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test_database.go
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test_database.go
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// (c) 2019-2020, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package database
import (
"bytes"
"crypto/rand"
"testing"
)
// Tests is a list of all database tests
var Tests = []func(t *testing.T, db Database){
TestSimpleKeyValue,
TestSimpleKeyValueClosed,
TestBatchPut,
TestBatchDelete,
TestBatchReset,
TestBatchReuse,
TestBatchRewrite,
TestBatchReplay,
TestBatchInner,
TestBatchLargeSize,
TestIterator,
TestIteratorStart,
TestIteratorPrefix,
TestIteratorStartPrefix,
TestIteratorMemorySafety,
TestIteratorClosed,
TestIteratorError,
TestIteratorErrorAfterRelease,
TestStatNoPanic,
TestCompactNoPanic,
TestMemorySafetyDatabase,
TestMemorySafetyBatch,
}
// TestSimpleKeyValue tests to make sure that simple Put + Get + Delete + Has
// calls return the expected values.
func TestSimpleKeyValue(t *testing.T, db Database) {
key := []byte("hello")
value := []byte("world")
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if has {
t.Fatalf("db.Has unexpectedly returned true on key %s", key)
} else if v, err := db.Get(key); err != ErrNotFound {
t.Fatalf("Expected %s on db.Get for missing key %s. Returned 0x%x", ErrNotFound, key, v)
} else if err := db.Delete(key); err != nil {
t.Fatalf("Unexpected error on db.Delete: %s", err)
}
if err := db.Put(key, value); err != nil {
t.Fatalf("Unexpected error on db.Put: %s", err)
}
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key)
} else if v, err := db.Get(key); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(value, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value)
}
if err := db.Delete(key); err != nil {
t.Fatalf("Unexpected error on db.Delete: %s", err)
}
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if has {
t.Fatalf("db.Has unexpectedly returned true on key %s", key)
} else if v, err := db.Get(key); err != ErrNotFound {
t.Fatalf("Expected %s on db.Get for missing key %s. Returned 0x%x", ErrNotFound, key, v)
} else if err := db.Delete(key); err != nil {
t.Fatalf("Unexpected error on db.Delete: %s", err)
}
}
// TestSimpleKeyValueClosed tests to make sure that Put + Get + Delete + Has
// calls return the correct error when the database has been closed.
func TestSimpleKeyValueClosed(t *testing.T, db Database) {
key := []byte("hello")
value := []byte("world")
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if has {
t.Fatalf("db.Has unexpectedly returned true on key %s", key)
} else if v, err := db.Get(key); err != ErrNotFound {
t.Fatalf("Expected %s on db.Get for missing key %s. Returned 0x%x", ErrNotFound, key, v)
} else if err := db.Delete(key); err != nil {
t.Fatalf("Unexpected error on db.Delete: %s", err)
}
if err := db.Put(key, value); err != nil {
t.Fatalf("Unexpected error on db.Put: %s", err)
}
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key)
} else if v, err := db.Get(key); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(value, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value)
}
if err := db.Close(); err != nil {
t.Fatalf("Unexpected error on db.Close: %s", err)
}
if _, err := db.Has(key); err != ErrClosed {
t.Fatalf("Expected %s on db.Has after close", ErrClosed)
} else if _, err := db.Get(key); err != ErrClosed {
t.Fatalf("Expected %s on db.Get after close", ErrClosed)
} else if err := db.Put(key, value); err != ErrClosed {
t.Fatalf("Expected %s on db.Put after close", ErrClosed)
} else if err := db.Delete(key); err != ErrClosed {
t.Fatalf("Expected %s on db.Delete after close", ErrClosed)
} else if err := db.Close(); err != ErrClosed {
t.Fatalf("Expected %s on db.Close after close", ErrClosed)
}
}
// TestMemorySafetyDatabase ensures it is safe to modify a key after passing it
// to Database.Put and Database.Get.
func TestMemorySafetyDatabase(t *testing.T, db Database) {
key := []byte("key")
value := []byte("value")
key2 := []byte("key2")
value2 := []byte("value2")
// Put both K/V pairs in the database
if err := db.Put(key, value); err != nil {
t.Fatal(err)
} else if err := db.Put(key2, value2); err != nil {
t.Fatal(err)
}
// Get the value for [key]
gotVal, err := db.Get(key)
if err != nil {
t.Fatalf("should have been able to get value but got %s", err)
} else if !bytes.Equal(gotVal, value) {
t.Fatal("got the wrong value")
}
// Modify [key]; make sure the value we got before hasn't changed
key = key2
gotVal2, err := db.Get(key)
switch {
case err != nil:
t.Fatal(err)
case !bytes.Equal(gotVal2, value2):
t.Fatal("got wrong value")
case !bytes.Equal(gotVal, value):
t.Fatal("value changed")
}
// Reset [key] to its original value and make sure it's correct
key = []byte("key")
gotVal, err = db.Get(key)
if err != nil {
t.Fatalf("should have been able to get value but got %s", err)
} else if !bytes.Equal(gotVal, value) {
t.Fatal("got the wrong value")
}
}
// TestBatchPut tests to make sure that batched writes work as expected.
func TestBatchPut(t *testing.T, db Database) {
key := []byte("hello")
value := []byte("world")
batch := db.NewBatch()
if batch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := batch.Put(key, value); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if size := batch.Size(); size <= 0 {
t.Fatalf("batch.Size: Returned: %d ; Expected: > 0", size)
}
if err := batch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key)
} else if v, err := db.Get(key); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(value, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value)
} else if err := db.Delete(key); err != nil {
t.Fatalf("Unexpected error on db.Delete: %s", err)
}
if batch = db.NewBatch(); batch == nil {
t.Fatalf("db.NewBatch returned nil")
} else if err := batch.Put(key, value); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Close(); err != nil {
t.Fatalf("Error while closing the database: %s", err)
} else if err := batch.Write(); err != ErrClosed {
t.Fatalf("Expected %s on batch.Write", ErrClosed)
}
}
// TestBatchDelete tests to make sure that batched deletes work as expected.
func TestBatchDelete(t *testing.T, db Database) {
key := []byte("hello")
value := []byte("world")
if err := db.Put(key, value); err != nil {
t.Fatalf("Unexpected error on db.Put: %s", err)
}
batch := db.NewBatch()
if batch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := batch.Delete(key); err != nil {
t.Fatalf("Unexpected error on batch.Delete: %s", err)
}
if err := batch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if has {
t.Fatalf("db.Has unexpectedly returned true on key %s", key)
} else if v, err := db.Get(key); err != ErrNotFound {
t.Fatalf("Expected %s on db.Get for missing key %s. Returned 0x%x", ErrNotFound, key, v)
} else if err := db.Delete(key); err != nil {
t.Fatalf("Unexpected error on db.Delete: %s", err)
}
}
// TestMemorySafetyDatabase ensures it is safe to modify a key after passing it
// to Batch.Put.
func TestMemorySafetyBatch(t *testing.T, db Database) {
key := []byte("hello")
value := []byte("world")
valueCopy := []byte("world")
batch := db.NewBatch()
if batch == nil {
t.Fatalf("db.NewBatch returned nil")
}
// Put a key in the batch
if err := batch.Put(key, value); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if size := batch.Size(); size <= 0 {
t.Fatalf("batch.Size: Returned: %d ; Expected: > 0", size)
}
// Modify the key
keyCopy := key
key = []byte("jello")
if err := batch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
// Make sure the original key was written to the database
if has, err := db.Has(keyCopy); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key)
} else if v, err := db.Get(keyCopy); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(valueCopy, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value)
}
// Make sure the new key wasn't written to the database
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if has {
t.Fatal("database shouldn't have the new key")
}
}
// TestBatchReset tests to make sure that a batch drops un-written operations
// when it is reset.
func TestBatchReset(t *testing.T, db Database) {
key := []byte("hello")
value := []byte("world")
if err := db.Put(key, value); err != nil {
t.Fatalf("Unexpected error on db.Put: %s", err)
}
batch := db.NewBatch()
if batch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := batch.Delete(key); err != nil {
t.Fatalf("Unexpected error on batch.Delete: %s", err)
}
batch.Reset()
if err := batch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key)
} else if v, err := db.Get(key); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(value, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value)
}
}
// TestBatchReuse tests to make sure that a batch can be reused once it is
// reset.
func TestBatchReuse(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
key2 := []byte("hello2")
value2 := []byte("world2")
batch := db.NewBatch()
if batch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := batch.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
if err := batch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
if err := db.Delete(key1); err != nil {
t.Fatalf("Unexpected error on database.Delete: %s", err)
}
if has, err := db.Has(key1); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if has {
t.Fatalf("db.Has unexpectedly returned true on key %s", key1)
}
batch.Reset()
if err := batch.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
if err := batch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
if has, err := db.Has(key1); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if has {
t.Fatalf("db.Has unexpectedly returned true on key %s", key1)
} else if has, err := db.Has(key2); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key2)
} else if v, err := db.Get(key2); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(value2, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value2)
}
}
// TestBatchRewrite tests to make sure that write can be called multiple times
// on a batch and the values will be updated correctly.
func TestBatchRewrite(t *testing.T, db Database) {
key := []byte("hello1")
value := []byte("world1")
batch := db.NewBatch()
if batch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := batch.Put(key, value); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
if err := batch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
if err := db.Delete(key); err != nil {
t.Fatalf("Unexpected error on database.Delete: %s", err)
}
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if has {
t.Fatalf("db.Has unexpectedly returned true on key %s", key)
}
if err := batch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
if has, err := db.Has(key); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key)
} else if v, err := db.Get(key); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(value, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value)
}
}
// TestBatchReplay tests to make sure that batches will correctly replay their
// contents.
func TestBatchReplay(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
key2 := []byte("hello2")
value2 := []byte("world2")
batch := db.NewBatch()
if batch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := batch.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := batch.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
secondBatch := db.NewBatch()
if secondBatch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := batch.Replay(secondBatch); err != nil {
t.Fatalf("Unexpected error on batch.Replay: %s", err)
}
if err := secondBatch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
if has, err := db.Has(key1); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key1)
} else if v, err := db.Get(key1); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(value1, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value1)
}
thirdBatch := db.NewBatch()
if thirdBatch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := thirdBatch.Delete(key1); err != nil {
t.Fatalf("Unexpected error on batch.Delete: %s", err)
} else if err := thirdBatch.Delete(key2); err != nil {
t.Fatalf("Unexpected error on batch.Delete: %s", err)
}
if err := db.Close(); err != nil {
t.Fatalf("Unexpected error on db.Close: %s", err)
}
if err := batch.Replay(db); err != ErrClosed {
t.Fatalf("Expected %s on batch.Replay", ErrClosed)
} else if err := thirdBatch.Replay(db); err != ErrClosed {
t.Fatalf("Expected %s on batch.Replay", ErrClosed)
}
}
// TestBatchInner tests to make sure that inner can be used to write to the
// database.
func TestBatchInner(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
key2 := []byte("hello2")
value2 := []byte("world2")
firstBatch := db.NewBatch()
if firstBatch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := firstBatch.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
secondBatch := db.NewBatch()
if secondBatch == nil {
t.Fatalf("db.NewBatch returned nil")
}
if err := secondBatch.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
innerFirstBatch := firstBatch.Inner()
innerSecondBatch := secondBatch.Inner()
if err := innerFirstBatch.Replay(innerSecondBatch); err != nil {
t.Fatalf("Unexpected error on batch.Replay: %s", err)
}
if err := innerSecondBatch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
if has, err := db.Has(key1); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key1)
} else if v, err := db.Get(key1); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(value1, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value1)
} else if has, err := db.Has(key2); err != nil {
t.Fatalf("Unexpected error on db.Has: %s", err)
} else if !has {
t.Fatalf("db.Has unexpectedly returned false on key %s", key2)
} else if v, err := db.Get(key2); err != nil {
t.Fatalf("Unexpected error on db.Get: %s", err)
} else if !bytes.Equal(value2, v) {
t.Fatalf("db.Get: Returned: 0x%x ; Expected: 0x%x", v, value2)
}
}
// TestBatchLargeSize tests to make sure that the batch can support a large
// amount of entries.
//nolint:interfacer // This function must match the test function definition
func TestBatchLargeSize(t *testing.T, db Database) {
totalSize := 8 * 1024 * 1024 // 8 MiB
elementSize := 4 * 1024 // 4 KiB
pairSize := 2 * elementSize // 8 KiB
bytes := make([]byte, totalSize)
_, err := rand.Read(bytes)
if err != nil {
t.Fatal(err)
}
batch := db.NewBatch()
if batch == nil {
t.Fatalf("db.NewBatch returned nil")
}
for len(bytes) > pairSize {
key := bytes[:elementSize]
bytes = bytes[elementSize:]
value := bytes[:elementSize]
bytes = bytes[elementSize:]
if err := batch.Put(key, value); err != nil {
t.Fatal(err)
}
}
if err := batch.Write(); err != nil {
t.Fatalf("Unexpected error on batch.Write: %s", err)
}
}
// TestIterator tests to make sure the database iterates over the database
// contents lexicographically.
func TestIterator(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
key2 := []byte("hello2")
value2 := []byte("world2")
if err := db.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
iterator := db.NewIterator()
if iterator == nil {
t.Fatalf("db.NewIterator returned nil")
}
defer iterator.Release()
if !iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", false, true)
} else if key := iterator.Key(); !bytes.Equal(key, key1) {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: 0x%x", key, key1)
} else if value := iterator.Value(); !bytes.Equal(value, value1) {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: 0x%x", value, value1)
} else if !iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", false, true)
} else if key := iterator.Key(); !bytes.Equal(key, key2) {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: 0x%x", key, key2)
} else if value := iterator.Value(); !bytes.Equal(value, value2) {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: 0x%x", value, value2)
} else if iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", true, false)
} else if key := iterator.Key(); key != nil {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: nil", key)
} else if value := iterator.Value(); value != nil {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: nil", value)
} else if err := iterator.Error(); err != nil {
t.Fatalf("iterator.Error Returned: %s ; Expected: nil", err)
}
}
// TestIteratorStart tests to make sure the the iterator can be configured to
// start mid way through the database.
func TestIteratorStart(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
key2 := []byte("hello2")
value2 := []byte("world2")
if err := db.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
iterator := db.NewIteratorWithStart(key2)
if iterator == nil {
t.Fatalf("db.NewIteratorWithStart returned nil")
}
defer iterator.Release()
if !iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", false, true)
} else if key := iterator.Key(); !bytes.Equal(key, key2) {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: 0x%x", key, key2)
} else if value := iterator.Value(); !bytes.Equal(value, value2) {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: 0x%x", value, value2)
} else if iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", true, false)
} else if key := iterator.Key(); key != nil {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: nil", key)
} else if value := iterator.Value(); value != nil {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: nil", value)
} else if err := iterator.Error(); err != nil {
t.Fatalf("iterator.Error Returned: %s ; Expected: nil", err)
}
}
// TestIteratorPrefix tests to make sure the iterator can be configured to skip
// keys missing the provided prefix.
func TestIteratorPrefix(t *testing.T, db Database) {
key1 := []byte("hello")
value1 := []byte("world1")
key2 := []byte("goodbye")
value2 := []byte("world2")
if err := db.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
iterator := db.NewIteratorWithPrefix([]byte("h"))
if iterator == nil {
t.Fatalf("db.NewIteratorWithPrefix returned nil")
}
defer iterator.Release()
if !iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", false, true)
} else if key := iterator.Key(); !bytes.Equal(key, key1) {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: 0x%x", key, key1)
} else if value := iterator.Value(); !bytes.Equal(value, value1) {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: 0x%x", value, value1)
} else if iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", true, false)
} else if key := iterator.Key(); key != nil {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: nil", key)
} else if value := iterator.Value(); value != nil {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: nil", value)
} else if err := iterator.Error(); err != nil {
t.Fatalf("iterator.Error Returned: %s ; Expected: nil", err)
}
}
// TestIteratorStartPrefix tests to make sure that the iterator can start mid
// way through the database while skipping a prefix.
func TestIteratorStartPrefix(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
key2 := []byte("z")
value2 := []byte("world2")
key3 := []byte("hello3")
value3 := []byte("world3")
if err := db.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key3, value3); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
iterator := db.NewIteratorWithStartAndPrefix(key1, []byte("h"))
if iterator == nil {
t.Fatalf("db.NewIteratorWithStartAndPrefix returned nil")
}
defer iterator.Release()
if !iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", false, true)
} else if key := iterator.Key(); !bytes.Equal(key, key1) {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: 0x%x", key, key1)
} else if value := iterator.Value(); !bytes.Equal(value, value1) {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: 0x%x", value, value1)
} else if !iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", false, true)
} else if key := iterator.Key(); !bytes.Equal(key, key3) {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: 0x%x", key, key3)
} else if value := iterator.Value(); !bytes.Equal(value, value3) {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: 0x%x", value, value3)
} else if iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", true, false)
} else if key := iterator.Key(); key != nil {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: nil", key)
} else if value := iterator.Value(); value != nil {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: nil", value)
} else if err := iterator.Error(); err != nil {
t.Fatalf("iterator.Error Returned: %s ; Expected: nil", err)
}
}
// TestIteratorMemorySafety tests to make sure that keys can values are able to
// be modified from the returned iterator.
func TestIteratorMemorySafety(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
key2 := []byte("z")
value2 := []byte("world2")
key3 := []byte("hello3")
value3 := []byte("world3")
if err := db.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key3, value3); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
iterator := db.NewIterator()
if iterator == nil {
t.Fatalf("db.NewIterator returned nil")
}
defer iterator.Release()
keys := [][]byte{}
values := [][]byte{}
for iterator.Next() {
keys = append(keys, iterator.Key())
values = append(values, iterator.Value())
}
expectedKeys := [][]byte{
key1,
key3,
key2,
}
expectedValues := [][]byte{
value1,
value3,
value2,
}
for i, key := range keys {
value := values[i]
expectedKey := expectedKeys[i]
expectedValue := expectedValues[i]
if !bytes.Equal(key, expectedKey) {
t.Fatalf("Wrong key")
}
if !bytes.Equal(value, expectedValue) {
t.Fatalf("Wrong key")
}
}
}
// TestIteratorClosed tests to make sure that an iterator that was created with
// a closed database will report a closed error correctly.
func TestIteratorClosed(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
if err := db.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
if err := db.Close(); err != nil {
t.Fatalf("Unexpected error on db.Close: %s", err)
}
iterator := db.NewIterator()
if iterator == nil {
t.Fatalf("db.NewIterator returned nil")
}
defer iterator.Release()
if iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", true, false)
} else if key := iterator.Key(); key != nil {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: nil", key)
} else if value := iterator.Value(); value != nil {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: nil", value)
} else if err := iterator.Error(); err != ErrClosed {
t.Fatalf("Expected %s on iterator.Error", ErrClosed)
}
}
// TestIteratorError tests to make sure that an iterator still works after the
// database is closed.
func TestIteratorError(t *testing.T, db Database) {
key := []byte("hello1")
value := []byte("world1")
if err := db.Put(key, value); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
iterator := db.NewIterator()
if iterator == nil {
t.Fatalf("db.NewIterator returned nil")
}
defer iterator.Release()
if err := db.Close(); err != nil {
t.Fatalf("Unexpected error on db.Close: %s", err)
}
if !iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", false, true)
}
if itKey := iterator.Key(); !bytes.Equal(itKey, key) {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: 0x%x", itKey, key)
}
if itValue := iterator.Value(); !bytes.Equal(itValue, value) {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: 0x%x", itValue, value)
}
if err := iterator.Error(); err != nil {
t.Fatalf("Expected no error on iterator.Error but got %s", err)
}
}
// TestIteratorErrorAfterRelease tests to make sure that an iterator that was
// released still reports the error correctly.
func TestIteratorErrorAfterRelease(t *testing.T, db Database) {
key := []byte("hello1")
value := []byte("world1")
if err := db.Put(key, value); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
if err := db.Close(); err != nil {
t.Fatalf("Unexpected error on db.Close: %s", err)
}
iterator := db.NewIterator()
if iterator == nil {
t.Fatalf("db.NewIterator returned nil")
}
iterator.Release()
if iterator.Next() {
t.Fatalf("iterator.Next Returned: %v ; Expected: %v", false, true)
}
if key := iterator.Key(); key != nil {
t.Fatalf("iterator.Key Returned: 0x%x ; Expected: nil", key)
}
if value := iterator.Value(); value != nil {
t.Fatalf("iterator.Value Returned: 0x%x ; Expected: nil", value)
}
if err := iterator.Error(); err != ErrClosed {
t.Fatalf("Expected %s on iterator.Error", ErrClosed)
}
}
// TestStatNoPanic tests to make sure that Stat never panics.
func TestStatNoPanic(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
key2 := []byte("z")
value2 := []byte("world2")
key3 := []byte("hello3")
value3 := []byte("world3")
if err := db.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key3, value3); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
// Stat could error or not redpending on the implementation, but it
// shouldn't panic
_, _ = db.Stat("")
if err := db.Close(); err != nil {
t.Fatalf("Unexpected error on db.Close: %s", err)
}
// Stat could error or not redpending on the implementation, but it
// shouldn't panic
_, _ = db.Stat("")
}
// TestCompactNoPanic tests to make sure compact never panics.
func TestCompactNoPanic(t *testing.T, db Database) {
key1 := []byte("hello1")
value1 := []byte("world1")
key2 := []byte("z")
value2 := []byte("world2")
key3 := []byte("hello3")
value3 := []byte("world3")
if err := db.Put(key1, value1); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key2, value2); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
} else if err := db.Put(key3, value3); err != nil {
t.Fatalf("Unexpected error on batch.Put: %s", err)
}
if err := db.Compact(nil, nil); err != nil {
t.Fatalf("Unexpected error on db.Compact")
}
if err := db.Close(); err != nil {
t.Fatalf("Unexpected error on db.Close: %s", err)
}
if err := db.Compact(nil, nil); err != ErrClosed {
t.Fatalf("Expected error %s on db.Close but got %s", ErrClosed, err)
}
}