go-proxy/state_stop_test.go

package proxy

import (
	"net"
	"testing"
	"time"
)

func TestProxy_Stop_Good(t *testing.T) {
	serverConn, clientConn := net.Pipe()
	defer serverConn.Close()

	miner := NewMiner(clientConn, 3333, nil)
	splitter := &stubSplitter{}
	proxyInstance := &Proxy{
		done:     make(chan struct{}),
		miners:   map[int64]*Miner{miner.ID(): miner},
		splitter: splitter,
	}

	done := make(chan error, 1)
	go func() {
		buf := make([]byte, 1)
		_, err := serverConn.Read(buf)
		done <- err
	}()

	time.Sleep(10 * time.Millisecond)
	proxyInstance.Stop()

	select {
	case err := <-done:
		if err == nil {
			t.Fatalf("expected miner connection to close during Stop")
		}
	case <-time.After(time.Second):
		t.Fatalf("expected miner connection to close during Stop")
	}
	if !splitter.disconnected {
		t.Fatalf("expected splitter to be disconnected during Stop")
	}
}

func TestProxy_Stop_Bad(t *testing.T) {
	var proxyInstance *Proxy

	proxyInstance.Stop()
}

func TestProxy_Stop_Ugly(t *testing.T) {
	serverConn, clientConn := net.Pipe()
	defer serverConn.Close()

	miner := NewMiner(clientConn, 3333, nil)
	proxyInstance := &Proxy{
		done:   make(chan struct{}),
		miners: map[int64]*Miner{miner.ID(): miner},
	}

	proxyInstance.Stop()
	proxyInstance.Stop()

	buf := make([]byte, 1)
	if _, err := serverConn.Read(buf); err == nil {
		t.Fatalf("expected closed connection after repeated Stop calls")
	}
}

func TestProxy_Stop_WaitsBeforeDisconnectingSubmitPaths(t *testing.T) {
	serverConn, clientConn := net.Pipe()
	defer serverConn.Close()

	miner := NewMiner(clientConn, 3333, nil)
	splitter := &blockingStopSplitter{disconnectedCh: make(chan struct{})}
	proxyInstance := &Proxy{
		done:     make(chan struct{}),
		miners:   map[int64]*Miner{miner.ID(): miner},
		splitter: splitter,
	}
	proxyInstance.submitCount.Store(1)

	stopped := make(chan struct{})
	go func() {
		proxyInstance.Stop()
		close(stopped)
	}()

	select {
	case <-splitter.disconnectedCh:
		t.Fatalf("expected splitter disconnect to wait for submit drain")
	case <-stopped:
		t.Fatalf("expected Stop to keep waiting while submits are in flight")
	case <-time.After(50 * time.Millisecond):
	}

	proxyInstance.submitCount.Store(0)

	select {
	case <-splitter.disconnectedCh:
	case <-time.After(time.Second):
		t.Fatalf("expected splitter disconnect after submit drain")
	}

	select {
	case <-stopped:
	case <-time.After(time.Second):
		t.Fatalf("expected Stop to finish after submit drain")
	}
}

type stubSplitter struct {
	disconnected bool
}

func (s *stubSplitter) Connect()                    {}
func (s *stubSplitter) OnLogin(event *LoginEvent)   {}
func (s *stubSplitter) OnSubmit(event *SubmitEvent) {}
func (s *stubSplitter) OnClose(event *CloseEvent)   {}
func (s *stubSplitter) Tick(ticks uint64)           {}
func (s *stubSplitter) GC()                         {}
func (s *stubSplitter) Upstreams() UpstreamStats    { return UpstreamStats{} }
func (s *stubSplitter) Disconnect()                 { s.disconnected = true }

type blockingStopSplitter struct {
	disconnectedCh chan struct{}
}

func (s *blockingStopSplitter) Connect()                    {}
func (s *blockingStopSplitter) OnLogin(event *LoginEvent)   {}
func (s *blockingStopSplitter) OnSubmit(event *SubmitEvent) {}
func (s *blockingStopSplitter) OnClose(event *CloseEvent)   {}
func (s *blockingStopSplitter) Tick(ticks uint64)           {}
func (s *blockingStopSplitter) GC()                         {}
func (s *blockingStopSplitter) Upstreams() UpstreamStats    { return UpstreamStats{} }
func (s *blockingStopSplitter) Disconnect() {
	close(s.disconnectedCh)
}