ceremonyclient/pebble/internal/manifest/level_metadata_test.go
Cassandra Heart 2e2a1e4789
v1.2.0 (#31)
2024-01-03 01:31:42 -06:00

145 lines
3.6 KiB
Go

// Copyright 2020 The LevelDB-Go and Pebble Authors. All rights reserved. Use
// of this source code is governed by a BSD-style license that can be found in
// the LICENSE file.
package manifest
import (
"bytes"
"fmt"
"strings"
"testing"
"github.com/cockroachdb/datadriven"
"github.com/cockroachdb/pebble/internal/base"
"github.com/stretchr/testify/require"
)
func TestLevelIterator(t *testing.T) {
var level LevelSlice
datadriven.RunTest(t, "testdata/level_iterator",
func(t *testing.T, d *datadriven.TestData) string {
switch d.Cmd {
case "define":
var files []*FileMetadata
var startReslice int
var endReslice int
for _, metaStr := range strings.Split(d.Input, " ") {
switch metaStr {
case "[":
startReslice = len(files)
continue
case "]":
endReslice = len(files)
continue
case " ", "":
continue
default:
parts := strings.Split(metaStr, "-")
if len(parts) != 2 {
t.Fatalf("malformed table spec: %q", metaStr)
}
m := &FileMetadata{FileNum: base.FileNum(len(files) + 1)}
m.ExtendPointKeyBounds(
base.DefaultComparer.Compare,
base.ParseInternalKey(strings.TrimSpace(parts[0])),
base.ParseInternalKey(strings.TrimSpace(parts[1])),
)
m.SmallestSeqNum = m.Smallest.SeqNum()
m.LargestSeqNum = m.Largest.SeqNum()
m.InitPhysicalBacking()
files = append(files, m)
}
}
level = NewLevelSliceKeySorted(base.DefaultComparer.Compare, files)
level = level.Reslice(func(start, end *LevelIterator) {
for i := 0; i < startReslice; i++ {
start.Next()
}
for i := len(files); i > endReslice; i-- {
end.Prev()
}
})
return ""
case "iter":
return runIterCmd(t, d, level.Iter(), false /* verbose */)
default:
return fmt.Sprintf("unknown command %q", d.Cmd)
}
})
}
func TestLevelIteratorFiltered(t *testing.T) {
var level LevelSlice
datadriven.RunTest(t, "testdata/level_iterator_filtered",
func(t *testing.T, d *datadriven.TestData) string {
switch d.Cmd {
case "define":
var files []*FileMetadata
for _, metaStr := range strings.Split(d.Input, "\n") {
m, err := ParseFileMetadataDebug(metaStr)
require.NoError(t, err)
files = append(files, m)
}
level = NewLevelSliceKeySorted(base.DefaultComparer.Compare, files)
return ""
case "iter":
var keyType string
d.ScanArgs(t, "key-type", &keyType)
iter := level.Iter()
switch keyType {
case "both":
// noop
case "points":
iter = iter.Filter(KeyTypePoint)
case "ranges":
iter = iter.Filter(KeyTypeRange)
}
return runIterCmd(t, d, iter, true /* verbose */)
default:
return fmt.Sprintf("unknown command %q", d.Cmd)
}
})
}
func runIterCmd(t *testing.T, d *datadriven.TestData, iter LevelIterator, verbose bool) string {
var buf bytes.Buffer
for _, line := range strings.Split(d.Input, "\n") {
parts := strings.Fields(line)
if len(parts) == 0 {
continue
}
var m *FileMetadata
switch parts[0] {
case "first":
m = iter.First()
case "last":
m = iter.Last()
case "next":
m = iter.Next()
case "prev":
m = iter.Prev()
case "seek-ge":
m = iter.SeekGE(base.DefaultComparer.Compare, []byte(parts[1]))
case "seek-lt":
m = iter.SeekLT(base.DefaultComparer.Compare, []byte(parts[1]))
default:
return fmt.Sprintf("unknown command %q", parts[0])
}
if m == nil {
fmt.Fprintln(&buf, ".")
} else {
if verbose {
fmt.Fprintln(&buf, m.DebugString(base.DefaultComparer.FormatKey, verbose))
} else {
fmt.Fprintln(&buf, m)
}
}
}
return buf.String()
}