You can not select more than 25 topics Topics must start with a letter or number, can include dashes ('-') and can be up to 35 characters long.
 
 

104 lines
2.9 KiB

// Copyright 2016 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 tikv
import (
"context"
. "github.com/pingcap/check"
"github.com/pingcap/tidb/kv"
"github.com/pingcap/tidb/store/mockstore/mocktikv"
)
type testSplitSuite struct {
OneByOneSuite
cluster *mocktikv.Cluster
store *tikvStore
bo *Backoffer
}
var _ = Suite(&testSplitSuite{})
func (s *testSplitSuite) SetUpTest(c *C) {
s.cluster = mocktikv.NewCluster()
mocktikv.BootstrapWithSingleStore(s.cluster)
client, pdClient, err := mocktikv.NewTiKVAndPDClient(s.cluster, nil, "")
c.Assert(err, IsNil)
store, err := NewTestTiKVStore(client, pdClient, nil, nil, 0)
c.Check(err, IsNil)
s.store = store.(*tikvStore)
s.bo = NewBackofferWithVars(context.Background(), 5000, nil)
}
func (s *testSplitSuite) begin(c *C) *tikvTxn {
txn, err := s.store.Begin()
c.Assert(err, IsNil)
return txn.(*tikvTxn)
}
func (s *testSplitSuite) split(c *C, regionID uint64, key []byte) {
newRegionID, peerID := s.cluster.AllocID(), s.cluster.AllocID()
s.cluster.Split(regionID, newRegionID, key, []uint64{peerID}, peerID)
}
func (s *testSplitSuite) TestSplitBatchGet(c *C) {
loc, err := s.store.regionCache.LocateKey(s.bo, []byte("a"))
c.Assert(err, IsNil)
txn := s.begin(c)
snapshot := newTiKVSnapshot(s.store, kv.Version{Ver: txn.StartTS()}, 0)
keys := [][]byte{{'a'}, {'b'}, {'c'}}
_, region, err := s.store.regionCache.GroupKeysByRegion(s.bo, keys, nil)
c.Assert(err, IsNil)
batch := batchKeys{
region: region,
keys: keys,
}
s.split(c, loc.Region.id, []byte("b"))
s.store.regionCache.InvalidateCachedRegion(loc.Region)
// mocktikv will panic if it meets a not-in-region key.
err = snapshot.batchGetSingleRegion(s.bo, batch, func([]byte, []byte) {})
c.Assert(err, IsNil)
}
func (s *testSplitSuite) TestStaleEpoch(c *C) {
mockPDClient := &mockPDClient{client: s.store.regionCache.pdClient}
s.store.regionCache.pdClient = mockPDClient
loc, err := s.store.regionCache.LocateKey(s.bo, []byte("a"))
c.Assert(err, IsNil)
txn := s.begin(c)
err = txn.Set([]byte("a"), []byte("a"))
c.Assert(err, IsNil)
err = txn.Set([]byte("c"), []byte("c"))
c.Assert(err, IsNil)
err = txn.Commit(context.Background())
c.Assert(err, IsNil)
// Initiate a split and disable the PD client. If it still works, the
// new region is updated from kvrpc.
s.split(c, loc.Region.id, []byte("b"))
mockPDClient.disable()
txn = s.begin(c)
_, err = txn.Get(context.TODO(), []byte("a"))
c.Assert(err, IsNil)
_, err = txn.Get(context.TODO(), []byte("c"))
c.Assert(err, IsNil)
}