Verify that the target controller id cannot be empty

Signed-off-by: SirWayne <dennis.melzer@bosch-si.com>

hawkbit-repository/src/test/java/org/eclipse/hawkbit/repository/ControllerManagementTest.java

@@ -9,10 +9,13 @@
 package org.eclipse.hawkbit.repository;
 
 import static org.fest.assertions.api.Assertions.assertThat;
+import static org.junit.Assert.fail;
 
 import java.util.ArrayList;
 import java.util.List;
 
+import javax.validation.ConstraintViolationException;
+
 import org.apache.commons.lang3.RandomStringUtils;
 import org.eclipse.hawkbit.AbstractIntegrationTest;
 import org.eclipse.hawkbit.TestDataUtil;
@@ -71,6 +74,24 @@ public class ControllerManagementTest extends AbstractIntegrationTest {
                 .getNumberOfElements()).isEqualTo(3);
     }
 
+    @Test
+    @Description("Register a controller which not exist")
+    public void testfindOrRegisterTargetIfItDoesNotexist() {
+        final Target target = controllerManagament.findOrRegisterTargetIfItDoesNotexist("AA", null);
+        assertThat(target).as("target should not be null").isNotNull();
+
+        final Target sameTarget = controllerManagament.findOrRegisterTargetIfItDoesNotexist("AA", null);
+        assertThat(target).as("Target should be the equals").isEqualTo(sameTarget);
+        assertThat(targetRepository.count()).as("Only 1 target should be registred").isEqualTo(1L);
+
+        try {
+            controllerManagament.findOrRegisterTargetIfItDoesNotexist("", null);
+            fail("target with empty controller id should not be registred");
+        } catch (final ConstraintViolationException e) {
+            // ok
+        }
+    }
+
     @Test
     @Description("Controller trys to finish an update process after it has been finished by an error action status.")
     public void tryToFinishUpdateProcessMoreThenOnce() {

hawkbit-repository/src/test/java/org/eclipse/hawkbit/repository/TargetManagementTest.java

@@ -26,6 +26,7 @@ import java.util.Set;
 import java.util.stream.Collectors;
 
 import javax.persistence.Query;
+import javax.validation.ConstraintViolationException;
 
 import org.eclipse.hawkbit.AbstractIntegrationTest;
 import org.eclipse.hawkbit.TestDataUtil;
@@ -65,6 +66,17 @@ public class TargetManagementTest extends AbstractIntegrationTest {
         }
     }
 
+    @Test
+    @Description("Verify that a target with empty controller id cannot be created")
+    public void createTarget() {
+        try {
+            targetManagement.createTarget(new Target(""));
+            fail("target with empty controller id should not be created");
+        } catch (final ConstraintViolationException e) {
+            // ok
+        }
+    }
+
     @Test
     @Description("Ensures that targets can assigned and unassigned to a target tag. Not exists target will be ignored for the assignment.")
     public void assignAndUnassignTargetsToTag() {