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sync_manager_test.go
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sync_manager_test.go
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package chain
import (
"context"
"fmt"
"testing"
"time"
"github.com/filecoin-project/lotus/chain/types"
"github.com/filecoin-project/lotus/chain/types/mock"
)
var genTs = mock.TipSet(mock.MkBlock(nil, 0, 0))
type syncOp struct {
ts *types.TipSet
done func()
}
func runSyncMgrTest(t *testing.T, tname string, thresh int, tf func(*testing.T, *SyncManager, chan *syncOp)) {
syncTargets := make(chan *syncOp)
sm := NewSyncManager(func(ctx context.Context, ts *types.TipSet) error {
ch := make(chan struct{})
syncTargets <- &syncOp{
ts: ts,
done: func() { close(ch) },
}
<-ch
return nil
})
sm.bspThresh = thresh
sm.Start()
defer sm.Stop()
t.Run(tname+fmt.Sprintf("-%d", thresh), func(t *testing.T) {
tf(t, sm, syncTargets)
})
}
func assertTsEqual(t *testing.T, actual, expected *types.TipSet) {
t.Helper()
if !actual.Equals(expected) {
t.Fatalf("got unexpected tipset %s (expected: %s)", actual.Cids(), expected.Cids())
}
}
func assertNoOp(t *testing.T, c chan *syncOp) {
t.Helper()
select {
case <-time.After(time.Millisecond * 20):
case <-c:
t.Fatal("shouldnt have gotten any sync operations yet")
}
}
func assertGetSyncOp(t *testing.T, c chan *syncOp, ts *types.TipSet) {
t.Helper()
select {
case <-time.After(time.Millisecond * 100):
t.Fatal("expected sync manager to try and sync to our target")
case op := <-c:
op.done()
if !op.ts.Equals(ts) {
t.Fatalf("somehow got wrong tipset from syncer (got %s, expected %s)", op.ts.Cids(), ts.Cids())
}
}
}
func TestSyncManager(t *testing.T) {
ctx := context.Background()
a := mock.TipSet(mock.MkBlock(genTs, 1, 1))
b := mock.TipSet(mock.MkBlock(a, 1, 2))
c1 := mock.TipSet(mock.MkBlock(b, 1, 3))
c2 := mock.TipSet(mock.MkBlock(b, 2, 4))
d := mock.TipSet(mock.MkBlock(c1, 4, 5))
runSyncMgrTest(t, "testBootstrap", 1, func(t *testing.T, sm *SyncManager, stc chan *syncOp) {
sm.SetPeerHead(ctx, "peer1", c1)
assertGetSyncOp(t, stc, c1)
})
runSyncMgrTest(t, "testBootstrap", 2, func(t *testing.T, sm *SyncManager, stc chan *syncOp) {
sm.SetPeerHead(ctx, "peer1", c1)
assertNoOp(t, stc)
sm.SetPeerHead(ctx, "peer2", c1)
assertGetSyncOp(t, stc, c1)
})
runSyncMgrTest(t, "testSyncAfterBootstrap", 1, func(t *testing.T, sm *SyncManager, stc chan *syncOp) {
sm.SetPeerHead(ctx, "peer1", b)
assertGetSyncOp(t, stc, b)
sm.SetPeerHead(ctx, "peer2", c1)
assertGetSyncOp(t, stc, c1)
sm.SetPeerHead(ctx, "peer2", c2)
assertGetSyncOp(t, stc, c2)
})
runSyncMgrTest(t, "testCoalescing", 1, func(t *testing.T, sm *SyncManager, stc chan *syncOp) {
sm.SetPeerHead(ctx, "peer1", a)
assertGetSyncOp(t, stc, a)
sm.SetPeerHead(ctx, "peer2", b)
op := <-stc
sm.SetPeerHead(ctx, "peer2", c1)
sm.SetPeerHead(ctx, "peer2", c2)
sm.SetPeerHead(ctx, "peer2", d)
assertTsEqual(t, op.ts, b)
// need a better way to 'wait until syncmgr is idle'
time.Sleep(time.Millisecond * 20)
op.done()
assertGetSyncOp(t, stc, d)
})
}