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// Copyright 2019 The Go 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 tkvtest contains a test harness for testing tkv.Storage implementations.
package tkvtest
import (
"context"
"fmt"
"io"
"testing"
"golang.org/x/exp/sumdb/internal/tkv"
)
func TestStorage(t *testing.T, ctx context.Context, storage tkv.Storage) {
s := storage
// Insert records.
err := s.ReadWrite(ctx, func(ctx context.Context, tx tkv.Transaction) error {
for i := 0; i < 10; i++ {
err := tx.BufferWrites([]tkv.Write{
{Key: fmt.Sprint(i), Value: fmt.Sprint(-i)},
{Key: fmt.Sprint(1000 + i), Value: fmt.Sprint(-1000 - i)},
})
if err != nil {
t.Fatal(err)
}
}
return nil
})
if err != nil {
t.Fatal(err)
}
// Read the records back.
testRead := func() {
err := s.ReadOnly(ctx, func(ctx context.Context, tx tkv.Transaction) error {
for i := int64(0); i < 1010; i++ {
if i == 10 {
i = 1000
}
val, err := tx.ReadValue(ctx, fmt.Sprint(i))
if err != nil {
t.Fatalf("reading %v: %v", i, err)
}
if val != fmt.Sprint(-i) {
t.Fatalf("ReadValue %v = %q, want %v", i, val, fmt.Sprint(-i))
}
}
return nil
})
if err != nil {
t.Fatal(err)
}
}
testRead()
// Buffered writes in failed transaction should not be applied.
err = s.ReadWrite(ctx, func(ctx context.Context, tx tkv.Transaction) error {
tx.BufferWrites([]tkv.Write{
{Key: fmt.Sprint(0), Value: ""}, // delete
{Key: fmt.Sprint(1), Value: "overwrite"}, // overwrite
})
if err != nil {
t.Fatal(err)
}
return io.ErrUnexpectedEOF
})
if err != io.ErrUnexpectedEOF {
t.Fatalf("ReadWrite returned %v, want ErrUnexpectedEOF", err)
}
// All same values should still be there.
testRead()
}
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