Golang TicketDB.RescanTicketDB方法代码示例

//.........这里部分代码省略.........
			// Make sure that the tickets that were supposed to be spent or
			// missed were.
			spentTix, err := tmdb.DumpSpentTickets(i)
			if err != nil {
				t.Errorf("DumpSpentTickets failure")
			}
			for _, h := range ticketsToSpendIn167 {
				if _, ok := spentTix[h]; !ok {
					t.Errorf("missing ticket %v that should have been missed "+
						"or spent in block %v", h, i)
				}
			}

			// Create snapshot of tmdb at block 168
			CopyOfMapsAtBlock168, err = cloneTicketDB(&tmdb)
			if err != nil {
				t.Errorf("db cloning at block 168 failure! %v", err)
			}
		}
	}

	// Remove five blocks from HEAD~1
	_, _, _, err = tmdb.RemoveBlockToHeight(50)
	if err != nil {
		t.Errorf("error: %v", err)
	}

	// Test if the roll back was symmetric to the earlier snapshot
	if !reflect.DeepEqual(tmdb.DumpMapsPointer(), CopyOfMapsAtBlock50) {
		t.Errorf("The td did not restore to a previous block height correctly!")
	}

	// Test rescanning a ticket db
	err = tmdb.RescanTicketDB()
	if err != nil {
		t.Errorf("rescanticketdb err: %v", err.Error())
	}

	// Test if the db file storage was symmetric to the earlier snapshot
	if !reflect.DeepEqual(tmdb.DumpMapsPointer(), CopyOfMapsAtBlock168) {
		t.Errorf("The td did not rescan to HEAD correctly!")
	}

	err = os.Mkdir("testdata/", os.FileMode(0700))
	if err != nil {
		t.Error(err)
	}

	// Store the ticket db to disk
	err = tmdb.Store("testdata/", "testtmdb")
	if err != nil {
		t.Errorf("error: %v", err)
	}

	var tmdb2 stake.TicketDB
	err = tmdb2.LoadTicketDBs("testdata/", "testtmdb", simNetParams, database)
	if err != nil {
		t.Errorf("error: %v", err)
	}

	// Test if the db file storage was symmetric to previously rescanned one
	if !reflect.DeepEqual(tmdb.DumpMapsPointer(), tmdb2.DumpMapsPointer()) {
		t.Errorf("The td did not rescan to a previous block height correctly!")
	}

	tmdb2.Close()

// chainSetup is used to create a new db and chain instance with the genesis
// block already inserted.  In addition to the new chain instnce, it returns
// a teardown function the caller should invoke when done testing to clean up.
func chainSetup(dbName string, params *chaincfg.Params) (*blockchain.BlockChain, func(), error) {
	if !isSupportedDbType(testDbType) {
		return nil, nil, fmt.Errorf("unsupported db type %v", testDbType)
	}

	// Handle memory database specially since it doesn't need the disk
	// specific handling.
	var db database.Db
	tmdb := new(stake.TicketDB)

	var teardown func()
	if testDbType == "memdb" {
		ndb, err := database.CreateDB(testDbType)
		if err != nil {
			return nil, nil, fmt.Errorf("error creating db: %v", err)
		}
		db = ndb

		// Setup a teardown function for cleaning up.  This function is
		// returned to the caller to be invoked when it is done testing.
		teardown = func() {
			tmdb.Close()
			db.Close()
		}
	} else {
		// Create the root directory for test databases.
		if !fileExists(testDbRoot) {
			if err := os.MkdirAll(testDbRoot, 0700); err != nil {
				err := fmt.Errorf("unable to create test db "+
					"root: %v", err)
				return nil, nil, err
			}
		}

		// Create a new database to store the accepted blocks into.
		dbPath := filepath.Join(testDbRoot, dbName)
		_ = os.RemoveAll(dbPath)
		ndb, err := database.CreateDB(testDbType, dbPath)
		if err != nil {
			return nil, nil, fmt.Errorf("error creating db: %v", err)
		}
		db = ndb

		// Setup a teardown function for cleaning up.  This function is
		// returned to the caller to be invoked when it is done testing.
		teardown = func() {
			dbVersionPath := filepath.Join(testDbRoot, dbName+".ver")
			tmdb.Close()
			db.Sync()
			db.Close()
			os.RemoveAll(dbPath)
			os.Remove(dbVersionPath)
			os.RemoveAll(testDbRoot)
		}
	}

	// Insert the main network genesis block.  This is part of the initial
	// database setup.
	genesisBlock := dcrutil.NewBlock(params.GenesisBlock)
	genesisBlock.SetHeight(int64(0))
	_, err := db.InsertBlock(genesisBlock)
	if err != nil {
		teardown()
		err := fmt.Errorf("failed to insert genesis block: %v", err)
		return nil, nil, err
	}

	// Start the ticket database.
	tmdb.Initialize(params, db)
	tmdb.RescanTicketDB()

	chain := blockchain.New(db, tmdb, params, nil)
	return chain, teardown, nil
}