func (s *S) TestErrors(c *C) { doc := bson.M{"foo": 1} tests := []txn.Op{{ C: "c", Id: 0, }, { C: "c", Id: 0, Insert: doc, Remove: true, }, { C: "c", Id: 0, Insert: doc, Update: doc, }, { C: "c", Id: 0, Update: doc, Remove: true, }, { C: "c", Assert: doc, }, { Id: 0, Assert: doc, }} txn.SetChaos(txn.Chaos{KillChance: 1.0}) for _, op := range tests { c.Logf("op: %v", op) err := s.runner.Run([]txn.Op{op}, "", nil) c.Assert(err, ErrorMatches, "error in transaction op 0: .*") } }
func (s *S) TestTxnQueueStashStressTest(c *C) { txn.SetChaos(txn.Chaos{ SlowdownChance: 0.3, Slowdown: 50 * time.Millisecond, }) defer txn.SetChaos(txn.Chaos{}) // So we can run more iterations of the test in less time. txn.SetDebug(false) const runners = 10 const inserts = 10 const repeat = 100 for r := 0; r < repeat; r++ { var wg sync.WaitGroup wg.Add(runners) for i := 0; i < runners; i++ { go func(i, r int) { defer wg.Done() session := s.session.New() defer session.Close() runner := txn.NewRunner(s.tc.With(session)) for j := 0; j < inserts; j++ { ops := []txn.Op{{ C: "accounts", Id: fmt.Sprintf("insert-%d-%d", r, j), Insert: bson.M{ "added-by": i, }, }} err := runner.Run(ops, "", nil) if err != txn.ErrAborted { c.Check(err, IsNil) } } }(i, r) } wg.Wait() } }
func (s *S) SetUpTest(c *C) { txn.SetChaos(txn.Chaos{}) txn.SetLogger(c) txn.SetDebug(true) s.MgoSuite.SetUpTest(c) s.db = s.session.DB("test") s.tc = s.db.C("tc") s.sc = s.db.C("tc.stash") s.accounts = s.db.C("accounts") s.runner = txn.NewRunner(s.tc) }
func (s *S) TestQueueStashing(c *C) { txn.SetChaos(txn.Chaos{ KillChance: 1, Breakpoint: "set-applying", }) opses := [][]txn.Op{{{ C: "accounts", Id: 0, Insert: M{"balance": 100}, }}, {{ C: "accounts", Id: 0, Remove: true, }}, {{ C: "accounts", Id: 0, Insert: M{"balance": 200}, }}, {{ C: "accounts", Id: 0, Update: M{"$inc": M{"balance": 100}}, }}} var last bson.ObjectId for _, ops := range opses { last = bson.NewObjectId() err := s.runner.Run(ops, last, nil) c.Assert(err, Equals, txn.ErrChaos) } txn.SetChaos(txn.Chaos{}) err := s.runner.Resume(last) c.Assert(err, IsNil) var account Account err = s.accounts.FindId(0).One(&account) c.Assert(err, IsNil) c.Assert(account.Balance, Equals, 300) }
func (s *S) TestTxnQueueStressTest(c *C) { txn.SetChaos(txn.Chaos{ SlowdownChance: 0.3, Slowdown: 50 * time.Millisecond, }) defer txn.SetChaos(txn.Chaos{}) // So we can run more iterations of the test in less time. txn.SetDebug(false) err := s.accounts.Insert(M{"_id": 0, "balance": 0}, M{"_id": 1, "balance": 0}) c.Assert(err, IsNil) // Run half of the operations changing account 0 and then 1, // and the other half in the opposite order. ops01 := []txn.Op{{ C: "accounts", Id: 0, Update: M{"$inc": M{"balance": 1}}, }, { C: "accounts", Id: 1, Update: M{"$inc": M{"balance": 1}}, }} ops10 := []txn.Op{{ C: "accounts", Id: 1, Update: M{"$inc": M{"balance": 1}}, }, { C: "accounts", Id: 0, Update: M{"$inc": M{"balance": 1}}, }} ops := [][]txn.Op{ops01, ops10} const runners = 4 const changes = 1000 var wg sync.WaitGroup wg.Add(runners) for n := 0; n < runners; n++ { n := n go func() { defer wg.Done() for i := 0; i < changes; i++ { err = s.runner.Run(ops[n%2], "", nil) c.Assert(err, IsNil) } }() } wg.Wait() for id := 0; id < 2; id++ { var account Account err = s.accounts.FindId(id).One(&account) if account.Balance != runners*changes { c.Errorf("Account should have balance of %d, got %d", runners*changes, account.Balance) } } }
func (s *S) TestPurgeMissing(c *C) { txn.SetChaos(txn.Chaos{ KillChance: 1, Breakpoint: "set-applying", }) err := s.accounts.Insert(M{"_id": 0, "balance": 100}) c.Assert(err, IsNil) err = s.accounts.Insert(M{"_id": 1, "balance": 100}) c.Assert(err, IsNil) ops1 := []txn.Op{{ C: "accounts", Id: 3, Insert: M{"balance": 100}, }} ops2 := []txn.Op{{ C: "accounts", Id: 0, Remove: true, }, { C: "accounts", Id: 1, Update: M{"$inc": M{"balance": 100}}, }, { C: "accounts", Id: 2, Insert: M{"balance": 100}, }} first := bson.NewObjectId() c.Logf("---- Running ops1 under transaction %q, to be canceled by chaos", first.Hex()) err = s.runner.Run(ops1, first, nil) c.Assert(err, Equals, txn.ErrChaos) last := bson.NewObjectId() c.Logf("---- Running ops2 under transaction %q, to be canceled by chaos", last.Hex()) err = s.runner.Run(ops2, last, nil) c.Assert(err, Equals, txn.ErrChaos) c.Logf("---- Removing transaction %q", last.Hex()) err = s.tc.RemoveId(last) c.Assert(err, IsNil) c.Logf("---- Disabling chaos and attempting to resume all") txn.SetChaos(txn.Chaos{}) err = s.runner.ResumeAll() c.Assert(err, IsNil) again := bson.NewObjectId() c.Logf("---- Running ops2 again under transaction %q, to fail for missing transaction", again.Hex()) err = s.runner.Run(ops2, again, nil) c.Assert(err, ErrorMatches, "cannot find transaction .*") c.Logf("---- Purging missing transactions") err = s.runner.PurgeMissing("accounts") c.Assert(err, IsNil) c.Logf("---- Resuming pending transactions") err = s.runner.ResumeAll() c.Assert(err, IsNil) expect := []struct{ Id, Balance int }{ {0, -1}, {1, 200}, {2, 100}, {3, 100}, } var got Account for _, want := range expect { err = s.accounts.FindId(want.Id).One(&got) if want.Balance == -1 { if err != mgo.ErrNotFound { c.Errorf("Account %d should not exist, find got err=%#v", err) } } else if err != nil { c.Errorf("Account %d should have balance of %d, but wasn't found", want.Id, want.Balance) } else if got.Balance != want.Balance { c.Errorf("Account %d should have balance of %d, got %d", want.Id, want.Balance, got.Balance) } } }