1 files changed, 25 insertions, 0 deletions
diff --git a/common-parameters/src/test/java/org/onap/policy/common/parameters/TestParameterService.java b/common-parameters/src/test/java/org/onap/policy/common/parameters/TestParameterService.java
index 0b7e46ca..2dad4283 100644
--- a/common-parameters/src/test/java/org/onap/policy/common/parameters/TestParameterService.java
+++ b/common-parameters/src/test/java/org/onap/policy/common/parameters/TestParameterService.java
@@ -57,9 +57,34 @@ public class TestParameterService {
             assertEquals("\"Empty Group\" already registered in parameter service", e.getMessage());
         }
 
+        try {
+            ParameterService.register(new EmptyParameterGroup("Empty Group"), false);
+            fail("this test should throw an exception");
+        }
+        catch (ParameterRuntimeException e) {
+            assertEquals("\"Empty Group\" already registered in parameter service", e.getMessage());
+        }
+
+        ParameterService.register(new EmptyParameterGroup("Empty Group"), true);
+        assertTrue(ParameterService.contains("Empty Group"));
+
         ParameterService.deregister("Empty Group");
         assertFalse(ParameterService.contains("Empty Group"));
 
+        ParameterService.register(new EmptyParameterGroup("Empty Group"), true);
+        assertTrue(ParameterService.contains("Empty Group"));
+
+        ParameterService.deregister("Empty Group");
+        assertFalse(ParameterService.contains("Empty Group"));
+
+        EmptyParameterGroup epg = new EmptyParameterGroup("Empty Group");
+        ParameterService.register(epg);
+        assertTrue(ParameterService.contains("Empty Group"));
+        assertNotNull(ParameterService.get("Empty Group"));
+
+        ParameterService.deregister(epg);
+        assertFalse(ParameterService.contains("Empty Group"));
+
         try {
             ParameterService.deregister("Empty Group");
             fail("this test should throw an exception");