github.com/lukso-network/go-ethereum@v1.8.22/p2p/protocols/reporter_test.go (about)

     1  // Copyright 2018 The go-ethereum Authors
     2  // This file is part of the go-ethereum library.
     3  //
     4  // The go-ethereum library is free software: you can redistribute it and/or modify
     5  // it under the terms of the GNU Lesser General Public License as published by
     6  // the Free Software Foundation, either version 3 of the License, or
     7  // (at your option) any later version.
     8  //
     9  // The go-ethereum library is distributed in the hope that it will be useful,
    10  // but WITHOUT ANY WARRANTY; without even the implied warranty of
    11  // MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
    12  // GNU Lesser General Public License for more details.
    13  //
    14  // You should have received a copy of the GNU Lesser General Public License
    15  // along with the go-ethereum library. If not, see <http://www.gnu.org/licenses/>.
    16  
    17  package protocols
    18  
    19  import (
    20  	"io/ioutil"
    21  	"os"
    22  	"path/filepath"
    23  	"testing"
    24  	"time"
    25  
    26  	"github.com/ethereum/go-ethereum/log"
    27  )
    28  
    29  //TestReporter tests that the metrics being collected for p2p accounting
    30  //are being persisted and available after restart of a node.
    31  //It simulates restarting by just recreating the DB as if the node had restarted.
    32  func TestReporter(t *testing.T) {
    33  	//create a test directory
    34  	dir, err := ioutil.TempDir("", "reporter-test")
    35  	if err != nil {
    36  		t.Fatal(err)
    37  	}
    38  	defer os.RemoveAll(dir)
    39  
    40  	//setup the metrics
    41  	log.Debug("Setting up metrics first time")
    42  	reportInterval := 5 * time.Millisecond
    43  	metrics := SetupAccountingMetrics(reportInterval, filepath.Join(dir, "test.db"))
    44  	log.Debug("Done.")
    45  
    46  	//do some metrics
    47  	mBalanceCredit.Inc(12)
    48  	mBytesCredit.Inc(34)
    49  	mMsgDebit.Inc(9)
    50  
    51  	//give the reporter time to write the metrics to DB
    52  	time.Sleep(20 * time.Millisecond)
    53  
    54  	//set the metrics to nil - this effectively simulates the node having shut down...
    55  	mBalanceCredit = nil
    56  	mBytesCredit = nil
    57  	mMsgDebit = nil
    58  	//close the DB also, or we can't create a new one
    59  	metrics.Close()
    60  
    61  	//setup the metrics again
    62  	log.Debug("Setting up metrics second time")
    63  	metrics = SetupAccountingMetrics(reportInterval, filepath.Join(dir, "test.db"))
    64  	defer metrics.Close()
    65  	log.Debug("Done.")
    66  
    67  	//now check the metrics, they should have the same value as before "shutdown"
    68  	if mBalanceCredit.Count() != 12 {
    69  		t.Fatalf("Expected counter to be %d, but is %d", 12, mBalanceCredit.Count())
    70  	}
    71  	if mBytesCredit.Count() != 34 {
    72  		t.Fatalf("Expected counter to be %d, but is %d", 23, mBytesCredit.Count())
    73  	}
    74  	if mMsgDebit.Count() != 9 {
    75  		t.Fatalf("Expected counter to be %d, but is %d", 9, mMsgDebit.Count())
    76  	}
    77  }