mirror of https://github.com/poanetwork/gecko.git
100 lines
2.3 KiB
Go
100 lines
2.3 KiB
Go
package avalanche
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import (
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"testing"
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"github.com/ava-labs/gecko/ids"
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)
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func TestPollTerminatesEarlyVirtuousCase(t *testing.T) {
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alpha := 3
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vtxID := GenerateID()
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votes := []ids.ID{vtxID}
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vdr1 := ids.NewShortID([20]byte{1})
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vdr2 := ids.NewShortID([20]byte{2})
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vdr3 := ids.NewShortID([20]byte{3})
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vdr4 := ids.NewShortID([20]byte{4})
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vdr5 := ids.NewShortID([20]byte{5}) // k = 5
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vdrs := ids.ShortSet{}
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vdrs.Add(vdr1)
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vdrs.Add(vdr2)
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vdrs.Add(vdr3)
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vdrs.Add(vdr4)
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vdrs.Add(vdr5)
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poll := poll{
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votes: make(ids.UniqueBag),
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polled: vdrs,
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alpha: alpha,
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}
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poll.Vote(votes, vdr1)
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if poll.Finished() {
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t.Fatalf("Poll finished after less than alpha votes")
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}
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poll.Vote(votes, vdr2)
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if poll.Finished() {
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t.Fatalf("Poll finished after less than alpha votes")
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}
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poll.Vote(votes, vdr3)
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if !poll.Finished() {
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t.Fatalf("Poll did not terminate early after receiving alpha votes for one vertex and none for other vertices")
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}
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}
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func TestPollAccountsForSharedAncestor(t *testing.T) {
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alpha := 4
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vtxA := GenerateID()
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vtxB := GenerateID()
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vtxC := GenerateID()
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vtxD := GenerateID()
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// If validators 1-3 vote for frontier vertices
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// B, C, and D respectively, which all share the common ancestor
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// A, then we cannot terminate early with alpha = k = 4
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// If the final vote is cast for any of A, B, C, or D, then
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// vertex A will have transitively received alpha = 4 votes
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vdr1 := ids.NewShortID([20]byte{1})
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vdr2 := ids.NewShortID([20]byte{2})
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vdr3 := ids.NewShortID([20]byte{3})
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vdr4 := ids.NewShortID([20]byte{4})
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vdrs := ids.ShortSet{}
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vdrs.Add(vdr1)
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vdrs.Add(vdr2)
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vdrs.Add(vdr3)
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vdrs.Add(vdr4)
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poll := poll{
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votes: make(ids.UniqueBag),
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polled: vdrs,
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alpha: alpha,
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}
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votes1 := []ids.ID{vtxB}
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poll.Vote(votes1, vdr1)
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if poll.Finished() {
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t.Fatalf("Poll finished early after receiving one vote")
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}
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votes2 := []ids.ID{vtxC}
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poll.Vote(votes2, vdr2)
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if poll.Finished() {
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t.Fatalf("Poll finished early after receiving two votes")
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}
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votes3 := []ids.ID{vtxD}
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poll.Vote(votes3, vdr3)
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if poll.Finished() {
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t.Fatalf("Poll terminated early, when a shared ancestor could have received alpha votes")
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}
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votes4 := []ids.ID{vtxA}
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poll.Vote(votes4, vdr4)
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if !poll.Finished() {
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t.Fatalf("Poll did not terminate after receiving all outstanding votes")
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}
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}
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