services/ws/event_source_test.go

   1 package main
   2
   3 import (
   4         "database/sql"
   5         "fmt"
   6         "sync"
   7         "time"
   8
   9         "git.curoverse.com/arvados.git/sdk/go/config"
  10         check "gopkg.in/check.v1"
  11 )
  12
  13 var _ = check.Suite(&eventSourceSuite{})
  14
  15 type eventSourceSuite struct{}
  16
  17 func testDBConfig() pgConfig {
  18         var railsDB struct {
  19                 Test struct {
  20                         Database string
  21                         Username string
  22                         Password string
  23                         Host     string
  24                 }
  25         }
  26         err := config.LoadFile(&railsDB, "../api/config/database.yml")
  27         if err != nil {
  28                 panic(err)
  29         }
  30         cfg := pgConfig{
  31                 "dbname":   railsDB.Test.Database,
  32                 "host":     railsDB.Test.Host,
  33                 "password": railsDB.Test.Password,
  34                 "user":     railsDB.Test.Username,
  35         }
  36         return cfg
  37 }
  38
  39 func testDB() *sql.DB {
  40         db, err := sql.Open("postgres", testDBConfig().ConnectionString())
  41         if err != nil {
  42                 panic(err)
  43         }
  44         return db
  45 }
  46
  47 func (*eventSourceSuite) TestEventSource(c *check.C) {
  48         cfg := testDBConfig()
  49         db := testDB()
  50         pges := &pgEventSource{
  51                 DataSource: cfg.ConnectionString(),
  52                 QueueSize:  4,
  53         }
  54         go pges.Run()
  55         sinks := make([]eventSink, 18)
  56         for i := range sinks {
  57                 sinks[i] = pges.NewSink()
  58         }
  59
  60         pges.waitReady()
  61         defer pges.cancel()
  62
  63         done := make(chan bool, 1)
  64
  65         go func() {
  66                 for i := range sinks {
  67                         _, err := db.Exec(fmt.Sprintf(`NOTIFY logs, '%d'`, i))
  68                         if err != nil {
  69                                 done <- true
  70                                 c.Fatal(err)
  71                                 return
  72                         }
  73                 }
  74         }()
  75
  76         var wg sync.WaitGroup
  77         wg.Add(len(sinks))
  78         for si, s := range sinks {
  79                 go func(si int, s eventSink) {
  80                         defer wg.Done()
  81                         defer sinks[si].Stop()
  82                         for i := 0; i <= si; i++ {
  83                                 ev := <-sinks[si].Channel()
  84                                 c.Logf("sink %d received event %d", si, i)
  85                                 c.Check(ev.LogID, check.Equals, uint64(i))
  86                                 row := ev.Detail()
  87                                 if i == 0 {
  88                                         // no matching row, null event
  89                                         c.Check(row, check.IsNil)
  90                                 } else {
  91                                         c.Check(row, check.NotNil)
  92                                         c.Check(row.ID, check.Equals, uint64(i))
  93                                         c.Check(row.UUID, check.Not(check.Equals), "")
  94                                 }
  95                         }
  96                 }(si, s)
  97         }
  98         go func() {
  99                 wg.Wait()
 100                 done <- true
 101         }()
 102
 103         select {
 104         case <-done:
 105         case <-time.After(10 * time.Second):
 106                 c.Fatal("timed out")
 107         }
 108 }