shoothzj commented on code in PR #4104:
URL: 
https://github.com/apache/servicecomb-java-chassis/pull/4104#discussion_r1419018440


##########
metrics/metrics-core/src/test/java/org/apache/servicecomb/metrics/core/TestOsMeterInitializer.java:
##########
@@ -55,64 +58,57 @@ public void init() {
     list.add("13  1 1 1 1 1 1 1 1 0 0 1 1 1 1 1 1 1 1 1 1 1 1 1");
     list.add("useless");
     list.add("eth0: 0 0    0    0    0     0          0          0         0 0 
   0      0     0     0    0    0");
-    new MockUp<CharSource>() {
-      //Files.readFirstLine
-      @Mock
-      public String readFirstLine() {
-        return list.get(0);
-      }
-    };
-    new MockUp<FileUtils>() {
-      @Mock
-      public List<String> readLines(File file, Charset encoding) {
-        return list;
-      }
-    };
 
-    OsMetersInitializer osMetersInitializer = new OsMetersInitializer();
-    osMetersInitializer.init(registry, eventBus, null);
+    try (MockedStatic<FileUtils> fileUtilsMockedStatic = 
Mockito.mockStatic(FileUtils.class);
+         MockedStatic<CharSource> charSourceStatic = 
Mockito.mockStatic(CharSource.class)) {
+      fileUtilsMockedStatic.when(() -> {
+        FileUtils.readLines(Mockito.any(File.class), 
Mockito.any(Charset.class));
+      }).thenReturn(list);
+      OsMetersInitializer osMetersInitializer = new OsMetersInitializer();
+      osMetersInitializer.init(registry, eventBus, null);
 
-    OsMeter osMeter = osMetersInitializer.getOsMeter();
-    SystemMeter systemMeter = osMeter.getCpuMeter();
-    OperatingSystemMXBean osBean = Mockito.mock(OperatingSystemMXBean.class);
-    Mockito.when(osBean.getCpuLoad()).thenReturn(3.2D);
-    Mockito.when(osBean.getProcessCpuLoad()).thenReturn(1.2D);
-    systemMeter.setOsBean(osBean);
-    NetMeter netMeter = osMeter.getNetMeter();
-    netMeter.setOsLinux(true);
+      OsMeter osMeter = osMetersInitializer.getOsMeter();
+      SystemMeter systemMeter = osMeter.getCpuMeter();
+      OperatingSystemMXBean osBean = Mockito.mock(OperatingSystemMXBean.class);
+      Mockito.when(osBean.getCpuLoad()).thenReturn(3.2D);
+      Mockito.when(osBean.getProcessCpuLoad()).thenReturn(1.2D);
+      systemMeter.setOsBean(osBean);
+      NetMeter netMeter = osMeter.getNetMeter();
+      netMeter.setOsLinux(true);
 
-    osMetersInitializer.poll(System.currentTimeMillis(), 1000);
+      osMetersInitializer.poll(System.currentTimeMillis(), 1000);
 
-    MeasurementTree tree = new MeasurementTree();
-    MeasurementGroupConfig group = new MeasurementGroupConfig();
-    group.addGroup(OsMeter.OS_NAME, OsMeter.OS_TYPE);
-    tree.from(registry.getMeters().iterator(), group);
+      MeasurementTree tree = new MeasurementTree();
+      MeasurementGroupConfig group = new MeasurementGroupConfig();
+      group.addGroup(OsMeter.OS_NAME, OsMeter.OS_TYPE);
+      tree.from(registry.getMeters().iterator(), group);
 
-    Assertions.assertEquals(1.2D,
-        tree.findChild(OsMeter.OS_NAME, 
SystemMeter.PROCESS_CPU_USAGE).summary(), 0.0);
-    Assertions.assertEquals(3.2D,
-        tree.findChild(OsMeter.OS_NAME, SystemMeter.CPU_USAGE).summary(), 0.0);
+      Assertions.assertEquals(1.2D,
+              tree.findChild(OsMeter.OS_NAME, 
SystemMeter.PROCESS_CPU_USAGE).summary(), 0.0);
+      Assertions.assertEquals(3.2D,
+              tree.findChild(OsMeter.OS_NAME, 
SystemMeter.CPU_USAGE).summary(), 0.0);
 
-    Map<String, InterfaceUsage> interfaceInfoMap = 
netMeter.getInterfaceUsageMap();
-    Assertions.assertEquals(1, interfaceInfoMap.size());
-    InterfaceUsage eth0 = interfaceInfoMap.get("eth0");
-    // recv Bps
-    Assertions.assertEquals(0L, eth0.getReceive().getLastValue());
-    Assertions.assertEquals(0, eth0.getReceive().getRate(), 0.0);
-    Assertions.assertEquals(0, eth0.getReceive().getIndex());
-    // send Bps
-    Assertions.assertEquals(0L, eth0.getSend().getLastValue());
-    Assertions.assertEquals(0, eth0.getSend().getRate(), 0.0);
-    Assertions.assertEquals(8, eth0.getSend().getIndex());
+      Map<String, InterfaceUsage> interfaceInfoMap = 
netMeter.getInterfaceUsageMap();
+      Assertions.assertEquals(1, interfaceInfoMap.size());

Review Comment:
   plz don't change this intent



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