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sstable_test.go
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sstable_test.go
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package sst
import (
"fmt"
"github.com/spirit-labs/tektite/asl/encoding"
"github.com/spirit-labs/tektite/common"
iteration2 "github.com/spirit-labs/tektite/iteration"
"github.com/stretchr/testify/require"
"math"
"testing"
"time"
)
func TestBuildTable(t *testing.T) {
commonPrefix := []byte("keyprefix/")
numEntries := 1000
iter := prepareInput(commonPrefix, []byte("valueprefix/"), numEntries)
// Add some deletes too
numDeletes := 1000
for i := 0; i < numDeletes; i++ {
key := fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), numEntries+i)
iter.AddKV([]byte(key), nil)
}
now := uint64(time.Now().UTC().UnixMilli())
sstable, smallestKey, largestKey, _, _, err := BuildSSTable(common.DataFormatV1, 0, 0, iter)
require.NoError(t, err)
require.Equal(t, common.DataFormatV1, sstable.format)
require.Equal(t, numEntries+numDeletes, int(sstable.numEntries))
require.Equal(t, numDeletes, int(sstable.numDeletes))
expectedSmallestKey := []byte(fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), 0))
expectedLargestKey := []byte(fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), numEntries+numDeletes-1))
require.Equal(t, expectedSmallestKey, smallestKey)
require.Equal(t, expectedLargestKey, largestKey)
require.GreaterOrEqual(t, sstable.CreationTime(), now)
}
func TestBuildWithTombstones(t *testing.T) {
gi := &iteration2.StaticIterator{}
gi.AddKV([]byte("keyPrefix/key0"), nil)
gi.AddKV([]byte("keyPrefix/key1"), []byte("val1"))
gi.AddKV([]byte("keyPrefix/key2"), []byte("val2"))
gi.AddKV([]byte("keyPrefix/key3"), nil)
sstable, _, _, _, _, err := BuildSSTable(common.DataFormatV1, 0, 0, gi)
require.NoError(t, err)
iter, err := sstable.NewIterator([]byte("keyPrefix/"), nil)
require.NoError(t, err)
valid, curr, err := iter.Next()
require.NoError(t, err)
require.Equal(t, true, valid)
require.Equal(t, "keyPrefix/key0", string(curr.Key))
require.Nil(t, curr.Value)
valid, curr, err = iter.Next()
require.NoError(t, err)
require.Equal(t, true, valid)
require.Equal(t, "keyPrefix/key1", string(curr.Key))
require.Equal(t, "val1", string(curr.Value))
valid, curr, err = iter.Next()
require.NoError(t, err)
require.Equal(t, true, valid)
require.Equal(t, "keyPrefix/key2", string(curr.Key))
require.Equal(t, "val2", string(curr.Value))
valid, curr, err = iter.Next()
require.NoError(t, err)
require.Equal(t, true, valid)
require.Equal(t, "keyPrefix/key3", string(curr.Key))
require.Nil(t, curr.Value)
requireIterNextValid(t, iter, false)
}
func TestBuildWithPrefixTombstones(t *testing.T) {
gi := &iteration2.StaticIterator{}
gi.AddKV(encoding.EncodeVersion([]byte("................prefix1_"), 0), nil)
gi.AddKV(encoding.EncodeVersion([]byte("................prefix2_"), 0), nil)
sstable, _, _, _, _, err := BuildSSTable(common.DataFormatV1, 0, 0, gi)
require.NoError(t, err)
require.Equal(t, 2, sstable.NumPrefixDeletes())
}
func TestSeek(t *testing.T) {
commonPrefix := []byte("keyprefix/")
numEntries := 1000
iter := prepareInput(commonPrefix, []byte("valueprefix/"), numEntries)
// Add a few more entries so we can test seeking to next
key := fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), 1500)
value := fmt.Sprintf("%ssomevalue-%010d", "valueprefix/", 1500)
iter.AddKVAsString(key, value)
key = fmt.Sprintf("%ssomekey-%010d1234", string(commonPrefix), 1550)
value = fmt.Sprintf("%ssomevalue-%010d1234", "valueprefix/", 1550)
iter.AddKVAsString(key, value)
key = fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), 1600)
value = fmt.Sprintf("%ssomevalue-%010d", "valueprefix/", 1600)
iter.AddKVAsString(key, value)
sstable, _, _, _, _, err := BuildSSTable(common.DataFormatV1, 0, 0, iter)
require.NoError(t, err)
// Seek all the keys - exact match
for i := 0; i < numEntries; i++ {
k := []byte(fmt.Sprintf("keyprefix/somekey-%010d", i))
v := []byte(fmt.Sprintf("valueprefix/somevalue-%010d", i))
seek(t, k, k, v, true, sstable)
}
//boundary cases
seek(t, []byte("keyprefix/somekey-0000000000"), []byte("keyprefix/somekey-0000000000"), []byte("valueprefix/somevalue-0000000000"), true, sstable)
k := []byte(fmt.Sprintf("keyprefix/somekey-%010d", numEntries-1))
v := []byte(fmt.Sprintf("valueprefix/somevalue-%010d", numEntries-1))
seek(t, k, k, v, true, sstable)
//not found - as keys all greater than keys in sstable
seek(t, []byte("keyprefix/t"), nil, nil, false, sstable)
seek(t, []byte("keyprefix/somekey-0000002000"), nil, nil, false, sstable)
seek(t, []byte("keyprefix/uqwdiquwhdiuqwhdiuqhwdiuqhwdiuhqwd"), nil, nil, false, sstable)
//should find next key greater than
seek(t, nil, []byte("keyprefix/somekey-0000000000"), []byte("valueprefix/somevalue-0000000000"), true, sstable)
seek(t, []byte("a"), []byte("keyprefix/somekey-0000000000"), []byte("valueprefix/somevalue-0000000000"), true, sstable)
seek(t, []byte("aaaaaaaaa/"), []byte("keyprefix/somekey-0000000000"), []byte("valueprefix/somevalue-0000000000"), true, sstable)
seek(t, []byte("keyprefix/"), []byte("keyprefix/somekey-0000000000"), []byte("valueprefix/somevalue-0000000000"), true, sstable)
seek(t, []byte("keyprefix/r"), []byte("keyprefix/somekey-0000000000"), []byte("valueprefix/somevalue-0000000000"), true, sstable)
seek(t, []byte("keyprefix/somekey"), []byte("keyprefix/somekey-0000000000"), []byte("valueprefix/somevalue-0000000000"), true, sstable)
seek(t, []byte("keyprefix/somekey-00000005001"), []byte("keyprefix/somekey-0000000501"), []byte("valueprefix/somevalue-0000000501"), true, sstable)
seek(t, []byte("keyprefix/somekey-0000001450"), []byte("keyprefix/somekey-0000001500"), []byte("valueprefix/somevalue-0000001500"), true, sstable)
seek(t, []byte("keyprefix/somekey-0000001450999"), []byte("keyprefix/somekey-0000001500"), []byte("valueprefix/somevalue-0000001500"), true, sstable)
seek(t, []byte("keyprefix/somekey-0000001549"), []byte("keyprefix/somekey-00000015501234"), []byte("valueprefix/somevalue-00000015501234"), true, sstable)
seek(t, []byte("keyprefix/somekey-000000154999"), []byte("keyprefix/somekey-00000015501234"), []byte("valueprefix/somevalue-00000015501234"), true, sstable)
seek(t, []byte("keyprefix/somekey-0000001550"), []byte("keyprefix/somekey-00000015501234"), []byte("valueprefix/somevalue-00000015501234"), true, sstable)
seek(t, []byte("keyprefix/somekey-0000001599"), []byte("keyprefix/somekey-0000001600"), []byte("valueprefix/somevalue-0000001600"), true, sstable)
seek(t, []byte("keyprefix/somekey-000000159999"), []byte("keyprefix/somekey-0000001600"), []byte("valueprefix/somevalue-0000001600"), true, sstable)
seek(t, []byte("keyprefix/somekey-0000001600"), []byte("keyprefix/somekey-0000001600"), []byte("valueprefix/somevalue-0000001600"), true, sstable)
}
func seek(t *testing.T, seekKey []byte, expectedKey []byte, expectedValue []byte, expectedValid bool, sstable *SSTable) {
t.Helper()
iter, err := sstable.NewIterator(seekKey, nil)
require.NoError(t, err)
kv := requireIterNextValid(t, iter, expectedValid)
if !expectedValid {
return
}
require.Equal(t, string(expectedKey), string(kv.Key))
require.Equal(t, string(expectedValue), string(kv.Value))
}
func TestIterateWithGaps(t *testing.T) {
commonPrefix := []byte("keyprefix/")
it := &iteration2.StaticIterator{}
// Add a few more entries so we can test seeking to next
key := fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), 1500)
value := fmt.Sprintf("%ssomevalue-%010d", "valueprefix/", 1500)
it.AddKVAsString(key, value)
key = fmt.Sprintf("%ssomekey-%010d1234", string(commonPrefix), 1550)
value = fmt.Sprintf("%ssomevalue-%010d1234", "valueprefix/", 1550)
it.AddKVAsString(key, value)
key = fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), 1600)
value = fmt.Sprintf("%ssomevalue-%010d", "valueprefix/", 1600)
it.AddKVAsString(key, value)
sstable, _, _, _, _, err := BuildSSTable(common.DataFormatV1, 0, 0, it)
require.NoError(t, err)
iter, err := sstable.NewIterator([]byte("keyprefix/somekey-0000001501"), nil)
require.NoError(t, err)
kv := requireIterNextValid(t, iter, true)
require.Equal(t, []byte("keyprefix/somekey-00000015501234"), kv.Key)
require.Equal(t, []byte("valueprefix/somevalue-00000015501234"), kv.Value)
kv = requireIterNextValid(t, iter, true)
require.Equal(t, []byte("keyprefix/somekey-0000001600"), kv.Key)
require.Equal(t, []byte("valueprefix/somevalue-0000001600"), kv.Value)
requireIterNextValid(t, iter, false)
}
func TestIterate(t *testing.T) {
commonPrefix := []byte("keyprefix/")
testIterate(t, commonPrefix, nil, 0, 999)
testIterate(t, commonPrefix, []byte("keyprefix/somekey-0000000450"), 0, 449)
testIterate(t, []byte("keyprefix/somekey-0000000300"), nil, 300, 999)
testIterate(t, []byte("keyprefix/somekey-0000000300999"), nil, 301, 999)
testIterate(t, []byte("keyprefix/somekey-0000000300"), []byte("keyprefix/somekey-0000000900"), 300, 899)
testIterate(t, []byte("keyprefix/somekey-0000000300"), []byte("keyprefix/somekey-0000000999"), 300, 998)
testIterate(t, []byte("keyprefix/somekey-0000000300"), []byte("keyprefix/somekey-0000000999999"), 300, 999)
testIterate(t, []byte("keyprefix/somekey-0000000300"), []byte("keyprefix/somekey-0000001000"), 300, 999)
testIterate(t, []byte("keyprefix/somekey-0000000700"), []byte("keyprefix/somekey-0000000701"), 700, 700)
testIterate(t, []byte("keyprefix/somekey-0000000700"), []byte("keyprefix/somekey-0000000700"), -1, -1)
testIterate(t, []byte("keyprefix/somekey-0000001000"), []byte("keyprefix/somekey-0000001001"), -1, -1)
testIterate(t, []byte("keyprefix/t"), []byte("keyprefix/u"), -1, -1)
}
func TestCurrentIterateAll(t *testing.T) {
it := prepareInput(nil, nil, 10)
sstable, _, _, _, _, err := BuildSSTable(common.DataFormatV1, 0, 0, it)
require.NoError(t, err)
iter, err := sstable.NewIterator(nil, nil)
require.NoError(t, err)
for i := 0; i < 10; i++ {
kv := requireIterNextValid(t, iter, true)
require.Equal(t, kv, iter.Current())
}
kv := requireIterNextValid(t, iter, false)
require.Equal(t, common.KV{}, kv)
require.Equal(t, common.KV{}, iter.Current())
}
func TestCurrentIteratePartial(t *testing.T) {
it := prepareInput(nil, nil, 10)
sstable, _, _, _, _, err := BuildSSTable(common.DataFormatV1, 0, 0, it)
require.NoError(t, err)
startRange := []byte(fmt.Sprintf("somekey-%010d", 2))
endRange := []byte(fmt.Sprintf("somekey-%010d", 7))
iter, err := sstable.NewIterator(startRange, endRange)
require.NoError(t, err)
for i := 2; i < 7; i++ {
kv := requireIterNextValid(t, iter, true)
require.Equal(t, kv, iter.Current())
}
kv := requireIterNextValid(t, iter, false)
require.Equal(t, common.KV{}, kv)
require.Equal(t, common.KV{}, iter.Current())
}
func testIterate(t *testing.T, startKey []byte, endKey []byte, firstExpected int, lastExpected int) {
t.Helper()
commonPrefix := []byte("keyprefix/")
numEntries := 1000
it := prepareInput(commonPrefix, []byte("valueprefix/"), numEntries)
sstable, _, _, _, _, err := BuildSSTable(common.DataFormatV1, 0, 0, it)
require.NoError(t, err)
iter, err := sstable.NewIterator(startKey, endKey)
require.NoError(t, err)
if firstExpected == -1 {
requireIterNextValid(t, iter, false)
return
}
i := firstExpected
for i <= lastExpected {
valid, kv, err := iter.Next()
require.NoError(t, err)
if !valid {
break
}
k := []byte(fmt.Sprintf("keyprefix/somekey-%010d", i))
v := []byte(fmt.Sprintf("valueprefix/somevalue-%010d", i))
require.Equal(t, k, kv.Key)
require.Equal(t, v, kv.Value)
i++
}
requireIterNextValid(t, iter, false)
}
func TestSerializeDeserialize(t *testing.T) {
commonPrefix := []byte("................prefix1_")
numEntries := 1000
gi := &iteration2.StaticIterator{}
// add a prefix deletion
gi.AddKV(encoding.EncodeVersion(commonPrefix, math.MaxUint64), nil)
// add some entries
for i := 0; i < numEntries; i++ {
key := fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), i)
value := fmt.Sprintf("%ssomevalue-%010d", string(commonPrefix), i)
gi.AddKV(encoding.EncodeVersion([]byte(key), 0), []byte(value))
}
// add some deletes too
key1 := fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), numEntries)
gi.AddKV(encoding.EncodeVersion([]byte(key1), 0), nil)
key2 := fmt.Sprintf("%ssomekey-%010d", string(commonPrefix), numEntries+1)
gi.AddKV(encoding.EncodeVersion([]byte(key2), 0), nil)
sstable, _, _, _, _, err := BuildSSTable(common.DataFormatV1, 0, 0, gi)
require.NoError(t, err)
require.Equal(t, 1, int(sstable.numPrefixDeletes))
buff := sstable.Serialize()
sstable2 := &SSTable{}
sstable2.Deserialize(buff, 0)
require.Equal(t, sstable.format, sstable2.format)
require.Equal(t, sstable.indexOffset, sstable2.indexOffset)
require.Equal(t, sstable.numEntries, sstable2.numEntries)
require.Equal(t, sstable.numDeletes, sstable2.numDeletes)
require.Equal(t, sstable.maxKeyLength, sstable2.maxKeyLength)
require.Equal(t, sstable.data, sstable2.data)
require.Equal(t, sstable.creationTime, sstable2.creationTime)
require.Equal(t, sstable.numPrefixDeletes, sstable2.numPrefixDeletes)
}
func prepareInput(keyPrefix []byte, valuePrefix []byte, numEntries int) *iteration2.StaticIterator {
gi := &iteration2.StaticIterator{}
for i := 0; i < numEntries; i++ {
key := fmt.Sprintf("%ssomekey-%010d", string(keyPrefix), i)
value := fmt.Sprintf("%ssomevalue-%010d", string(valuePrefix), i)
gi.AddKVAsString(key, value)
}
return gi
}
func requireIterNextValid(t require.TestingT, iter iteration2.Iterator, valid bool) common.KV {
v, kv, err := iter.Next()
require.NoError(t, err)
require.Equal(t, valid, v)
return kv
}