// TestReorganization loads a set of test blocks which force a chain
// reorganization to test the block chain handling code.
// The test blocks were originally from a post on the bitcoin talk forums:
// https://bitcointalk.org/index.php?topic=46370.msg577556#msg577556
func TestReorganization(t *testing.T) {
// Intentionally load the side chain blocks out of order to ensure
// orphans are handled properly along with chain reorganization.
testFiles := []string{
"blk_0_to_4.dat.bz2",
"blk_4A.dat.bz2",
"blk_5A.dat.bz2",
"blk_3A.dat.bz2",
}
var blocks []*btcutil.Block
for _, file := range testFiles {
blockTmp, err := loadBlocks(file)
if err != nil {
t.Errorf("Error loading file: %v\n", err)
}
for _, block := range blockTmp {
blocks = append(blocks, block)
}
}
t.Logf("Number of blocks: %v\n", len(blocks))
// Create a new database and chain instance to run tests against.
chain, teardownFunc, err := chainSetup("reorg")
if err != nil {
t.Errorf("Failed to setup chain instance: %v", err)
return
}
defer teardownFunc()
// Since we're not dealing with the real block chain, disable
// checkpoints and set the coinbase maturity to 1.
chain.DisableCheckpoints(true)
blockchain.TstSetCoinbaseMaturity(1)
timeSource := blockchain.NewMedianTime()
expectedOrphans := map[int]struct{}{5: struct{}{}, 6: struct{}{}}
for i := 1; i < len(blocks); i++ {
isOrphan, err := chain.ProcessBlock(blocks[i], timeSource, blockchain.BFNone)
if err != nil {
t.Errorf("ProcessBlock fail on block %v: %v\n", i, err)
return
}
if _, ok := expectedOrphans[i]; !ok && isOrphan {
t.Errorf("ProcessBlock incorrectly returned block %v "+
"is an orphan\n", i)
}
}
return
}
// TestHaveBlock tests the HaveBlock API to ensure proper functionality.
func TestHaveBlock(t *testing.T) {
// Load up blocks such that there is a side chain.
// (genesis block) -> 1 -> 2 -> 3 -> 4
// \-> 3a
testFiles := []string{
"blk_0_to_4.dat.bz2",
"blk_3A.dat.bz2",
}
var blocks []*btcutil.Block
for _, file := range testFiles {
blockTmp, err := loadBlocks(file)
if err != nil {
t.Errorf("Error loading file: %v\n", err)
return
}
for _, block := range blockTmp {
blocks = append(blocks, block)
}
}
// Create a new database and chain instance to run tests against.
chain, teardownFunc, err := chainSetup("haveblock")
if err != nil {
t.Errorf("Failed to setup chain instance: %v", err)
return
}
defer teardownFunc()
// Since we're not dealing with the real block chain, disable
// checkpoints and set the coinbase maturity to 1.
chain.DisableCheckpoints(true)
blockchain.TstSetCoinbaseMaturity(1)
timeSource := blockchain.NewMedianTime()
for i := 1; i < len(blocks); i++ {
isOrphan, err := chain.ProcessBlock(blocks[i], timeSource,
blockchain.BFNone)
if err != nil {
t.Errorf("ProcessBlock fail on block %v: %v\n", i, err)
return
}
if isOrphan {
t.Errorf("ProcessBlock incorrectly returned block %v "+
"is an orphan\n", i)
return
}
}
// Insert an orphan block.
isOrphan, err := chain.ProcessBlock(btcutil.NewBlock(&Block100000),
timeSource, blockchain.BFNone)
if err != nil {
t.Errorf("Unable to process block: %v", err)
return
}
if !isOrphan {
t.Errorf("ProcessBlock indicated block is an not orphan when " +
"it should be\n")
return
}
tests := []struct {
hash string
want bool
}{
// Genesis block should be present (in the main chain).
{hash: btcnet.MainNetParams.GenesisHash.String(), want: true},
// Block 3a should be present (on a side chain).
{hash: "00000000474284d20067a4d33f6a02284e6ef70764a3a26d6a5b9df52ef663dd", want: true},
// Block 100000 should be present (as an orphan).
{hash: "000000000003ba27aa200b1cecaad478d2b00432346c3f1f3986da1afd33e506", want: true},
// Random hashes should not be availble.
{hash: "123", want: false},
}
for i, test := range tests {
hash, err := btcwire.NewShaHashFromStr(test.hash)
if err != nil {
t.Errorf("NewShaHashFromStr: %v", err)
continue
}
result, err := chain.HaveBlock(hash)
if err != nil {
t.Errorf("HaveBlock #%d unexpected error: %v", i, err)
return
}
if result != test.want {
t.Errorf("HaveBlock #%d got %v want %v", i, result,
test.want)
continue
}
}
}