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// Copyright 2018 The dexon-consensus Authors
// This file is part of the dexon-consensus library.
//
// The dexon-consensus library is free software: you can redistribute it
// and/or modify it under the terms of the GNU Lesser General Public License as
// published by the Free Software Foundation, either version 3 of the License,
// or (at your option) any later version.
//
// The dexon-consensus library is distributed in the hope that it will be
// useful, but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU Lesser
// General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with the dexon-consensus library. If not, see
// <http://www.gnu.org/licenses/>.
package test
import (
"testing"
"github.com/dexon-foundation/dexon-consensus/common"
"github.com/dexon-foundation/dexon-consensus/core/db"
"github.com/dexon-foundation/dexon-consensus/core/types"
"github.com/stretchr/testify/suite"
)
type BlockRevealerTestSuite struct {
suite.Suite
}
func (s *BlockRevealerTestSuite) TestBlockRevealByPosition() {
dbInst, err := db.NewMemBackedDB()
s.Require().NoError(err)
// Put several blocks with position field ready.
b1 := &types.Block{
Hash: common.NewRandomHash(),
Position: types.Position{Height: 1},
}
b2 := &types.Block{
Hash: common.NewRandomHash(),
Position: types.Position{Height: 2},
}
b3 := &types.Block{
Hash: common.NewRandomHash(),
Position: types.Position{Height: 3},
}
s.Require().NoError(dbInst.PutBlock(*b1))
s.Require().NoError(dbInst.PutBlock(*b3))
iter, err := dbInst.GetAllBlocks()
s.Require().NoError(err)
// The compaction chain is not complete, we can't construct a revealer
// instance successfully.
r, err := NewBlockRevealerByPosition(iter, 0)
s.Require().Nil(r)
s.Require().Equal(ErrNotValidCompactionChain.Error(), err.Error())
// Put a block to make the compaction chain complete.
s.Require().NoError(dbInst.PutBlock(*b2))
// We can construct that revealer now.
iter, err = dbInst.GetAllBlocks()
s.Require().NoError(err)
r, err = NewBlockRevealerByPosition(iter, 0)
s.Require().NotNil(r)
s.Require().NoError(err)
// The revealing order should be ok.
chk := func(h uint64) {
b, err := r.NextBlock()
s.Require().NoError(err)
s.Require().Equal(b.Position.Height, h)
}
chk(1)
chk(2)
chk(3)
// Iteration should be finished
_, err = r.NextBlock()
s.Require().Equal(db.ErrIterationFinished.Error(), err.Error())
// Test 'startHeight' parameter.
iter, err = dbInst.GetAllBlocks()
s.Require().NoError(err)
r, err = NewBlockRevealerByPosition(iter, 2)
s.Require().NotNil(r)
s.Require().NoError(err)
chk(2)
chk(3)
}
func TestBlockRevealer(t *testing.T) {
suite.Run(t, new(BlockRevealerTestSuite))
}
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