNode2.setType("type2");
+        ruleNode2.setConfiguration(mapper.readTree("\"key2\": \"val2\""));
+
+        RuleNode ruleNode3 = new RuleNode();
+        ruleNode3.setName("name3");
+        ruleNode3.setType("type3");
+        ruleNode3.setConfiguration(mapper.readTree("\"key3\": \"val3\""));
+
+        List<RuleNode> ruleNodes = new ArrayList<>();
+        ruleNodes.add(ruleNode1);
+        ruleNodes.add(ruleNode2);
+        ruleNodes.add(ruleNode3);
+        ruleChainMetaData.setFirstNodeIndex(0);
+        ruleChainMetaData.setNodes(ruleNodes);
+
+        ruleChainMetaData.addConnectionInfo(0,1,"success");
+        ruleChainMetaData.addConnectionInfo(0,2,"fail");
+        ruleChainMetaData.addConnectionInfo(1,2,"success");
+        ruleChainMetaData.addConnectionInfo(2,2,"success");
+
+        return ruleChainMetaData;
+    }
+
+    private RuleChainMetaData createRuleChainMetadataWithCirclingRelation2() throws Exception {
+        RuleChain ruleChain = new RuleChain();
+        ruleChain.setName("My RuleChain");
+        ruleChain.setTenantId(tenantId);
+        RuleChain savedRuleChain = ruleChainService.saveRuleChain(ruleChain);
+
+        RuleChainMetaData ruleChainMetaData = new RuleChainMetaData();
+        ruleChainMetaData.setRuleChainId(savedRuleChain.getId());
+
+        ObjectMapper mapper = new ObjectMapper();
+
+        RuleNode ruleNode1 = new RuleNode();
+        ruleNode1.setName("name1");
+        ruleNode1.setType("type1");
+        ruleNode1.setConfiguration(mapper.readTree("\"key1\": \"val1\""));
+
+        RuleNode ruleNode2 = new RuleNode();
+        ruleNode2.setName("name2");
+        ruleNode2.setType("type2");
+        ruleNode2.setConfiguration(mapper.readTree("\"key2\": \"val2\""));
+
+        RuleNode ruleNode3 = new RuleNode();
+        ruleNode3.setName("name3");
+        ruleNode3.setType("type3");
+        ruleNode3.setConfiguration(mapper.readTree("\"key3\": \"val3\""));
+
+        List<RuleNode> ruleNodes = new ArrayList<>();
+        ruleNodes.add(ruleNode1);
+        ruleNodes.add(ruleNode2);
+        ruleNodes.add(ruleNode3);
+        ruleChainMetaData.setFirstNodeIndex(0);
+        ruleChainMetaData.setNodes(ruleNodes);
+
+        ruleChainMetaData.addConnectionInfo(0,1,"success");
+        ruleChainMetaData.addConnectionInfo(0,2,"fail");
+        ruleChainMetaData.addConnectionInfo(1,2,"success");
+        ruleChainMetaData.addConnectionInfo(2,0,"success");
 
+        return ruleChainMetaData;
+    }
 }