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package bolt
import (
"strconv"
"strings"
"testing"
"github.com/stretchr/testify/assert"
)
// Ensure a bucket can calculate stats.
func TestBucketStat(t *testing.T) {
withOpenDB(func(db *DB, path string) {
db.Do(func(txn *Transaction) error {
// Add bucket with lots of keys.
txn.CreateBucket("widgets")
b := txn.Bucket("widgets")
for i := 0; i < 100000; i++ {
b.Put([]byte(strconv.Itoa(i)), []byte(strconv.Itoa(i)))
}
// Add bucket with fewer keys but one big value.
txn.CreateBucket("woojits")
b = txn.Bucket("woojits")
for i := 0; i < 500; i++ {
b.Put([]byte(strconv.Itoa(i)), []byte(strconv.Itoa(i)))
}
b.Put([]byte("really-big-value"), []byte(strings.Repeat("*", 10000)))
// Add a bucket that fits on a single root leaf.
txn.CreateBucket("whozawhats")
b = txn.Bucket("whozawhats")
b.Put([]byte("foo"), []byte("bar"))
return nil
})
db.With(func(txn *Transaction) error {
b := txn.Bucket("widgets")
stat := b.Stat()
assert.Equal(t, stat.BranchPageCount, 15)
assert.Equal(t, stat.LeafPageCount, 1281)
assert.Equal(t, stat.OverflowPageCount, 0)
assert.Equal(t, stat.KeyCount, 100000)
assert.Equal(t, stat.MaxDepth, 3)
b = txn.Bucket("woojits")
stat = b.Stat()
assert.Equal(t, stat.BranchPageCount, 1)
assert.Equal(t, stat.LeafPageCount, 6)
assert.Equal(t, stat.OverflowPageCount, 2)
assert.Equal(t, stat.KeyCount, 501)
assert.Equal(t, stat.MaxDepth, 2)
b = txn.Bucket("whozawhats")
stat = b.Stat()
assert.Equal(t, stat.BranchPageCount, 0)
assert.Equal(t, stat.LeafPageCount, 1)
assert.Equal(t, stat.OverflowPageCount, 0)
assert.Equal(t, stat.KeyCount, 1)
assert.Equal(t, stat.MaxDepth, 1)
return nil
})
})
}
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