TUN-528: Move cloudflared into a separate repo

vendor/zombiezen.com/go/capnproto2/rpc/cancel_test.go

@@ -0,0 +1,52 @@
+package rpc_test
+
+import (
+	"testing"
+
+	"golang.org/x/net/context"
+	"zombiezen.com/go/capnproto2/rpc"
+	"zombiezen.com/go/capnproto2/rpc/internal/logtransport"
+	"zombiezen.com/go/capnproto2/rpc/internal/pipetransport"
+	"zombiezen.com/go/capnproto2/rpc/internal/testcapnp"
+	"zombiezen.com/go/capnproto2/server"
+)
+
+func TestCancel(t *testing.T) {
+	ctx, cancel := context.WithCancel(context.Background())
+	defer cancel()
+	log := testLogger{t}
+	p, q := pipetransport.New()
+	if *logMessages {
+		p = logtransport.New(nil, p)
+	}
+	c := rpc.NewConn(p, rpc.ConnLog(log))
+	notify := make(chan struct{})
+	hanger := testcapnp.Hanger_ServerToClient(Hanger{notify: notify})
+	d := rpc.NewConn(q, rpc.MainInterface(hanger.Client), rpc.ConnLog(log))
+	defer d.Wait()
+	defer c.Close()
+	client := testcapnp.Hanger{Client: c.Bootstrap(ctx)}
+
+	subctx, subcancel := context.WithCancel(ctx)
+	promise := client.Hang(subctx, nil)
+	<-notify
+	subcancel()
+	_, err := promise.Struct()
+	<-notify // test will deadlock if cancel not delivered
+
+	if err != context.Canceled {
+		t.Errorf("promise.Get() error: %v; want %v", err, context.Canceled)
+	}
+}
+
+type Hanger struct {
+	notify chan struct{}
+}
+
+func (h Hanger) Hang(call testcapnp.Hanger_hang) error {
+	server.Ack(call.Options)
+	h.notify <- struct{}{}
+	<-call.Ctx.Done()
+	close(h.notify)
+	return nil
+}