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