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// Copyright 2017 Canonical Ltd.
//
// 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,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.
package rafttest
import (
"io"
"github.com/hashicorp/raft"
)
// FSM create a dummy FSMs.
func FSM() raft.FSM {
return &fsm{}
}
// FSMs creates the given number of dummy FSMs.
func FSMs(n int) []raft.FSM {
fsms := make([]raft.FSM, n)
for i := range fsms {
fsms[i] = FSM()
}
return fsms
}
// fsm is a dummy raft finite state machine that does nothing and
// always no-ops.
type fsm struct{}
// Apply always return a nil error without doing anything.
func (f *fsm) Apply(*raft.Log) interface{} { return nil }
// Snapshot always return a dummy snapshot and no error without doing
// anything.
func (f *fsm) Snapshot() (raft.FSMSnapshot, error) { return &fsmSnapshot{}, nil }
// Restore always return a nil error without reading anything from
// the reader.
func (f *fsm) Restore(io.ReadCloser) error { return nil }
// fsmSnapshot a dummy implementation of an fsm snapshot.
type fsmSnapshot struct{}
// Persist always return a nil error without writing anything
// to the sink.
func (s *fsmSnapshot) Persist(sink raft.SnapshotSink) error { return nil }
// Release is a no-op.
func (s *fsmSnapshot) Release() {}
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