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104 lines
2.9 KiB
104 lines
2.9 KiB
// Copyright 2016 PingCAP, Inc.
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//
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// Licensed under the Apache License, Version 2.0 (the "License");
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// you may not use this file except in compliance with the License.
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// You may obtain a copy of the License at
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//
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// http://www.apache.org/licenses/LICENSE-2.0
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//
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// Unless required by applicable law or agreed to in writing, software
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// distributed under the License is distributed on an "AS IS" BASIS,
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// See the License for the specific language governing permissions and
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// limitations under the License.
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package tikv
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import (
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"context"
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. "github.com/pingcap/check"
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"github.com/pingcap/tidb/kv"
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"github.com/pingcap/tidb/store/mockstore/mocktikv"
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)
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type testSplitSuite struct {
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OneByOneSuite
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cluster *mocktikv.Cluster
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store *tikvStore
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bo *Backoffer
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}
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var _ = Suite(&testSplitSuite{})
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func (s *testSplitSuite) SetUpTest(c *C) {
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s.cluster = mocktikv.NewCluster()
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mocktikv.BootstrapWithSingleStore(s.cluster)
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client, pdClient, err := mocktikv.NewTiKVAndPDClient(s.cluster, nil, "")
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c.Assert(err, IsNil)
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store, err := NewTestTiKVStore(client, pdClient, nil, nil, 0)
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c.Check(err, IsNil)
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s.store = store.(*tikvStore)
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s.bo = NewBackofferWithVars(context.Background(), 5000, nil)
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}
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func (s *testSplitSuite) begin(c *C) *tikvTxn {
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txn, err := s.store.Begin()
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c.Assert(err, IsNil)
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return txn.(*tikvTxn)
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}
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func (s *testSplitSuite) split(c *C, regionID uint64, key []byte) {
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newRegionID, peerID := s.cluster.AllocID(), s.cluster.AllocID()
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s.cluster.Split(regionID, newRegionID, key, []uint64{peerID}, peerID)
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}
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func (s *testSplitSuite) TestSplitBatchGet(c *C) {
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loc, err := s.store.regionCache.LocateKey(s.bo, []byte("a"))
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c.Assert(err, IsNil)
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txn := s.begin(c)
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snapshot := newTiKVSnapshot(s.store, kv.Version{Ver: txn.StartTS()}, 0)
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keys := [][]byte{{'a'}, {'b'}, {'c'}}
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_, region, err := s.store.regionCache.GroupKeysByRegion(s.bo, keys, nil)
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c.Assert(err, IsNil)
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batch := batchKeys{
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region: region,
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keys: keys,
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}
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s.split(c, loc.Region.id, []byte("b"))
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s.store.regionCache.InvalidateCachedRegion(loc.Region)
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// mocktikv will panic if it meets a not-in-region key.
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err = snapshot.batchGetSingleRegion(s.bo, batch, func([]byte, []byte) {})
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c.Assert(err, IsNil)
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}
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func (s *testSplitSuite) TestStaleEpoch(c *C) {
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mockPDClient := &mockPDClient{client: s.store.regionCache.pdClient}
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s.store.regionCache.pdClient = mockPDClient
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loc, err := s.store.regionCache.LocateKey(s.bo, []byte("a"))
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c.Assert(err, IsNil)
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txn := s.begin(c)
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err = txn.Set([]byte("a"), []byte("a"))
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c.Assert(err, IsNil)
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err = txn.Set([]byte("c"), []byte("c"))
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c.Assert(err, IsNil)
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err = txn.Commit(context.Background())
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c.Assert(err, IsNil)
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// Initiate a split and disable the PD client. If it still works, the
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// new region is updated from kvrpc.
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s.split(c, loc.Region.id, []byte("b"))
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mockPDClient.disable()
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txn = s.begin(c)
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_, err = txn.Get(context.TODO(), []byte("a"))
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c.Assert(err, IsNil)
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_, err = txn.Get(context.TODO(), []byte("c"))
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c.Assert(err, IsNil)
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}
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