Fixing test failures

components/device-mgt/org.wso2.carbon.device.mgt.core/src/main/java/org/wso2/carbon/device/mgt/core/service/GroupManagementProviderServiceImpl.java

@@ -213,8 +213,10 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
         try {
             GroupManagementDAOFactory.openConnection();
             deviceGroup = this.groupDAO.getGroup(groupId, CarbonContext.getThreadLocalCarbonContext().getTenantId());
+            if(deviceGroup != null && deviceGroup.getGroupId() > 0) {
                 deviceGroup.setGroupProperties(this.groupDAO.getAllGroupProperties(deviceGroup.getGroupId(),
                                                                                    CarbonContext.getThreadLocalCarbonContext().getTenantId()));
+            }
         } catch (GroupManagementDAOException e) {
             String msg = "Error occurred while obtaining group '" + groupId + "'";
             log.error(msg, e);
@@ -250,8 +252,10 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
         try {
             GroupManagementDAOFactory.openConnection();
             deviceGroup = this.groupDAO.getGroup(groupName, CarbonContext.getThreadLocalCarbonContext().getTenantId());
+            if(deviceGroup != null && deviceGroup.getGroupId() > 0) {
                 deviceGroup.setGroupProperties(this.groupDAO.getAllGroupProperties(deviceGroup.getGroupId(),
                                                                                    CarbonContext.getThreadLocalCarbonContext().getTenantId()));
+            }
         } catch (GroupManagementDAOException e) {
             String msg = "Error occurred while obtaining group with name: '" + groupName + "'";
             log.error(msg, e);
@@ -280,9 +284,11 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
             int tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
             GroupManagementDAOFactory.openConnection();
             deviceGroups = this.groupDAO.getGroups(tenantId);
+            if(deviceGroups != null && !deviceGroups.isEmpty()) {
                 for (DeviceGroup group : deviceGroups) {
                     group.setGroupProperties(this.groupDAO.getAllGroupProperties(group.getGroupId(), tenantId));
                 }
+            }
         } catch (GroupManagementDAOException e) {
             String msg = "Error occurred while retrieving all groups in tenant";
             log.error(msg, e);
@@ -317,9 +323,11 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
             int tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
             GroupManagementDAOFactory.openConnection();
             deviceGroups = this.groupDAO.getGroups(request, tenantId);
+            if(deviceGroups != null && !deviceGroups.isEmpty()) {
                 for (DeviceGroup group : deviceGroups) {
                     group.setGroupProperties(this.groupDAO.getAllGroupProperties(group.getGroupId(), tenantId));
                 }
+            }
         } catch (GroupManagementDAOException e) {
             String msg = "Error occurred while retrieving all groups in tenant";
             log.error(msg, e);
@@ -365,7 +373,9 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
             }
             deviceGroups = this.groupDAO.getGroups(roleList, tenantId);
             for (DeviceGroup deviceGroup : deviceGroups) {
+                if(deviceGroup != null && deviceGroup.getGroupId() > 0) {
                     deviceGroup.setGroupProperties(this.groupDAO.getAllGroupProperties(deviceGroup.getGroupId(), tenantId));
+                }
                 groups.put(deviceGroup.getGroupId(), deviceGroup);
             }
         } catch (UserStoreException | SQLException | GroupManagementDAOException e) {
@@ -428,9 +438,11 @@ public class GroupManagementProviderServiceImpl implements GroupManagementProvid
             int tenantId = CarbonContext.getThreadLocalCarbonContext().getTenantId();
             GroupManagementDAOFactory.openConnection();
             allMatchingGroups = this.groupDAO.getGroups(request, allDeviceGroupIdsOfUser, tenantId);
+            if(allMatchingGroups != null && !allMatchingGroups.isEmpty()) {
                 for (DeviceGroup group : allMatchingGroups) {
                     group.setGroupProperties(this.groupDAO.getAllGroupProperties(group.getGroupId(), tenantId));
                 }
+            }
         } catch (GroupManagementDAOException | SQLException e) {
             String msg = "Error occurred while retrieving all groups in tenant";
             log.error(msg, e);

components/policy-mgt/org.wso2.carbon.policy.mgt.core/src/test/resources/sql/CreateH2TestDB.sql

@@ -55,6 +55,14 @@ CREATE TABLE IF NOT EXISTS DM_DEVICE_PROPERTIES (
      PRIMARY KEY (DEVICE_TYPE_NAME, DEVICE_IDENTIFICATION, PROPERTY_NAME)
 );
 
+CREATE TABLE IF NOT EXISTS GROUP_PROPERTIES (
+     GROUP_ID INTEGER NOT NULL,
+     PROPERTY_NAME VARCHAR(100) DEFAULT 0,
+     PROPERTY_VALUE VARCHAR(100) DEFAULT NULL,
+     TENANT_ID VARCHAR(100),
+     PRIMARY KEY (GROUP_ID, PROPERTY_NAME, TENANT_ID)
+);
+
 DROP TABLE IF EXISTS DM_DEVICE_GROUP_MAP;
 CREATE TABLE IF NOT EXISTS DM_DEVICE_GROUP_MAP (
   ID        INTEGER AUTO_INCREMENT NOT NULL,