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package bolt
import (
"errors"
"fmt"
"math/rand"
"os"
"strconv"
"strings"
"testing"
"github.com/boltdb/bolt/bench"
"github.com/stretchr/testify/assert"
)
// Ensure that committing a closed transaction returns an error.
func TestTx_Commit_Closed(t *testing.T) {
withOpenDB(func(db *DB, path string) {
tx, _ := db.Begin(true)
tx.CreateBucket([]byte("foo"))
assert.NoError(t, tx.Commit())
assert.Equal(t, tx.Commit(), ErrTxClosed)
})
}
// Ensure that rolling back a closed transaction returns an error.
func TestTx_Rollback_Closed(t *testing.T) {
withOpenDB(func(db *DB, path string) {
tx, _ := db.Begin(true)
assert.NoError(t, tx.Rollback())
assert.Equal(t, tx.Rollback(), ErrTxClosed)
})
}
// Ensure that committing a read-only transaction returns an error.
func TestTx_Commit_ReadOnly(t *testing.T) {
withOpenDB(func(db *DB, path string) {
tx, _ := db.Begin(false)
assert.Equal(t, tx.Commit(), ErrTxNotWritable)
})
}
// Ensure that creating a bucket with a read-only transaction returns an error.
func TestTx_CreateBucket_ReadOnly(t *testing.T) {
withOpenDB(func(db *DB, path string) {
db.View(func(tx *Tx) error {
b, err := tx.CreateBucket([]byte("foo"))
assert.Nil(t, b)
assert.Equal(t, ErrTxNotWritable, err)
return nil
})
})
}
// Ensure that creating a bucket on a closed transaction returns an error.
func TestTx_CreateBucket_Closed(t *testing.T) {
withOpenDB(func(db *DB, path string) {
tx, _ := db.Begin(true)
tx.Commit()
b, err := tx.CreateBucket([]byte("foo"))
assert.Nil(t, b)
assert.Equal(t, ErrTxClosed, err)
})
}
// Ensure that a Tx can retrieve a bucket.
func TestTx_Bucket(t *testing.T) {
withOpenDB(func(db *DB, path string) {
db.Update(func(tx *Tx) error {
tx.CreateBucket([]byte("widgets"))
b := tx.Bucket([]byte("widgets"))
assert.NotNil(t, b)
return nil
})
})
}
// Ensure that a Tx retrieving a non-existent key returns nil.
func TestTx_Get_Missing(t *testing.T) {
withOpenDB(func(db *DB, path string) {
db.Update(func(tx *Tx) error {
tx.CreateBucket([]byte("widgets"))
tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
value := tx.Bucket([]byte("widgets")).Get([]byte("no_such_key"))
assert.Nil(t, value)
return nil
})
})
}
// Ensure that a bucket can be created and retrieved.
func TestTx_CreateBucket(t *testing.T) {
withOpenDB(func(db *DB, path string) {
// Create a bucket.
db.Update(func(tx *Tx) error {
b, err := tx.CreateBucket([]byte("widgets"))
assert.NotNil(t, b)
assert.NoError(t, err)
return nil
})
// Read the bucket through a separate transaction.
db.View(func(tx *Tx) error {
b := tx.Bucket([]byte("widgets"))
assert.NotNil(t, b)
return nil
})
})
}
// Ensure that a bucket can be created if it doesn't already exist.
func TestTx_CreateBucketIfNotExists(t *testing.T) {
withOpenDB(func(db *DB, path string) {
db.Update(func(tx *Tx) error {
b, err := tx.CreateBucketIfNotExists([]byte("widgets"))
assert.NotNil(t, b)
assert.NoError(t, err)
b, err = tx.CreateBucketIfNotExists([]byte("widgets"))
assert.NotNil(t, b)
assert.NoError(t, err)
b, err = tx.CreateBucketIfNotExists([]byte{})
assert.Nil(t, b)
assert.Equal(t, ErrBucketNameRequired, err)
b, err = tx.CreateBucketIfNotExists(nil)
assert.Nil(t, b)
assert.Equal(t, ErrBucketNameRequired, err)
return nil
})
// Read the bucket through a separate transaction.
db.View(func(tx *Tx) error {
b := tx.Bucket([]byte("widgets"))
assert.NotNil(t, b)
return nil
})
})
}
// Ensure that a bucket cannot be created twice.
func TestTx_CreateBucket_Exists(t *testing.T) {
withOpenDB(func(db *DB, path string) {
// Create a bucket.
db.Update(func(tx *Tx) error {
b, err := tx.CreateBucket([]byte("widgets"))
assert.NotNil(t, b)
assert.NoError(t, err)
return nil
})
// Create the same bucket again.
db.Update(func(tx *Tx) error {
b, err := tx.CreateBucket([]byte("widgets"))
assert.Nil(t, b)
assert.Equal(t, ErrBucketExists, err)
return nil
})
})
}
// Ensure that a bucket is created with a non-blank name.
func TestTx_CreateBucket_NameRequired(t *testing.T) {
withOpenDB(func(db *DB, path string) {
db.Update(func(tx *Tx) error {
b, err := tx.CreateBucket(nil)
assert.Nil(t, b)
assert.Equal(t, ErrBucketNameRequired, err)
return nil
})
})
}
// Ensure that a bucket can be deleted.
func TestTx_DeleteBucket(t *testing.T) {
withOpenDB(func(db *DB, path string) {
// Create a bucket and add a value.
db.Update(func(tx *Tx) error {
tx.CreateBucket([]byte("widgets"))
tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
return nil
})
// Save root page id.
var root pgid
db.View(func(tx *Tx) error {
root = tx.Bucket([]byte("widgets")).root
return nil
})
// Delete the bucket and make sure we can't get the value.
db.Update(func(tx *Tx) error {
assert.NoError(t, tx.DeleteBucket([]byte("widgets")))
assert.Nil(t, tx.Bucket([]byte("widgets")))
return nil
})
db.Update(func(tx *Tx) error {
// Verify that the bucket's page is free.
assert.Equal(t, []pgid{7, 6, root, 2}, db.freelist.all())
// Create the bucket again and make sure there's not a phantom value.
b, err := tx.CreateBucket([]byte("widgets"))
assert.NotNil(t, b)
assert.NoError(t, err)
assert.Nil(t, tx.Bucket([]byte("widgets")).Get([]byte("foo")))
return nil
})
})
}
// Ensure that deleting a bucket on a closed transaction returns an error.
func TestTx_DeleteBucket_Closed(t *testing.T) {
withOpenDB(func(db *DB, path string) {
tx, _ := db.Begin(true)
tx.Commit()
assert.Equal(t, tx.DeleteBucket([]byte("foo")), ErrTxClosed)
})
}
// Ensure that deleting a bucket with a read-only transaction returns an error.
func TestTx_DeleteBucket_ReadOnly(t *testing.T) {
withOpenDB(func(db *DB, path string) {
db.View(func(tx *Tx) error {
assert.Equal(t, tx.DeleteBucket([]byte("foo")), ErrTxNotWritable)
return nil
})
})
}
// Ensure that nothing happens when deleting a bucket that doesn't exist.
func TestTx_DeleteBucket_NotFound(t *testing.T) {
withOpenDB(func(db *DB, path string) {
db.Update(func(tx *Tx) error {
assert.Equal(t, ErrBucketNotFound, tx.DeleteBucket([]byte("widgets")))
return nil
})
})
}
// Ensure that Tx commit handlers are called after a transaction successfully commits.
func TestTx_OnCommit(t *testing.T) {
var x int
withOpenDB(func(db *DB, path string) {
db.Update(func(tx *Tx) error {
tx.OnCommit(func() { x += 1 })
tx.OnCommit(func() { x += 2 })
_, err := tx.CreateBucket([]byte("widgets"))
return err
})
})
assert.Equal(t, 3, x)
}
// Ensure that Tx commit handlers are NOT called after a transaction rolls back.
func TestTx_OnCommit_Rollback(t *testing.T) {
var x int
withOpenDB(func(db *DB, path string) {
db.Update(func(tx *Tx) error {
tx.OnCommit(func() { x += 1 })
tx.OnCommit(func() { x += 2 })
tx.CreateBucket([]byte("widgets"))
return errors.New("rollback this commit")
})
})
assert.Equal(t, 0, x)
}
// func BenchmarkReadSequential_1Concurrency_1Buckets_1Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1, 1)
// }
// func BenchmarkReadSequential_1Concurrency_1Buckets_10Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10, 1)
// }
// func BenchmarkReadSequential_1Concurrency_1Buckets_100Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 100, 1)
// }
// func BenchmarkReadSequential_1Concurrency_1Buckets_1000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1000, 1)
// }
// func BenchmarkReadSequential_1Concurrency_1Buckets_10000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10000, 1)
// }
// func BenchmarkReadSequential_10Concurrency_1Buckets_1Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1, 10)
// }
// func BenchmarkReadSequential_10Concurrency_1Buckets_10Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10, 10)
// }
// func BenchmarkReadSequential_10Concurrency_1Buckets_100Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 100, 10)
// }
// func BenchmarkReadSequential_10Concurrency_1Buckets_1000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1000, 10)
// }
// func BenchmarkReadSequential_10Concurrency_1Buckets_10000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10000, 10)
// }
// func BenchmarkReadSequential_100Concurrency_1Buckets_1Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1, 100)
// }
// func BenchmarkReadSequential_100Concurrency_1Buckets_10Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10, 100)
// }
// func BenchmarkReadSequential_100Concurrency_1Buckets_100Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 100, 100)
// }
// func BenchmarkReadSequential_100Concurrency_1Buckets_1000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1000, 100)
// }
// func BenchmarkReadSequential_100Concurrency_1Buckets_10000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10000, 100)
// }
// func BenchmarkReadSequential_1000Concurrency_1Buckets_1Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1, 1000)
// }
// func BenchmarkReadSequential_1000Concurrency_1Buckets_10Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10, 1000)
// }
// func BenchmarkReadSequential_1000Concurrency_1Buckets_100Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 100, 1000)
// }
// func BenchmarkReadSequential_1000Concurrency_1Buckets_1000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1000, 1000)
// }
// func BenchmarkReadSequential_1000Concurrency_1Buckets_10000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10000, 1000)
// }
// func BenchmarkReadSequential_10000Concurrency_1Buckets_1Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1, 10000)
// }
// func BenchmarkReadSequential_10000Concurrency_1Buckets_10Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10, 10000)
// }
// func BenchmarkReadSequential_10000Concurrency_1Buckets_100Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 100, 10000)
// }
// func BenchmarkReadSequential_10000Concurrency_1Buckets_1000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 1000, 10000)
// }
// func BenchmarkReadSequential_10000Concurrency_1Buckets_10000Items(b *testing.B) {
// benchmarkReadSequential(b, 1, 10000, 10000)
// }
// func benchmark(b *testing.B, readWriteMode, traversalPattern string, numBuckets, numItemsPerBucket, parallelism int) {
// withOpenDB(func(db *DB, path string) {
// if err := bench.GenerateDB(db, numBuckets, numItemsPerBucket); err != nil {
// b.Fatal(err)
// }
// bench.New(db, &bench.Config{
// ReadWriteMode: readWriteMode,
// TraversalPattern: traversalPattern,
// Parallelism: parallelism,
// }).Run(b)
// })
// }
// func benchmarkRead(b *testing.B, traversalPattern string, numBuckets, numItemsPerBucket, parallelism int) {
// benchmark(b, bench.BenchReadMode, traversalPattern, numBuckets, numItemsPerBucket, parallelism)
// }
// func benchmarkReadSequential(b *testing.B, numBuckets, numItemsPerBucket, parallelism int) {
// benchmark(b, bench.BenchReadMode, bench.BenchSequentialTraversal, numBuckets, numItemsPerBucket, parallelism)
// }
// func benchmarkReadRandom(b *testing.B, numBuckets, numItemsPerBucket, parallelism int) {
// benchmark(b, bench.BenchReadMode, bench.BenchRandomTraversal, numBuckets, numItemsPerBucket, parallelism)
// }
// Benchmark the performance iterating over a cursor.
func BenchmarkTxCursor1(b *testing.B) { benchmarkTxCursor(b, 1) }
func BenchmarkTxCursor10(b *testing.B) { benchmarkTxCursor(b, 10) }
func BenchmarkTxCursor100(b *testing.B) { benchmarkTxCursor(b, 100) }
func BenchmarkTxCursor1000(b *testing.B) { benchmarkTxCursor(b, 1000) }
func BenchmarkTxCursor10000(b *testing.B) { benchmarkTxCursor(b, 10000) }
func benchmarkTxCursor(b *testing.B, total int) {
indexes := rand.Perm(total)
value := []byte(strings.Repeat("0", 100))
withOpenDB(func(db *DB, path string) {
// Write data to bucket.
db.Update(func(tx *Tx) error {
tx.CreateBucket([]byte("widgets"))
bucket := tx.Bucket([]byte("widgets"))
for i := 0; i < total; i++ {
bucket.Put([]byte(fmt.Sprintf("%016d", indexes[i])), value)
}
return nil
})
b.ResetTimer()
// Iterate over bucket using cursor.
for i := 0; i < b.N; i++ {
db.View(func(tx *Tx) error {
count := 0
c := tx.Bucket([]byte("widgets")).Cursor()
for k, _ := c.First(); k != nil; k, _ = c.Next() {
count++
}
if count != total {
b.Fatalf("wrong count: %d; expected: %d", count, total)
}
return nil
})
}
})
}
// Benchmark the performance of bulk put transactions in random order.
func BenchmarkTxPutRandom1(b *testing.B) { benchmarkTxPutRandom(b, 1) }
func BenchmarkTxPutRandom10(b *testing.B) { benchmarkTxPutRandom(b, 10) }
func BenchmarkTxPutRandom100(b *testing.B) { benchmarkTxPutRandom(b, 100) }
func BenchmarkTxPutRandom1000(b *testing.B) { benchmarkTxPutRandom(b, 1000) }
func BenchmarkTxPutRandom10000(b *testing.B) { benchmarkTxPutRandom(b, 10000) }
func benchmarkTxPutRandom(b *testing.B, total int) {
indexes := rand.Perm(total)
value := []byte(strings.Repeat("0", 64))
withOpenDB(func(db *DB, path string) {
db.Update(func(tx *Tx) error {
_, err := tx.CreateBucket([]byte("widgets"))
return err
})
var tx *Tx
var bucket *Bucket
for j := 0; j < b.N; j++ {
for i := 0; i < total; i++ {
if i%1000 == 0 {
if tx != nil {
tx.Commit()
}
tx, _ = db.Begin(true)
bucket = tx.Bucket([]byte("widgets"))
}
bucket.Put([]byte(strconv.Itoa(indexes[i])), value)
}
}
tx.Commit()
})
}
// Benchmark the performance of bulk put transactions in sequential order.
func BenchmarkTxPutSequential1(b *testing.B) { benchmarkTxPutSequential(b, 1) }
func BenchmarkTxPutSequential10(b *testing.B) { benchmarkTxPutSequential(b, 10) }
func BenchmarkTxPutSequential100(b *testing.B) { benchmarkTxPutSequential(b, 100) }
func BenchmarkTxPutSequential1000(b *testing.B) { benchmarkTxPutSequential(b, 1000) }
func BenchmarkTxPutSequential10000(b *testing.B) { benchmarkTxPutSequential(b, 10000) }
func benchmarkTxPutSequential(b *testing.B, total int) {
value := []byte(strings.Repeat("0", 64))
withOpenDB(func(db *DB, path string) {
db.Update(func(tx *Tx) error {
_, err := tx.CreateBucket([]byte("widgets"))
return err
})
db.Update(func(tx *Tx) error {
bucket := tx.Bucket([]byte("widgets"))
for j := 0; j < b.N; j++ {
for i := 0; i < total; i++ {
bucket.Put([]byte(strconv.Itoa(i)), value)
}
}
return nil
})
})
}
func ExampleTx_Rollback() {
// Open the database.
db, _ := Open(tempfile(), 0666)
defer os.Remove(db.Path())
defer db.Close()
// Create a bucket.
db.Update(func(tx *Tx) error {
_, err := tx.CreateBucket([]byte("widgets"))
return err
})
// Set a value for a key.
db.Update(func(tx *Tx) error {
return tx.Bucket([]byte("widgets")).Put([]byte("foo"), []byte("bar"))
})
// Update the key but rollback the transaction so it never saves.
tx, _ := db.Begin(true)
b := tx.Bucket([]byte("widgets"))
b.Put([]byte("foo"), []byte("baz"))
tx.Rollback()
// Ensure that our original value is still set.
db.View(func(tx *Tx) error {
value := tx.Bucket([]byte("widgets")).Get([]byte("foo"))
fmt.Printf("The value for 'foo' is still: %s\n", string(value))
return nil
})
// Output:
// The value for 'foo' is still: bar
}
|