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// Copyright (C) 2019-2021 Algorand, Inc.
// This file is part of go-algorand
//
// go-algorand is free software: you can redistribute it and/or modify
// it under the terms of the GNU Affero General Public License as
// published by the Free Software Foundation, either version 3 of the
// License, or (at your option) any later version.
//
// go-algorand 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 Affero General Public License for more details.
//
// You should have received a copy of the GNU Affero General Public License
// along with go-algorand. If not, see <https://www.gnu.org/licenses/>.
package txnsync
import (
"fmt"
"testing"
"time"
"github.com/stretchr/testify/require"
"github.com/algorand/go-algorand/test/partitiontest"
)
func TestBeta(t *testing.T) {
partitiontest.PartitionTest(t)
beta0 := beta(0)
beta10000 := beta(10000)
require.GreaterOrEqual(t, int64(beta0), int64(100*time.Millisecond))
require.LessOrEqual(t, int64(beta10000), int64(20*time.Millisecond))
for i := 50; i < 20000; i += 50 {
prev := beta(i - 50)
cur := beta(i)
require.LessOrEqualf(t, int64(cur), int64(prev), fmt.Sprintf("beta(%d) < beta(%d)", i, i-50))
}
}
func TestShouldUpdateBeta(t *testing.T) {
partitiontest.PartitionTest(t)
beta0 := beta(0)
beta100 := beta(100)
beta5000 := beta(5000)
beta5100 := beta(5100)
beta5900 := beta(5900)
beta6000 := beta(6000)
beta10000 := beta(10000)
beta15000 := beta(15000)
// new beta greater than betaGranularChangeThreshold times previous beta
require.True(t, shouldUpdateBeta(beta0, beta10000, betaGranularChangeThreshold))
require.True(t, shouldUpdateBeta(beta5000, beta6000, betaGranularChangeThreshold))
//same beta values
require.False(t, shouldUpdateBeta(beta0, beta100, betaGranularChangeThreshold))
require.False(t, shouldUpdateBeta(beta10000, beta15000, betaGranularChangeThreshold))
// new beta lesser than betaGranularChangeThreshold times previous beta
require.True(t, shouldUpdateBeta(beta15000, beta0, betaGranularChangeThreshold))
require.True(t, shouldUpdateBeta(beta6000, beta100, betaGranularChangeThreshold))
// no change in beta is expected
require.False(t, shouldUpdateBeta(beta5000, beta5100, betaGranularChangeThreshold))
require.False(t, shouldUpdateBeta(beta6000, beta5900, betaGranularChangeThreshold))
}
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