Add unit test for NoOpResult

server/src/test/java/org/elasticsearch/index/engine/InternalEngineTests.java

@@ -4127,7 +4127,7 @@ public class InternalEngineTests extends EngineTestCase {
         assertThat(noOpResult.getSeqNo(), equalTo(seqNo));
         assertThat(noOpResult.getTerm(), equalTo(term));
         engine.refresh("test");
-        Engine.DeleteResult deleteResult = engine.delete(replicaDeleteForDoc("id", 1, 2, randomNonNegativeLong()));
+        Engine.DeleteResult deleteResult = engine.delete(replicaDeleteForDoc("id", 1, seqNo + between(1, 1000), randomNonNegativeLong()));
         assertThat(deleteResult.getFailure(), nullValue());
         engine.refresh("test");
     }
@@ -4153,10 +4153,11 @@ public class InternalEngineTests extends EngineTestCase {
                     assertThat(delete.getFailure(), nullValue());
                     break;
                 case NO_OP:
-                    Engine.NoOpResult noOp = engine.noOp(new Engine.NoOp(i, primaryTerm.get(),
+                    long seqNo = i;
+                    Engine.NoOpResult noOp = engine.noOp(new Engine.NoOp(seqNo, primaryTerm.get(),
                         randomFrom(Engine.Operation.Origin.values()), randomNonNegativeLong(), ""));
                     assertThat(noOp.getTerm(), equalTo(primaryTerm.get()));
-                    assertThat(noOp.getSeqNo(), equalTo((long) i));
+                    assertThat(noOp.getSeqNo(), equalTo(seqNo));
                     assertThat(noOp.getFailure(), nullValue());
                     break;
                 default: