// 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 kv import ( "context" "github.com/pingcap/tidb/kv/memdb" "github.com/pingcap/tidb/store/tikv/oracle" ) // mockTxn is a txn that returns a retryAble error when called Commit. type mockTxn struct { opts map[Option]interface{} valid bool } // Commit always returns a retryable error. func (t *mockTxn) Commit(ctx context.Context) error { return ErrTxnRetryable } func (t *mockTxn) Rollback() error { t.valid = false return nil } func (t *mockTxn) String() string { return "" } func (t *mockTxn) LockKeys(_ context.Context, _ *LockCtx, _ ...Key) error { return nil } func (t *mockTxn) SetOption(opt Option, val interface{}) { t.opts[opt] = val } func (t *mockTxn) DelOption(opt Option) { delete(t.opts, opt) } func (t *mockTxn) GetOption(opt Option) interface{} { return t.opts[opt] } func (t *mockTxn) IsReadOnly() bool { return true } func (t *mockTxn) StartTS() uint64 { return uint64(0) } func (t *mockTxn) Get(ctx context.Context, k Key) ([]byte, error) { return nil, nil } func (t *mockTxn) BatchGet(ctx context.Context, keys []Key) (map[string][]byte, error) { return nil, nil } func (t *mockTxn) Iter(k Key, upperBound Key) (Iterator, error) { return nil, nil } func (t *mockTxn) IterReverse(k Key) (Iterator, error) { return nil, nil } func (t *mockTxn) Set(k Key, v []byte) error { return nil } func (t *mockTxn) Delete(k Key) error { return nil } func (t *mockTxn) Valid() bool { return t.valid } func (t *mockTxn) Len() int { return 0 } func (t *mockTxn) Size() int { return 0 } func (t *mockTxn) GetMemBuffer() MemBuffer { return nil } func (t *mockTxn) GetMemBufferSnapshot() MemBuffer { return nil } func (t *mockTxn) GetSnapshot() Snapshot { return nil } func (t *mockTxn) NewStagingBuffer() MemBuffer { return nil } func (t *mockTxn) Flush() (int, error) { return 0, nil } func (t *mockTxn) Discard() { } func (t *mockTxn) Reset() { t.valid = false } func (t *mockTxn) SetVars(vars *Variables) { } func (t *mockTxn) GetVars() *Variables { return nil } func (t *mockTxn) ResetStmtKeyExistErrs() { } func (t *mockTxn) MergeStmtKeyExistErrs() { } func (t *mockTxn) DeleteWithNeedLock(k Key) error { return t.Delete(k) } func (t *mockTxn) GetFlags(ctx context.Context, k Key) memdb.KeyFlags { return 0 } // NewMockTxn new a mockTxn. func NewMockTxn() Transaction { return &mockTxn{ opts: make(map[Option]interface{}), valid: true, } } // mockStorage is used to start a must commit-failed txn. type mockStorage struct { } func (s *mockStorage) Begin() (Transaction, error) { return NewMockTxn(), nil } func (*mockTxn) IsPessimistic() bool { return false } // BeginWithStartTS begins a transaction with startTS. func (s *mockStorage) BeginWithStartTS(startTS uint64) (Transaction, error) { return s.Begin() } func (s *mockStorage) GetSnapshot(ver Version) (Snapshot, error) { return &mockSnapshot{ store: NewMemDbBuffer(), }, nil } func (s *mockStorage) Close() error { return nil } func (s *mockStorage) UUID() string { return "" } // CurrentVersion returns current max committed version. func (s *mockStorage) CurrentVersion() (Version, error) { return NewVersion(1), nil } func (s *mockStorage) GetClient() Client { return nil } func (s *mockStorage) GetOracle() oracle.Oracle { return nil } func (s *mockStorage) SupportDeleteRange() (supported bool) { return false } func (s *mockStorage) Name() string { return "KVMockStorage" } func (s *mockStorage) Describe() string { return "KVMockStorage is a mock Store implementation, only for unittests in KV package" } func (s *mockStorage) ShowStatus(ctx context.Context, key string) (interface{}, error) { return nil, nil } // MockTxn is used for test cases that need more interfaces than Transaction. type MockTxn interface { Transaction GetOption(opt Option) interface{} } // NewMockStorage creates a new mockStorage. func NewMockStorage() Storage { return &mockStorage{} } type mockSnapshot struct { store MemBuffer } func (s *mockSnapshot) Get(ctx context.Context, k Key) ([]byte, error) { return s.store.Get(ctx, k) } func (s *mockSnapshot) SetPriority(priority int) { } func (s *mockSnapshot) BatchGet(ctx context.Context, keys []Key) (map[string][]byte, error) { m := make(map[string][]byte, len(keys)) for _, k := range keys { v, err := s.store.Get(ctx, k) if IsErrNotFound(err) { continue } if err != nil { return nil, err } m[string(k)] = v } return m, nil } func (s *mockSnapshot) Iter(k Key, upperBound Key) (Iterator, error) { return s.store.Iter(k, upperBound) } func (s *mockSnapshot) IterReverse(k Key) (Iterator, error) { return s.store.IterReverse(k) } func (s *mockSnapshot) SetOption(opt Option, val interface{}) {} func (s *mockSnapshot) DelOption(opt Option) {}