github.com/linapex/ethereum-go-chinese@v0.0.0-20190316121929-f8b7a73c3fa1/core/bloombits/scheduler_test.go (about)

     1  
     2  //<developer>
     3  //    <name>linapex 曹一峰</name>
     4  //    <email>linapex@163.com</email>
     5  //    <wx>superexc</wx>
     6  //    <qqgroup>128148617</qqgroup>
     7  //    <url>https://jsq.ink</url>
     8  //    <role>pku engineer</role>
     9  //    <date>2019-03-16 19:16:35</date>
    10  //</624450078345531392>
    11  
    12  
    13  package bloombits
    14  
    15  import (
    16  	"bytes"
    17  	"math/big"
    18  	"math/rand"
    19  	"sync"
    20  	"sync/atomic"
    21  	"testing"
    22  	"time"
    23  )
    24  
    25  //测试调度程序可以对检索请求进行重复数据消除和转发
    26  //底层的获取器和服务响应返回，与并发无关
    27  //请求客户机或服务数据获取程序。
    28  func TestSchedulerSingleClientSingleFetcher(t *testing.T) { testScheduler(t, 1, 1, 5000) }
    29  func TestSchedulerSingleClientMultiFetcher(t *testing.T)  { testScheduler(t, 1, 10, 5000) }
    30  func TestSchedulerMultiClientSingleFetcher(t *testing.T)  { testScheduler(t, 10, 1, 5000) }
    31  func TestSchedulerMultiClientMultiFetcher(t *testing.T)   { testScheduler(t, 10, 10, 5000) }
    32  
    33  func testScheduler(t *testing.T, clients int, fetchers int, requests int) {
    34  	f := newScheduler(0)
    35  
    36  //创建一批处理程序goroutine，以响应bloom位请求和
    37  //把它们交给调度。
    38  	var fetchPend sync.WaitGroup
    39  	fetchPend.Add(fetchers)
    40  	defer fetchPend.Wait()
    41  
    42  	fetch := make(chan *request, 16)
    43  	defer close(fetch)
    44  
    45  	var delivered uint32
    46  	for i := 0; i < fetchers; i++ {
    47  		go func() {
    48  			defer fetchPend.Done()
    49  
    50  			for req := range fetch {
    51  				time.Sleep(time.Duration(rand.Intn(int(100 * time.Microsecond))))
    52  				atomic.AddUint32(&delivered, 1)
    53  
    54  				f.deliver([]uint64{
    55  req.section + uint64(requests), //未请求的数据（确保不超出界限）
    56  req.section,                    //请求数据
    57  req.section,                    //重复的数据（确保不会双重关闭任何内容）
    58  				}, [][]byte{
    59  					{},
    60  					new(big.Int).SetUint64(req.section).Bytes(),
    61  					new(big.Int).SetUint64(req.section).Bytes(),
    62  				})
    63  			}
    64  		}()
    65  	}
    66  //启动一批goroutine以同时运行计划任务
    67  	quit := make(chan struct{})
    68  
    69  	var pend sync.WaitGroup
    70  	pend.Add(clients)
    71  
    72  	for i := 0; i < clients; i++ {
    73  		go func() {
    74  			defer pend.Done()
    75  
    76  			in := make(chan uint64, 16)
    77  			out := make(chan []byte, 16)
    78  
    79  			f.run(in, fetch, out, quit, &pend)
    80  
    81  			go func() {
    82  				for j := 0; j < requests; j++ {
    83  					in <- uint64(j)
    84  				}
    85  				close(in)
    86  			}()
    87  
    88  			for j := 0; j < requests; j++ {
    89  				bits := <-out
    90  				if want := new(big.Int).SetUint64(uint64(j)).Bytes(); !bytes.Equal(bits, want) {
    91  					t.Errorf("vector %d: delivered content mismatch: have %x, want %x", j, bits, want)
    92  				}
    93  			}
    94  		}()
    95  	}
    96  	pend.Wait()
    97  
    98  	if have := atomic.LoadUint32(&delivered); int(have) != requests {
    99  		t.Errorf("request count mismatch: have %v, want %v", have, requests)
   100  	}
   101  }
   102