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327 lines
9.2 KiB
327 lines
9.2 KiB
package statesync
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import (
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"testing"
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"github.com/stretchr/testify/mock"
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"github.com/stretchr/testify/require"
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"github.com/tendermint/tendermint/p2p"
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"github.com/tendermint/tendermint/statesync/mocks"
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)
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func TestSnapshot_Key(t *testing.T) {
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testcases := map[string]struct {
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modify func(*snapshot)
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}{
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"new height": {func(s *snapshot) { s.Height = 9 }},
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"new format": {func(s *snapshot) { s.Format = 9 }},
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"new chunk count": {func(s *snapshot) { s.Chunks = 9 }},
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"new hash": {func(s *snapshot) { s.Hash = []byte{9} }},
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"no metadata": {func(s *snapshot) { s.Metadata = nil }},
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}
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for name, tc := range testcases {
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tc := tc
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t.Run(name, func(t *testing.T) {
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s := snapshot{
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Height: 3,
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Format: 1,
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Chunks: 7,
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Hash: []byte{1, 2, 3},
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Metadata: []byte{255},
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}
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before := s.Key()
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tc.modify(&s)
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after := s.Key()
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require.NotEqual(t, before, after)
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})
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}
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}
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func TestSnapshotPool_Add(t *testing.T) {
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stateProvider := &mocks.StateProvider{}
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stateProvider.On("AppHash", mock.Anything, uint64(1)).Return([]byte("app_hash"), nil)
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peerID := p2p.PeerID{0xAA}
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// Adding to the pool should work
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pool := newSnapshotPool(stateProvider)
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added, err := pool.Add(peerID, &snapshot{
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Height: 1,
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Format: 1,
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Chunks: 1,
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Hash: []byte{1},
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})
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require.NoError(t, err)
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require.True(t, added)
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// Adding again from a different peer should return false
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otherPeerID := p2p.PeerID{0xBB}
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added, err = pool.Add(otherPeerID, &snapshot{
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Height: 1,
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Format: 1,
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Chunks: 1,
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Hash: []byte{1},
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})
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require.NoError(t, err)
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require.False(t, added)
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// The pool should have populated the snapshot with the trusted app hash
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snapshot := pool.Best()
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require.NotNil(t, snapshot)
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require.Equal(t, []byte("app_hash"), snapshot.trustedAppHash)
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stateProvider.AssertExpectations(t)
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}
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func TestSnapshotPool_GetPeer(t *testing.T) {
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stateProvider := &mocks.StateProvider{}
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stateProvider.On("AppHash", mock.Anything, mock.Anything).Return([]byte("app_hash"), nil)
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pool := newSnapshotPool(stateProvider)
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s := &snapshot{Height: 1, Format: 1, Chunks: 1, Hash: []byte{1}}
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peerAID := p2p.PeerID{0xAA}
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peerBID := p2p.PeerID{0xBB}
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_, err := pool.Add(peerAID, s)
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require.NoError(t, err)
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_, err = pool.Add(peerBID, s)
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require.NoError(t, err)
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_, err = pool.Add(peerAID, &snapshot{Height: 2, Format: 1, Chunks: 1, Hash: []byte{1}})
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require.NoError(t, err)
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// GetPeer currently picks a random peer, so lets run it until we've seen both.
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seenA := false
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seenB := false
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for !seenA || !seenB {
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peer := pool.GetPeer(s)
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if peer.Equal(peerAID) {
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seenA = true
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}
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if peer.Equal(peerBID) {
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seenB = true
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}
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}
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// GetPeer should return nil for an unknown snapshot
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peer := pool.GetPeer(&snapshot{Height: 9, Format: 9})
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require.Nil(t, peer)
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}
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func TestSnapshotPool_GetPeers(t *testing.T) {
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stateProvider := &mocks.StateProvider{}
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stateProvider.On("AppHash", mock.Anything, mock.Anything).Return([]byte("app_hash"), nil)
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pool := newSnapshotPool(stateProvider)
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s := &snapshot{Height: 1, Format: 1, Chunks: 1, Hash: []byte{1}}
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peerAID := p2p.PeerID{0xAA}
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peerBID := p2p.PeerID{0xBB}
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_, err := pool.Add(peerAID, s)
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require.NoError(t, err)
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_, err = pool.Add(peerBID, s)
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require.NoError(t, err)
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_, err = pool.Add(peerAID, &snapshot{Height: 2, Format: 1, Chunks: 1, Hash: []byte{2}})
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require.NoError(t, err)
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peers := pool.GetPeers(s)
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require.Len(t, peers, 2)
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require.Equal(t, peerAID, peers[0])
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require.EqualValues(t, peerBID, peers[1])
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}
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func TestSnapshotPool_Ranked_Best(t *testing.T) {
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stateProvider := &mocks.StateProvider{}
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stateProvider.On("AppHash", mock.Anything, mock.Anything).Return([]byte("app_hash"), nil)
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pool := newSnapshotPool(stateProvider)
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// snapshots in expected order (best to worst). Highest height wins, then highest format.
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// Snapshots with different chunk hashes are considered different, and the most peers is
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// tie-breaker.
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expectSnapshots := []struct {
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snapshot *snapshot
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peers []string
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}{
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{&snapshot{Height: 2, Format: 2, Chunks: 4, Hash: []byte{1, 3}}, []string{"AA", "BB", "CC"}},
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{&snapshot{Height: 2, Format: 2, Chunks: 5, Hash: []byte{1, 2}}, []string{"AA"}},
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{&snapshot{Height: 2, Format: 1, Chunks: 3, Hash: []byte{1, 2}}, []string{"AA", "BB"}},
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{&snapshot{Height: 1, Format: 2, Chunks: 5, Hash: []byte{1, 2}}, []string{"AA", "BB"}},
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{&snapshot{Height: 1, Format: 1, Chunks: 4, Hash: []byte{1, 2}}, []string{"AA", "BB", "CC"}},
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}
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// Add snapshots in reverse order, to make sure the pool enforces some order.
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for i := len(expectSnapshots) - 1; i >= 0; i-- {
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for _, peerIDStr := range expectSnapshots[i].peers {
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peerID, err := p2p.PeerIDFromString(peerIDStr)
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require.NoError(t, err)
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_, err = pool.Add(peerID, expectSnapshots[i].snapshot)
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require.NoError(t, err)
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}
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}
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// Ranked should return the snapshots in the same order
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ranked := pool.Ranked()
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require.Len(t, ranked, len(expectSnapshots))
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for i := range ranked {
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require.Equal(t, expectSnapshots[i].snapshot, ranked[i])
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}
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// Check that best snapshots are returned in expected order
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for i := range expectSnapshots {
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snapshot := expectSnapshots[i].snapshot
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require.Equal(t, snapshot, pool.Best())
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pool.Reject(snapshot)
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}
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require.Nil(t, pool.Best())
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}
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func TestSnapshotPool_Reject(t *testing.T) {
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stateProvider := &mocks.StateProvider{}
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stateProvider.On("AppHash", mock.Anything, mock.Anything).Return([]byte("app_hash"), nil)
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pool := newSnapshotPool(stateProvider)
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peerID := p2p.PeerID{0xAA}
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snapshots := []*snapshot{
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{Height: 2, Format: 2, Chunks: 1, Hash: []byte{1, 2}},
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{Height: 2, Format: 1, Chunks: 1, Hash: []byte{1, 2}},
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{Height: 1, Format: 2, Chunks: 1, Hash: []byte{1, 2}},
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{Height: 1, Format: 1, Chunks: 1, Hash: []byte{1, 2}},
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}
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for _, s := range snapshots {
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_, err := pool.Add(peerID, s)
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require.NoError(t, err)
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}
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pool.Reject(snapshots[0])
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require.Equal(t, snapshots[1:], pool.Ranked())
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added, err := pool.Add(peerID, snapshots[0])
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require.NoError(t, err)
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require.False(t, added)
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added, err = pool.Add(peerID, &snapshot{Height: 3, Format: 3, Chunks: 1, Hash: []byte{1}})
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require.NoError(t, err)
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require.True(t, added)
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}
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func TestSnapshotPool_RejectFormat(t *testing.T) {
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stateProvider := &mocks.StateProvider{}
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stateProvider.On("AppHash", mock.Anything, mock.Anything).Return([]byte("app_hash"), nil)
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pool := newSnapshotPool(stateProvider)
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peerID := p2p.PeerID{0xAA}
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snapshots := []*snapshot{
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{Height: 2, Format: 2, Chunks: 1, Hash: []byte{1, 2}},
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{Height: 2, Format: 1, Chunks: 1, Hash: []byte{1, 2}},
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{Height: 1, Format: 2, Chunks: 1, Hash: []byte{1, 2}},
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{Height: 1, Format: 1, Chunks: 1, Hash: []byte{1, 2}},
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}
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for _, s := range snapshots {
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_, err := pool.Add(peerID, s)
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require.NoError(t, err)
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}
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pool.RejectFormat(1)
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require.Equal(t, []*snapshot{snapshots[0], snapshots[2]}, pool.Ranked())
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added, err := pool.Add(peerID, &snapshot{Height: 3, Format: 1, Chunks: 1, Hash: []byte{1}})
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require.NoError(t, err)
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require.False(t, added)
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require.Equal(t, []*snapshot{snapshots[0], snapshots[2]}, pool.Ranked())
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added, err = pool.Add(peerID, &snapshot{Height: 3, Format: 3, Chunks: 1, Hash: []byte{1}})
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require.NoError(t, err)
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require.True(t, added)
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}
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func TestSnapshotPool_RejectPeer(t *testing.T) {
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stateProvider := &mocks.StateProvider{}
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stateProvider.On("AppHash", mock.Anything, mock.Anything).Return([]byte("app_hash"), nil)
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pool := newSnapshotPool(stateProvider)
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peerAID := p2p.PeerID{0xAA}
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peerBID := p2p.PeerID{0xBB}
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s1 := &snapshot{Height: 1, Format: 1, Chunks: 1, Hash: []byte{1}}
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s2 := &snapshot{Height: 2, Format: 1, Chunks: 1, Hash: []byte{2}}
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s3 := &snapshot{Height: 3, Format: 1, Chunks: 1, Hash: []byte{2}}
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_, err := pool.Add(peerAID, s1)
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require.NoError(t, err)
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_, err = pool.Add(peerAID, s2)
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require.NoError(t, err)
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_, err = pool.Add(peerBID, s2)
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require.NoError(t, err)
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_, err = pool.Add(peerBID, s3)
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require.NoError(t, err)
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pool.RejectPeer(peerAID)
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require.Empty(t, pool.GetPeers(s1))
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peers2 := pool.GetPeers(s2)
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require.Len(t, peers2, 1)
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require.Equal(t, peerBID, peers2[0])
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peers3 := pool.GetPeers(s2)
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require.Len(t, peers3, 1)
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require.Equal(t, peerBID, peers3[0])
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// it should no longer be possible to add the peer back
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_, err = pool.Add(peerAID, s1)
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require.NoError(t, err)
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require.Empty(t, pool.GetPeers(s1))
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}
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func TestSnapshotPool_RemovePeer(t *testing.T) {
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stateProvider := &mocks.StateProvider{}
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stateProvider.On("AppHash", mock.Anything, mock.Anything).Return([]byte("app_hash"), nil)
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pool := newSnapshotPool(stateProvider)
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peerAID := p2p.PeerID{0xAA}
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peerBID := p2p.PeerID{0xBB}
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s1 := &snapshot{Height: 1, Format: 1, Chunks: 1, Hash: []byte{1}}
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s2 := &snapshot{Height: 2, Format: 1, Chunks: 1, Hash: []byte{2}}
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_, err := pool.Add(peerAID, s1)
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require.NoError(t, err)
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_, err = pool.Add(peerAID, s2)
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require.NoError(t, err)
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_, err = pool.Add(peerBID, s1)
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require.NoError(t, err)
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pool.RemovePeer(peerAID)
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peers1 := pool.GetPeers(s1)
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require.Len(t, peers1, 1)
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require.Equal(t, peerBID, peers1[0])
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peers2 := pool.GetPeers(s2)
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require.Empty(t, peers2)
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// it should still be possible to add the peer back
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_, err = pool.Add(peerAID, s1)
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require.NoError(t, err)
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peers1 = pool.GetPeers(s1)
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require.Len(t, peers1, 2)
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require.Equal(t, peerAID, peers1[0])
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require.Equal(t, peerBID, peers1[1])
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}
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