seaweedfs/weed/storage/idx_binary_search_test.go

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package storage
import (
"github.com/seaweedfs/seaweedfs/weed/storage/idx"
"github.com/seaweedfs/seaweedfs/weed/storage/needle"
"github.com/seaweedfs/seaweedfs/weed/storage/super_block"
"github.com/seaweedfs/seaweedfs/weed/storage/types"
"github.com/stretchr/testify/assert"
"os"
"testing"
)
func TestFirstInvalidIndex(t *testing.T) {
dir := t.TempDir()
v, err := NewVolume(dir, dir, "", 1, NeedleMapInMemory, &super_block.ReplicaPlacement{}, &needle.TTL{}, 0, 0)
if err != nil {
t.Fatalf("volume creation: %v", err)
}
type WriteInfo struct {
offset int64
size int32
}
// initialize 20 needles then update first 10 needles
for i := 1; i <= 30; i++ {
n := newRandomNeedle(uint64(i))
n.Flags = 0x08
_, _, _, err := v.writeNeedle2(n, true, false)
if err != nil {
t.Fatalf("write needle %d: %v", i, err)
}
}
b, err := os.ReadFile(v.IndexFileName() + ".idx")
// base case every record is valid -> nothing is filtered
index, err := idx.FirstInvalidIndex(b, func(key types.NeedleId, offset types.Offset, size types.Size) (bool, error) {
return true, nil
})
if err != nil {
t.Fatalf("failed to complete binary search %v", err)
}
assert.Equal(t, 30, index, "when every record is valid nothing should be filtered from binary search")
index, err = idx.FirstInvalidIndex(b, func(key types.NeedleId, offset types.Offset, size types.Size) (bool, error) {
return false, nil
})
assert.Equal(t, 0, index, "when every record is invalid everything should be filtered from binary search")
index, err = idx.FirstInvalidIndex(b, func(key types.NeedleId, offset types.Offset, size types.Size) (bool, error) {
return key < 20, nil
})
// needle key range from 1 to 30 so < 20 means 19 keys are valid and cutoff the bytes at 19 * 16 = 304
assert.Equal(t, 19, index, "when every record is invalid everything should be filtered from binary search")
index, err = idx.FirstInvalidIndex(b, func(key types.NeedleId, offset types.Offset, size types.Size) (bool, error) {
return key <= 1, nil
})
// needle key range from 1 to 30 so <=1 1 means 1 key is valid and cutoff the bytes at 1 * 16 = 16
assert.Equal(t, 1, index, "when every record is invalid everything should be filtered from binary search")
}