func TestClientHostPort(t *testing.T) {
ctx, cancel := NewContext(time.Second * 10)
defer cancel()
s1ch, err := testutils.NewServer(nil)
require.NoError(t, err, "testutils.NewServer failed")
s2ch, err := testutils.NewServer(nil)
require.NoError(t, err, "testutils.NewServer failed")
defer s1ch.Close()
defer s2ch.Close()
s1ch.Peers().Add(s2ch.PeerInfo().HostPort)
s2ch.Peers().Add(s1ch.PeerInfo().HostPort)
mock1, mock2 := new(mocks.TChanSecondService), new(mocks.TChanSecondService)
NewServer(s1ch).Register(gen.NewTChanSecondServiceServer(mock1))
NewServer(s2ch).Register(gen.NewTChanSecondServiceServer(mock2))
// When we call using a normal client, it can only call the other server (only peer).
c1 := gen.NewTChanSecondServiceClient(NewClient(s1ch, s2ch.PeerInfo().ServiceName, nil))
mock2.On("Echo", ctxArg(), "call1").Return("call1", nil)
res, err := c1.Echo(ctx, "call1")
assert.NoError(t, err, "call1 failed")
assert.Equal(t, "call1", res)
// When we call using a client that specifies host:port, it should call that server.
c2 := gen.NewTChanSecondServiceClient(NewClient(s1ch, s1ch.PeerInfo().ServiceName, &ClientOptions{
HostPort: s1ch.PeerInfo().HostPort,
}))
mock1.On("Echo", ctxArg(), "call2").Return("call2", nil)
res, err = c2.Echo(ctx, "call2")
assert.NoError(t, err, "call2 failed")
assert.Equal(t, "call2", res)
}
func setupServer(b *testing.B) (ch *Channel, svcName, svcHostPort string) {
serverCh, err := testutils.NewServer(nil)
require.Nil(b, err)
handler := &benchmarkHandler{}
serverCh.Register(raw.Wrap(handler), "echo")
peerInfo := serverCh.PeerInfo()
return serverCh, peerInfo.ServiceName, peerInfo.HostPort
}
func TestCloseOnlyListening(t *testing.T) {
ch, err := testutils.NewServer(nil)
require.NoError(t, err, "NewServer failed")
// If there are no connections, then the channel should close immediately.
ch.Close()
assert.Equal(t, ChannelClosed, ch.State())
assert.True(t, ch.Closed(), "Channel should be closed")
}
func TestCloseOneSide(t *testing.T) {
ctx, cancel := NewContext(time.Second)
defer cancel()
ch1, err := testutils.NewServer(&testutils.ChannelOpts{ServiceName: "client"})
ch2, err := testutils.NewServer(&testutils.ChannelOpts{ServiceName: "server"})
require.NoError(t, err, "NewServer 1 failed")
require.NoError(t, err, "NewServer 2 failed")
connected := make(chan struct{})
completed := make(chan struct{})
blockCall := make(chan struct{})
registerFunc(t, ch2, "echo", func(ctx context.Context, args *raw.Args) (*raw.Res, error) {
connected <- struct{}{}
<-blockCall
return &raw.Res{
Arg2: args.Arg2,
Arg3: args.Arg3,
}, nil
})
go func() {
ch2Peer := ch2.PeerInfo()
_, _, _, err := raw.Call(ctx, ch1, ch2Peer.HostPort, ch2Peer.ServiceName, "echo", nil, nil)
assert.NoError(t, err, "Call failed")
completed <- struct{}{}
}()
// Wait for connected before calling Close.
<-connected
ch1.Close()
// Now unblock the call and wait for the call to complete.
close(blockCall)
<-completed
// Once the call completes, the channel should be closed.
runtime.Gosched()
assert.Equal(t, ChannelClosed, ch1.State())
// We need to close all open TChannels before verifying blocked goroutines.
ch2.Close()
VerifyNoBlockedGoroutines(t)
}
// TestCloseSendError tests that system errors are not attempted to be sent when
// a connection is closed, and ensures there's no race conditions such as the error
// frame being added to the channel just as it is closed.
// TODO(prashant): This test is waiting for timeout, but socket close shouldn't wait for timeout.
func TestCloseSendError(t *testing.T) {
ctx, cancel := NewContext(time.Second)
defer cancel()
serverCh, err := testutils.NewServer(nil)
require.NoError(t, err, "NewServer failed")
closed := uint32(0)
counter := uint32(0)
registerFunc(t, serverCh, "echo", func(ctx context.Context, args *raw.Args) (*raw.Res, error) {
atomic.AddUint32(&counter, 1)
return &raw.Res{Arg2: args.Arg2, Arg3: args.Arg3}, nil
})
clientCh, err := testutils.NewClient(nil)
require.NoError(t, err, "NewClient failed")
// Make a call to create a connection that will be shared.
peerInfo := serverCh.PeerInfo()
_, _, _, err = raw.Call(ctx, clientCh, peerInfo.HostPort, peerInfo.ServiceName, "echo", nil, nil)
require.NoError(t, err, "Call should succeed")
var wg sync.WaitGroup
for i := 0; i < 100; i++ {
wg.Add(1)
go func() {
time.Sleep(time.Duration(rand.Intn(1000)) * time.Microsecond)
_, _, _, err := raw.Call(ctx, clientCh, peerInfo.HostPort, peerInfo.ServiceName, "echo", nil, nil)
if err != nil && atomic.LoadUint32(&closed) == 0 {
t.Errorf("Call failed: %v", err)
}
wg.Done()
}()
}
// Wait for the server to have processed some number of these calls.
for {
if atomic.LoadUint32(&counter) >= 10 {
break
}
runtime.Gosched()
}
atomic.AddUint32(&closed, 1)
serverCh.Close()
// Wait for all the goroutines to end
wg.Wait()
clientCh.Close()
VerifyNoBlockedGoroutines(t)
}
func TestCloseSingleChannel(t *testing.T) {
ctx, cancel := NewContext(time.Second)
defer cancel()
ch, err := testutils.NewServer(nil)
require.NoError(t, err, "NewServer failed")
var connected sync.WaitGroup
var completed sync.WaitGroup
blockCall := make(chan struct{})
registerFunc(t, ch, "echo", func(ctx context.Context, args *raw.Args) (*raw.Res, error) {
connected.Done()
<-blockCall
return &raw.Res{
Arg2: args.Arg2,
Arg3: args.Arg3,
}, nil
})
for i := 0; i < 10; i++ {
connected.Add(1)
completed.Add(1)
go func() {
peerInfo := ch.PeerInfo()
_, _, _, err := raw.Call(ctx, ch, peerInfo.HostPort, peerInfo.ServiceName, "echo", nil, nil)
assert.NoError(t, err, "Call failed")
completed.Done()
}()
}
// Wait for all calls to connect before triggerring the Close (so they do not fail).
connected.Wait()
ch.Close()
// Unblock the calls, and wait for all the calls to complete.
close(blockCall)
completed.Wait()
// Once all calls are complete, the channel should be closed.
runtime.Gosched()
assert.Equal(t, ChannelClosed, ch.State())
VerifyNoBlockedGoroutines(t)
}
// WithVerifiedServer runs the given test function with a server channel that is verified
// at the end to make sure there are no leaks (e.g. no exchanges leaked).
func WithVerifiedServer(t *testing.T, opts *testutils.ChannelOpts, f func(serverCh *Channel, hostPort string)) {
ch, err := testutils.NewServer(opts)
require.NoError(t, err, "NewServer failed")
f(ch, ch.PeerInfo().HostPort)
ch.Close()
// Wait till the channel is closed
for i := 0; i < 10; i++ {
if ch.State() == ChannelClosed {
break
}
runtime.Gosched()
}
// Check the message exchanges and make sure they are all empty.
if exchangesLeft := CheckEmptyExchangesConns(GetConnections(ch)); exchangesLeft != "" {
t.Errorf("Found uncleared message exchanges:\n%v", exchangesLeft)
}
}
func TestCloseSemantics(t *testing.T) {
defer testutils.SetTimeout(t, 2*time.Second)()
ctx, cancel := NewContext(time.Second)
defer cancel()
makeServer := func(name string) (*Channel, chan struct{}) {
ch, err := testutils.NewServer(&testutils.ChannelOpts{ServiceName: name})
require.NoError(t, err)
c := make(chan struct{})
registerFunc(t, ch, "stream", func(ctx context.Context, args *raw.Args) (*raw.Res, error) {
<-c
return &raw.Res{}, nil
})
registerFunc(t, ch, "call", func(ctx context.Context, args *raw.Args) (*raw.Res, error) {
return &raw.Res{}, nil
})
return ch, c
}
withNewClient := func(f func(ch *Channel)) {
ch, err := testutils.NewClient(&testutils.ChannelOpts{ServiceName: "client"})
require.NoError(t, err)
f(ch)
ch.Close()
}
call := func(from *Channel, to *Channel) error {
toPeer := to.PeerInfo()
_, _, _, err := raw.Call(ctx, from, toPeer.HostPort, toPeer.ServiceName, "call", nil, nil)
return err
}
callStream := func(from *Channel, to *Channel) <-chan struct{} {
c := make(chan struct{})
toPeer := to.PeerInfo()
call, err := from.BeginCall(ctx, toPeer.HostPort, toPeer.ServiceName, "stream", nil)
require.NoError(t, err)
require.NoError(t, NewArgWriter(call.Arg2Writer()).Write(nil), "write arg2")
require.NoError(t, NewArgWriter(call.Arg3Writer()).Write(nil), "write arg3")
go func() {
var d []byte
require.NoError(t, NewArgReader(call.Response().Arg2Reader()).Read(&d), "read arg2 from %v to %v", from.PeerInfo(), to.PeerInfo())
require.NoError(t, NewArgReader(call.Response().Arg3Reader()).Read(&d), "read arg3")
c <- struct{}{}
}()
return c
}
s1, s1C := makeServer("s1")
s2, s2C := makeServer("s2")
// Make a call from s1 -> s2, and s2 -> s1
call1 := callStream(s1, s2)
call2 := callStream(s2, s1)
// s1 and s2 are both open, so calls to it should be successful.
withNewClient(func(ch *Channel) {
require.NoError(t, call(ch, s1))
require.NoError(t, call(ch, s2))
})
require.NoError(t, call(s1, s2))
require.NoError(t, call(s2, s1))
// Close s1, should no longer be able to call it.
s1.Close()
assert.Equal(t, ChannelStartClose, s1.State())
withNewClient(func(ch *Channel) {
assert.Error(t, call(ch, s1), "closed channel should not accept incoming calls")
require.NoError(t, call(ch, s2),
"closed channel with pending incoming calls should allow outgoing calls")
})
// Even an existing connection (e.g. from s2) should fail.
assert.Equal(t, ErrChannelClosed, call(s2, s1), "closed channel should not accept incoming calls")
require.NoError(t, call(s1, s2),
"closed channel with pending incoming calls should allow outgoing calls")
// Once the incoming connection is drained, outgoing calls should fail.
s1C <- struct{}{}
<-call2
assert.Equal(t, ChannelInboundClosed, s1.State())
require.Error(t, call(s1, s2),
"closed channel with no pending incoming calls should not allow outgoing calls")
// Now the channel should be completely closed as there are no pending connections.
s2C <- struct{}{}
<-call1
assert.Equal(t, ChannelClosed, s1.State())
// Close s2 so we don't leave any goroutines running.
s2.Close()
VerifyNoBlockedGoroutines(t)
}