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test_engine.go
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test_engine.go
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// Copyright (C) 2019-2023, Ava Labs, Inc. All rights reserved.
// See the file LICENSE for licensing terms.
package snowman
import (
"context"
"errors"
"github.com/stretchr/testify/require"
"github.com/ava-labs/avalanchego/ids"
"github.com/ava-labs/avalanchego/snow/consensus/snowman"
"github.com/ava-labs/avalanchego/snow/engine/common"
)
var (
_ Engine = (*EngineTest)(nil)
errGetBlock = errors.New("unexpectedly called GetBlock")
)
// EngineTest is a test engine
type EngineTest struct {
common.EngineTest
CantGetBlock bool
GetBlockF func(context.Context, ids.ID) (snowman.Block, error)
}
func (e *EngineTest) Default(cant bool) {
e.EngineTest.Default(cant)
e.CantGetBlock = false
}
func (e *EngineTest) GetBlock(ctx context.Context, blkID ids.ID) (snowman.Block, error) {
if e.GetBlockF != nil {
return e.GetBlockF(ctx, blkID)
}
if e.CantGetBlock && e.T != nil {
require.FailNow(e.T, errGetBlock.Error())
}
return nil, errGetBlock
}