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// Copyright 2017 Tendermint. All rights reserved.
// Use of this source code is governed by Apache 2 LICENSE that can be found in the LICENSE file.
package trust
import (
"fmt"
"io/ioutil"
"os"
"testing"
"github.com/stretchr/testify/assert"
"github.com/tendermint/tendermint/libs/log"
dbm "github.com/tendermint/tm-cmn/db"
)
func TestTrustMetricStoreSaveLoad(t *testing.T) {
dir, err := ioutil.TempDir("", "trust_test")
if err != nil {
panic(err)
}
defer os.Remove(dir)
historyDB := dbm.NewDB("trusthistory", "goleveldb", dir)
// 0 peers saved
store := NewTrustMetricStore(historyDB, DefaultConfig())
store.SetLogger(log.TestingLogger())
store.saveToDB()
// Load the data from the file
store = NewTrustMetricStore(historyDB, DefaultConfig())
store.SetLogger(log.TestingLogger())
store.Start()
// Make sure we still have 0 entries
assert.Zero(t, store.Size())
// 100 TestTickers
var tt []*TestTicker
for i := 0; i < 100; i++ {
// The TestTicker will provide manual control over
// the passing of time within the metric
tt = append(tt, NewTestTicker())
}
// 100 peers
for i := 0; i < 100; i++ {
key := fmt.Sprintf("peer_%d", i)
tm := NewMetric()
tm.SetTicker(tt[i])
tm.Start()
store.AddPeerTrustMetric(key, tm)
tm.BadEvents(10)
tm.GoodEvents(1)
}
// Check that we have 100 entries and save
assert.Equal(t, 100, store.Size())
// Give the 100 metrics time to process the history data
for i := 0; i < 100; i++ {
tt[i].NextTick()
tt[i].NextTick()
}
// Stop all the trust metrics and save
store.Stop()
// Load the data from the DB
store = NewTrustMetricStore(historyDB, DefaultConfig())
store.SetLogger(log.TestingLogger())
store.Start()
// Check that we still have 100 peers with imperfect trust values
assert.Equal(t, 100, store.Size())
for _, tm := range store.peerMetrics {
assert.NotEqual(t, 1.0, tm.TrustValue())
}
store.Stop()
}
func TestTrustMetricStoreConfig(t *testing.T) {
historyDB := dbm.NewDB("", "memdb", "")
config := TrustMetricConfig{
ProportionalWeight: 0.5,
IntegralWeight: 0.5,
}
// Create a store with custom config
store := NewTrustMetricStore(historyDB, config)
store.SetLogger(log.TestingLogger())
store.Start()
// Have the store make us a metric with the config
tm := store.GetPeerTrustMetric("TestKey")
// Check that the options made it to the metric
assert.Equal(t, 0.5, tm.proportionalWeight)
assert.Equal(t, 0.5, tm.integralWeight)
store.Stop()
}
func TestTrustMetricStoreLookup(t *testing.T) {
historyDB := dbm.NewDB("", "memdb", "")
store := NewTrustMetricStore(historyDB, DefaultConfig())
store.SetLogger(log.TestingLogger())
store.Start()
// Create 100 peers in the trust metric store
for i := 0; i < 100; i++ {
key := fmt.Sprintf("peer_%d", i)
store.GetPeerTrustMetric(key)
// Check that the trust metric was successfully entered
ktm := store.peerMetrics[key]
assert.NotNil(t, ktm, "Expected to find TrustMetric %s but wasn't there.", key)
}
store.Stop()
}
func TestTrustMetricStorePeerScore(t *testing.T) {
historyDB := dbm.NewDB("", "memdb", "")
store := NewTrustMetricStore(historyDB, DefaultConfig())
store.SetLogger(log.TestingLogger())
store.Start()
key := "TestKey"
tm := store.GetPeerTrustMetric(key)
// This peer is innocent so far
first := tm.TrustScore()
assert.Equal(t, 100, first)
// Add some undesirable events and disconnect
tm.BadEvents(1)
first = tm.TrustScore()
assert.NotEqual(t, 100, first)
tm.BadEvents(10)
second := tm.TrustScore()
if second > first {
t.Errorf("A greater number of bad events should lower the trust score")
}
store.PeerDisconnected(key)
// We will remember our experiences with this peer
tm = store.GetPeerTrustMetric(key)
assert.NotEqual(t, 100, tm.TrustScore())
store.Stop()
}