add ut

Author: liuxiaocs7

hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMetricsRegionServer.java

@@ -364,4 +364,10 @@ public void testThrottleExceptionMetricsIntegration() {
       "RpcThrottlingException_Type_ReadCapacityUnitExceeded_User_unknown_Table_unknown", 1L,
       serverSource);
   }
+
+  @Test
+  public void testSplitRequest() {
+    rsm.incrSplitRequest(null);
+    HELPER.assertCounter("splitRequestCount", 1, serverSource);
+  }
 }

hbase-server/src/test/java/org/apache/hadoop/hbase/regionserver/TestMetricsTableAggregate.java

@@ -161,6 +161,13 @@ public void testCompaction() {
     HELPER.assertCounter(pre + "majorCompactedoutputBytes", 500, agg);
   }
 
+  @Test
+  public void testSplitRequest() {
+    rsm.incrSplitRequest(null);
+    rsm.incrSplitRequest(tableName);
+    HELPER.assertCounter(pre + "splitRequestCount", 1, agg);
+  }
+
   private void update(AtomicBoolean succ, int round, CyclicBarrier barrier) {
     try {
       for (int i = 0; i < round; i++) {