ipld-eth-server/libraries/shared/fetcher/csv_tail_storage_fetcher_test.go

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2019-04-26 15:42:40 +00:00
// VulcanizeDB
// Copyright © 2019 Vulcanize
// This program is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as published by
// the Free Software Foundation, either version 3 of the License, or
// (at your option) any later version.
// This program is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
// GNU Affero General Public License for more details.
// You should have received a copy of the GNU Affero General Public License
// along with this program. If not, see <http://www.gnu.org/licenses/>.
package fetcher_test
import (
"fmt"
"strings"
"time"
"github.com/ethereum/go-ethereum/common"
"github.com/hpcloud/tail"
. "github.com/onsi/ginkgo"
. "github.com/onsi/gomega"
"github.com/vulcanize/vulcanizedb/libraries/shared/fetcher"
"github.com/vulcanize/vulcanizedb/libraries/shared/storage/utils"
"github.com/vulcanize/vulcanizedb/pkg/fakes"
)
var _ = Describe("Csv Tail Storage Fetcher", func() {
var (
errorsChannel chan error
mockTailer *fakes.MockTailer
rowsChannel chan utils.StorageDiffRow
storageFetcher fetcher.CsvTailStorageFetcher
)
BeforeEach(func() {
errorsChannel = make(chan error)
rowsChannel = make(chan utils.StorageDiffRow)
mockTailer = fakes.NewMockTailer()
storageFetcher = fetcher.NewCsvTailStorageFetcher(mockTailer)
})
It("adds error to errors channel if tailing file fails", func(done Done) {
mockTailer.TailErr = fakes.FakeError
go storageFetcher.FetchStorageDiffs(rowsChannel, errorsChannel)
Expect(<-errorsChannel).To(MatchError(fakes.FakeError))
close(done)
})
It("adds parsed csv row to rows channel for storage diff", func(done Done) {
line := getFakeLine()
go storageFetcher.FetchStorageDiffs(rowsChannel, errorsChannel)
mockTailer.Lines <- line
expectedRow, err := utils.FromStrings(strings.Split(line.Text, ","))
Expect(err).NotTo(HaveOccurred())
Expect(<-rowsChannel).To(Equal(expectedRow))
close(done)
})
It("adds error to errors channel if parsing csv fails", func(done Done) {
line := &tail.Line{Text: "invalid"}
go storageFetcher.FetchStorageDiffs(rowsChannel, errorsChannel)
mockTailer.Lines <- line
Expect(<-errorsChannel).To(HaveOccurred())
select {
case <-rowsChannel:
Fail("value passed to rows channel on error")
default:
Succeed()
}
close(done)
})
})
func getFakeLine() *tail.Line {
address := common.HexToAddress("0x1234567890abcdef")
blockHash := []byte{4, 5, 6}
blockHeight := int64(789)
storageKey := []byte{9, 8, 7}
storageValue := []byte{6, 5, 4}
return &tail.Line{
Text: fmt.Sprintf("%s,%s,%d,%s,%s", common.Bytes2Hex(address.Bytes()), common.Bytes2Hex(blockHash),
blockHeight, common.Bytes2Hex(storageKey), common.Bytes2Hex(storageValue)),
Time: time.Time{},
Err: nil,
}
}