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  1. package blockchain
  2. import (
  3. "math/rand"
  4. "testing"
  5. "time"
  6. . "github.com/tendermint/tendermint/common"
  7. "github.com/tendermint/tendermint/types"
  8. )
  9. type testPeer struct {
  10. id string
  11. height int
  12. }
  13. func makePeers(numPeers int, minHeight, maxHeight int) map[string]testPeer {
  14. peers := make(map[string]testPeer, numPeers)
  15. for i := 0; i < numPeers; i++ {
  16. peerID := RandStr(12)
  17. height := minHeight + rand.Intn(maxHeight-minHeight)
  18. peers[peerID] = testPeer{peerID, height}
  19. }
  20. return peers
  21. }
  22. func TestBasic(t *testing.T) {
  23. start := 42
  24. peers := makePeers(10, start+1, 1000)
  25. timeoutsCh := make(chan string, 100)
  26. requestsCh := make(chan BlockRequest, 100)
  27. pool := NewBlockPool(start, requestsCh, timeoutsCh)
  28. pool.Start()
  29. // Introduce each peer.
  30. go func() {
  31. for _, peer := range peers {
  32. pool.SetPeerHeight(peer.id, peer.height)
  33. }
  34. }()
  35. // Start a goroutine to pull blocks
  36. go func() {
  37. for {
  38. if !pool.IsRunning() {
  39. return
  40. }
  41. first, second := pool.PeekTwoBlocks()
  42. if first != nil && second != nil {
  43. pool.PopRequest()
  44. } else {
  45. time.Sleep(1 * time.Second)
  46. }
  47. }
  48. }()
  49. // Pull from channels
  50. for {
  51. select {
  52. case peerID := <-timeoutsCh:
  53. t.Errorf("timeout: %v", peerID)
  54. case request := <-requestsCh:
  55. log.Info("TEST: Pulled new BlockRequest", "request", request)
  56. if request.Height == 300 {
  57. return // Done!
  58. }
  59. // Request desired, pretend like we got the block immediately.
  60. go func() {
  61. block := &types.Block{Header: &types.Header{Height: request.Height}}
  62. pool.AddBlock(request.PeerID, block, 123)
  63. log.Info("TEST: Added block", "block", request.Height, "peer", request.PeerID)
  64. }()
  65. }
  66. }
  67. pool.Stop()
  68. }
  69. func TestTimeout(t *testing.T) {
  70. start := 42
  71. peers := makePeers(10, start+1, 1000)
  72. timeoutsCh := make(chan string, 100)
  73. requestsCh := make(chan BlockRequest, 100)
  74. pool := NewBlockPool(start, requestsCh, timeoutsCh)
  75. pool.Start()
  76. for _, peer := range peers {
  77. log.Info("Peer", "id", peer.id)
  78. }
  79. // Introduce each peer.
  80. go func() {
  81. for _, peer := range peers {
  82. pool.SetPeerHeight(peer.id, peer.height)
  83. }
  84. }()
  85. // Start a goroutine to pull blocks
  86. go func() {
  87. for {
  88. if !pool.IsRunning() {
  89. return
  90. }
  91. first, second := pool.PeekTwoBlocks()
  92. if first != nil && second != nil {
  93. pool.PopRequest()
  94. } else {
  95. time.Sleep(1 * time.Second)
  96. }
  97. }
  98. }()
  99. // Pull from channels
  100. counter := 0
  101. timedOut := map[string]struct{}{}
  102. for {
  103. select {
  104. case peerID := <-timeoutsCh:
  105. log.Info("Timeout", "peerID", peerID)
  106. if _, ok := timedOut[peerID]; !ok {
  107. counter++
  108. if counter == len(peers) {
  109. return // Done!
  110. }
  111. }
  112. case request := <-requestsCh:
  113. log.Info("TEST: Pulled new BlockRequest", "request", request)
  114. }
  115. }
  116. pool.Stop()
  117. }