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union_store_test.go
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// Copyright 2015 PingCAP, Inc.
//
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// See the License for the specific language governing permissions and
// limitations under the License.
package kv
import (
. "github.com/pingcap/check"
"github.com/pingcap/parser/terror"
"github.com/pingcap/tidb/util/testleak"
)
var _ = Suite(&testUnionStoreSuite{})
type testUnionStoreSuite struct {
store MemBuffer
us UnionStore
}
func (s *testUnionStoreSuite) SetUpTest(c *C) {
s.store = NewMemDbBuffer(DefaultTxnMembufCap)
s.us = NewUnionStore(&mockSnapshot{s.store})
}
func (s *testUnionStoreSuite) TestGetSet(c *C) {
defer testleak.AfterTest(c)()
err := s.store.Set([]byte("1"), []byte("1"))
c.Assert(err, IsNil)
v, err := s.us.Get([]byte("1"))
c.Assert(err, IsNil)
c.Assert(v, BytesEquals, []byte("1"))
err = s.us.Set([]byte("1"), []byte("2"))
c.Assert(err, IsNil)
v, err = s.us.Get([]byte("1"))
c.Assert(err, IsNil)
c.Assert(v, BytesEquals, []byte("2"))
}
func (s *testUnionStoreSuite) TestDelete(c *C) {
defer testleak.AfterTest(c)()
err := s.store.Set([]byte("1"), []byte("1"))
c.Assert(err, IsNil)
err = s.us.Delete([]byte("1"))
c.Assert(err, IsNil)
_, err = s.us.Get([]byte("1"))
c.Assert(IsErrNotFound(err), IsTrue)
err = s.us.Set([]byte("1"), []byte("2"))
c.Assert(err, IsNil)
v, err := s.us.Get([]byte("1"))
c.Assert(err, IsNil)
c.Assert(v, BytesEquals, []byte("2"))
}
func (s *testUnionStoreSuite) TestSeek(c *C) {
defer testleak.AfterTest(c)()
err := s.store.Set([]byte("1"), []byte("1"))
c.Assert(err, IsNil)
err = s.store.Set([]byte("2"), []byte("2"))
c.Assert(err, IsNil)
err = s.store.Set([]byte("3"), []byte("3"))
c.Assert(err, IsNil)
iter, err := s.us.Iter(nil, nil)
c.Assert(err, IsNil)
checkIterator(c, iter, [][]byte{[]byte("1"), []byte("2"), []byte("3")}, [][]byte{[]byte("1"), []byte("2"), []byte("3")})
iter, err = s.us.Iter([]byte("2"), nil)
c.Assert(err, IsNil)
checkIterator(c, iter, [][]byte{[]byte("2"), []byte("3")}, [][]byte{[]byte("2"), []byte("3")})
err = s.us.Set([]byte("4"), []byte("4"))
c.Assert(err, IsNil)
iter, err = s.us.Iter([]byte("2"), nil)
c.Assert(err, IsNil)
checkIterator(c, iter, [][]byte{[]byte("2"), []byte("3"), []byte("4")}, [][]byte{[]byte("2"), []byte("3"), []byte("4")})
err = s.us.Delete([]byte("3"))
c.Assert(err, IsNil)
iter, err = s.us.Iter([]byte("2"), nil)
c.Assert(err, IsNil)
checkIterator(c, iter, [][]byte{[]byte("2"), []byte("4")}, [][]byte{[]byte("2"), []byte("4")})
}
func (s *testUnionStoreSuite) TestIterReverse(c *C) {
defer testleak.AfterTest(c)()
err := s.store.Set([]byte("1"), []byte("1"))
c.Assert(err, IsNil)
err = s.store.Set([]byte("2"), []byte("2"))
c.Assert(err, IsNil)
err = s.store.Set([]byte("3"), []byte("3"))
c.Assert(err, IsNil)
iter, err := s.us.IterReverse(nil)
c.Assert(err, IsNil)
checkIterator(c, iter, [][]byte{[]byte("3"), []byte("2"), []byte("1")}, [][]byte{[]byte("3"), []byte("2"), []byte("1")})
iter, err = s.us.IterReverse([]byte("3"))
c.Assert(err, IsNil)
checkIterator(c, iter, [][]byte{[]byte("2"), []byte("1")}, [][]byte{[]byte("2"), []byte("1")})
err = s.us.Set([]byte("0"), []byte("0"))
c.Assert(err, IsNil)
iter, err = s.us.IterReverse([]byte("3"))
c.Assert(err, IsNil)
checkIterator(c, iter, [][]byte{[]byte("2"), []byte("1"), []byte("0")}, [][]byte{[]byte("2"), []byte("1"), []byte("0")})
err = s.us.Delete([]byte("1"))
c.Assert(err, IsNil)
iter, err = s.us.IterReverse([]byte("3"))
c.Assert(err, IsNil)
checkIterator(c, iter, [][]byte{[]byte("2"), []byte("0")}, [][]byte{[]byte("2"), []byte("0")})
}
func (s *testUnionStoreSuite) TestLazyConditionCheck(c *C) {
defer testleak.AfterTest(c)()
err := s.store.Set([]byte("1"), []byte("1"))
c.Assert(err, IsNil)
err = s.store.Set([]byte("2"), []byte("2"))
c.Assert(err, IsNil)
v, err := s.us.Get([]byte("1"))
c.Assert(err, IsNil)
c.Assert(v, BytesEquals, []byte("1"))
s.us.SetOption(PresumeKeyNotExists, nil)
s.us.SetOption(PresumeKeyNotExistsError, ErrNotExist)
_, err = s.us.Get([]byte("2"))
c.Assert(terror.ErrorEqual(err, ErrNotExist), IsTrue, Commentf("err %v", err))
condionPair1 := s.us.LookupConditionPair([]byte("1"))
c.Assert(condionPair1, IsNil)
condionPair2 := s.us.LookupConditionPair([]byte("2"))
c.Assert(condionPair2, NotNil)
c.Assert(condionPair2.ShouldNotExist(), IsTrue)
err2 := s.us.LookupConditionPair([]byte("2")).Err()
c.Assert(terror.ErrorEqual(err2, ErrNotExist), IsTrue, Commentf("err %v", err2))
}
func checkIterator(c *C, iter Iterator, keys [][]byte, values [][]byte) {
defer iter.Close()
c.Assert(len(keys), Equals, len(values))
for i, k := range keys {
v := values[i]
c.Assert(iter.Valid(), IsTrue)
c.Assert([]byte(iter.Key()), BytesEquals, k)
c.Assert(iter.Value(), BytesEquals, v)
c.Assert(iter.Next(), IsNil)
}
c.Assert(iter.Valid(), IsFalse)
}