fix test

Author: JulyWindK

pkg/agent/qrm-plugins/memory/dynamicpolicy/userwatermark/reclaimer_test.go

@@ -594,3 +594,32 @@ func TestUserWatermarkReclaimer_ReclaimGetStatsFailed(t *testing.T) {
 	assert.Contains(t, result.Reason, "Get memory reclaimStats failed")
 	assert.Equal(t, uint64(0), result.ReclaimedSize)
 }
+
+func TestUserWatermarkReclaimer_UpdateInstanceInfo(t *testing.T) {
+	t.Parallel()
+
+	// Create test dependencies
+	dynamicConf := dynamicconfig.NewDynamicAgentConfiguration()
+	instance := ReclaimInstance{CgroupPath: "/sys/fs/cgroup/memory/test"}
+	r := NewUserWatermarkReclaimer(instance, (*metaserver.MetaServer)(nil), metrics.DummyMetrics{}, dynamicConf)
+
+	// Update with new container info
+	newContainerInfo := &types.ContainerInfo{
+		PodUID:        "new-pod-uid",
+		PodNamespace:  "new-namespace",
+		PodName:       "new-pod-name",
+		ContainerName: "new-container-name",
+		QoSLevel:      "new-qos-level",
+		Labels:        map[string]string{"key": "value"},
+	}
+
+	r.UpdateInstanceInfo(ReclaimInstance{
+		ContainerInfo: newContainerInfo,
+		CgroupPath:    "/sys/fs/cgroup/memory/new-path", // This shouldn't change the cgroupPath
+	})
+
+	// Verify container info was updated
+	assert.Equal(t, newContainerInfo, r.containerInfo)
+	// Verify cgroupPath wasn't changed (UpdateInstanceInfo shouldn't modify it)
+	assert.Equal(t, "/sys/fs/cgroup/memory/test", r.cgroupPath)
+}