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151 lines
3.8 KiB
151 lines
3.8 KiB
package p2p
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import (
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"math/rand"
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"sync"
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"testing"
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"github.com/stretchr/testify/assert"
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cmn "github.com/tendermint/tmlibs/common"
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)
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// Returns an empty dummy peer
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func randPeer() *peer {
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return &peer{
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key: cmn.RandStr(12),
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nodeInfo: &NodeInfo{
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RemoteAddr: cmn.Fmt("%v.%v.%v.%v:46656", rand.Int()%256, rand.Int()%256, rand.Int()%256, rand.Int()%256),
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ListenAddr: cmn.Fmt("%v.%v.%v.%v:46656", rand.Int()%256, rand.Int()%256, rand.Int()%256, rand.Int()%256),
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},
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}
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}
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func TestPeerSetAddRemoveOne(t *testing.T) {
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t.Parallel()
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peerSet := NewPeerSet()
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var peerList []Peer
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for i := 0; i < 5; i++ {
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p := randPeer()
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if err := peerSet.Add(p); err != nil {
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t.Error(err)
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}
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peerList = append(peerList, p)
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}
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n := len(peerList)
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// 1. Test removing from the front
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for i, peerAtFront := range peerList {
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peerSet.Remove(peerAtFront)
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wantSize := n - i - 1
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for j := 0; j < 2; j++ {
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assert.Equal(t, false, peerSet.Has(peerAtFront.Key()), "#%d Run #%d: failed to remove peer", i, j)
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assert.Equal(t, wantSize, peerSet.Size(), "#%d Run #%d: failed to remove peer and decrement size", i, j)
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// Test the route of removing the now non-existent element
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peerSet.Remove(peerAtFront)
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}
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}
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// 2. Next we are testing removing the peer at the end
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// a) Replenish the peerSet
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for _, peer := range peerList {
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if err := peerSet.Add(peer); err != nil {
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t.Error(err)
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}
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}
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// b) In reverse, remove each element
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for i := n - 1; i >= 0; i-- {
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peerAtEnd := peerList[i]
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peerSet.Remove(peerAtEnd)
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assert.Equal(t, false, peerSet.Has(peerAtEnd.Key()), "#%d: failed to remove item at end", i)
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assert.Equal(t, i, peerSet.Size(), "#%d: differing sizes after peerSet.Remove(atEndPeer)", i)
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}
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}
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func TestPeerSetAddRemoveMany(t *testing.T) {
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t.Parallel()
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peerSet := NewPeerSet()
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peers := []Peer{}
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N := 100
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for i := 0; i < N; i++ {
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peer := randPeer()
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if err := peerSet.Add(peer); err != nil {
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t.Errorf("Failed to add new peer")
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}
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if peerSet.Size() != i+1 {
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t.Errorf("Failed to add new peer and increment size")
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}
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peers = append(peers, peer)
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}
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for i, peer := range peers {
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peerSet.Remove(peer)
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if peerSet.Has(peer.Key()) {
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t.Errorf("Failed to remove peer")
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}
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if peerSet.Size() != len(peers)-i-1 {
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t.Errorf("Failed to remove peer and decrement size")
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}
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}
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}
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func TestPeerSetAddDuplicate(t *testing.T) {
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t.Parallel()
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peerSet := NewPeerSet()
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peer := randPeer()
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n := 20
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errsChan := make(chan error)
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// Add the same asynchronously to test the
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// concurrent guarantees of our APIs, and
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// our expectation in the end is that only
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// one addition succeeded, but the rest are
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// instances of ErrSwitchDuplicatePeer.
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for i := 0; i < n; i++ {
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go func() {
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errsChan <- peerSet.Add(peer)
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}()
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}
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// Now collect and tally the results
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errsTally := make(map[error]int)
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for i := 0; i < n; i++ {
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err := <-errsChan
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errsTally[err] += 1
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}
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// Our next procedure is to ensure that only one addition
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// succeeded and that the rest are each ErrSwitchDuplicatePeer.
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wantErrCount, gotErrCount := n-1, errsTally[ErrSwitchDuplicatePeer]
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assert.Equal(t, wantErrCount, gotErrCount, "invalid ErrSwitchDuplicatePeer count")
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wantNilErrCount, gotNilErrCount := 1, errsTally[nil]
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assert.Equal(t, wantNilErrCount, gotNilErrCount, "invalid nil errCount")
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}
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func TestPeerSetGet(t *testing.T) {
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t.Parallel()
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peerSet := NewPeerSet()
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peer := randPeer()
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assert.Nil(t, peerSet.Get(peer.Key()), "expecting a nil lookup, before .Add")
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if err := peerSet.Add(peer); err != nil {
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t.Fatalf("Failed to add new peer: %v", err)
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}
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var wg sync.WaitGroup
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for i := 0; i < 10; i++ {
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// Add them asynchronously to test the
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// concurrent guarantees of our APIs.
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wg.Add(1)
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go func(i int) {
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defer wg.Done()
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got, want := peerSet.Get(peer.Key()), peer
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assert.Equal(t, got, want, "#%d: got=%v want=%v", i, got, want)
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}(i)
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}
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wg.Wait()
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}
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