package mempool import ( "crypto/rand" "crypto/sha256" "testing" "github.com/stretchr/testify/require" "github.com/tendermint/tendermint/abci/example/kvstore" abci "github.com/tendermint/tendermint/abci/types" "github.com/tendermint/tendermint/proxy" "github.com/tendermint/tendermint/types" ) func TestCacheRemove(t *testing.T) { cache := newMapTxCache(100) numTxs := 10 txs := make([][]byte, numTxs) for i := 0; i < numTxs; i++ { // probability of collision is 2**-256 txBytes := make([]byte, 32) rand.Read(txBytes) // nolint: gosec txs[i] = txBytes cache.Push(txBytes) // make sure its added to both the linked list and the map require.Equal(t, i+1, len(cache.map_)) require.Equal(t, i+1, cache.list.Len()) } for i := 0; i < numTxs; i++ { cache.Remove(txs[i]) // make sure its removed from both the map and the linked list require.Equal(t, numTxs-(i+1), len(cache.map_)) require.Equal(t, numTxs-(i+1), cache.list.Len()) } } func TestCacheAfterUpdate(t *testing.T) { app := kvstore.NewKVStoreApplication() cc := proxy.NewLocalClientCreator(app) mempool, cleanup := newMempoolWithApp(cc) defer cleanup() // reAddIndices & txsInCache can have elements > numTxsToCreate // also assumes max index is 255 for convenience // txs in cache also checks order of elements tests := []struct { numTxsToCreate int updateIndices []int reAddIndices []int txsInCache []int }{ {1, []int{}, []int{1}, []int{1, 0}}, // adding new txs works {2, []int{1}, []int{}, []int{1, 0}}, // update doesn't remove tx from cache {2, []int{2}, []int{}, []int{2, 1, 0}}, // update adds new tx to cache {2, []int{1}, []int{1}, []int{1, 0}}, // re-adding after update doesn't make dupe } for tcIndex, tc := range tests { for i := 0; i < tc.numTxsToCreate; i++ { tx := types.Tx{byte(i)} err := mempool.CheckTx(tx, nil, TxInfo{}) require.NoError(t, err) } updateTxs := []types.Tx{} for _, v := range tc.updateIndices { tx := types.Tx{byte(v)} updateTxs = append(updateTxs, tx) } mempool.Update(int64(tcIndex), updateTxs, abciResponses(len(updateTxs), abci.CodeTypeOK), nil, nil) for _, v := range tc.reAddIndices { tx := types.Tx{byte(v)} _ = mempool.CheckTx(tx, nil, TxInfo{}) } cache := mempool.cache.(*mapTxCache) node := cache.list.Front() counter := 0 for node != nil { require.NotEqual(t, len(tc.txsInCache), counter, "cache larger than expected on testcase %d", tcIndex) nodeVal := node.Value.([sha256.Size]byte) expectedBz := sha256.Sum256([]byte{byte(tc.txsInCache[len(tc.txsInCache)-counter-1])}) // Reference for reading the errors: // >>> sha256('\x00').hexdigest() // '6e340b9cffb37a989ca544e6bb780a2c78901d3fb33738768511a30617afa01d' // >>> sha256('\x01').hexdigest() // '4bf5122f344554c53bde2ebb8cd2b7e3d1600ad631c385a5d7cce23c7785459a' // >>> sha256('\x02').hexdigest() // 'dbc1b4c900ffe48d575b5da5c638040125f65db0fe3e24494b76ea986457d986' require.Equal(t, expectedBz, nodeVal, "Equality failed on index %d, tc %d", counter, tcIndex) counter++ node = node.Next() } require.Equal(t, len(tc.txsInCache), counter, "cache smaller than expected on testcase %d", tcIndex) mempool.Flush() } }