diff --git a/dsms-engine-application/src/test/java/com/dsms/common/util/PrometheusUtilTest.java b/dsms-engine-application/src/test/java/com/dsms/common/util/PrometheusUtilTest.java
index 520c17593c9974e6b70f1e23ab1ef66a6a4af13e..c1cbfc1171b6941b907294eabe75c2e1caa93904 100644
--- a/dsms-engine-application/src/test/java/com/dsms/common/util/PrometheusUtilTest.java
+++ b/dsms-engine-application/src/test/java/com/dsms/common/util/PrometheusUtilTest.java
@@ -3,14 +3,25 @@ package com.dsms.common.util;
 import static org.junit.jupiter.api.Assertions.assertEquals;
 
 import com.dsms.common.constant.PromQL;
+import com.google.gson.JsonSyntaxException;
+import org.junit.jupiter.api.Assertions;
 import org.junit.jupiter.api.Test;
 
-class PrometheusUtilTest {
+class PrometheusUtilsTest {
 
     @Test
-    public void testPrometheusUtil() {
+    public void testPrometheusUtils() {
         String exceptResult = "rate(node_network_receive_drop_total{instance=\"ceph1\"}[1m])";
         assertEquals(exceptResult, PrometheusUtils.getFormatPromQL(PromQL.NODE_NETWORK_RECEIVE_DROP_RATE, new String[]{"ceph1"}));
+
+
+        String noData = "{\"status\":\"success\",\"data1\":{\"resultType\":\"vector\",\"result\":[{\"metric\":{},\"values\":[1742977682.864,\"+Inf\"]}]}}";
+        Assertions.assertThrows(JsonSyntaxException.class, () -> PrometheusUtils.convertQueryResultString(noData));
+
+
+        String noResultType = "{\"status\":\"success\",\"data\":{\"resultType\":\"test\",\"result1\":[{\"metric\":{},\"values1\":[1742977682.864,\"+Inf\"]}]}}";
+        Assertions.assertThrows(JsonSyntaxException.class, () -> PrometheusUtils.convertQueryResultString(noResultType));
+
     }
 
 }
\ No newline at end of file