RefUpdateValidatorTest: validate result of ref update

Change-Id: I0b4e13bb43f5e4a150d045f4ba3ceafcf75c1307

src/test/java/com/gerritforge/gerrit/globalrefdb/validation/RefUpdateValidatorTest.java

diff --git a/src/test/java/com/gerritforge/gerrit/globalrefdb/validation/RefUpdateValidatorTest.java b/src/test/java/com/gerritforge/gerrit/globalrefdb/validation/RefUpdateValidatorTest.java
index 3c63d13..35382b2 100644
--- a/src/test/java/com/gerritforge/gerrit/globalrefdb/validation/RefUpdateValidatorTest.java
+++ b/src/test/java/com/gerritforge/gerrit/globalrefdb/validation/RefUpdateValidatorTest.java
@@ -15,6 +15,7 @@
 package com.gerritforge.gerrit.globalrefdb.validation;
 
 import static com.google.common.truth.Truth.assertThat;
+import static org.junit.Assert.assertEquals;
 import static org.mockito.ArgumentMatchers.any;
 import static org.mockito.ArgumentMatchers.anyString;
 import static org.mockito.Mockito.doReturn;
@@ -231,7 +232,7 @@
 
     Result result =
         refUpdateValidator.executeRefUpdate(refUpdate, () -> Result.NEW, rollbackFunction);
-
+    assertEquals(Result.LOCK_FAILURE, result);
     verify(rollbackFunction, times(1)).invoke(any());
   }