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package ctxio_test
import (
"bufio"
"bytes"
"context"
"net"
"sync"
"testing"
"time"
"github.com/varlink/go/varlink/internal/ctxio"
)
func TestConn(t *testing.T) {
l, err := net.Listen("tcp", ":")
if err != nil {
t.Fatalf("Unexpected error creating a listener: %v", err)
}
wg := &sync.WaitGroup{}
wg.Add(1)
go func() {
defer wg.Done()
c, err := l.Accept()
if err != nil {
return
}
rd := bufio.NewReader(c)
req, err := rd.ReadBytes('\n')
if err != nil {
t.Errorf("Failed to execute readFunc: %v", err)
return
}
_, err = c.Write(append([]byte("Request received: "), req...))
if err != nil {
t.Errorf("Failed to execute writeFunc: %v", err)
return
}
}()
c, err := net.Dial("tcp", l.Addr().String())
if err != nil {
t.Fatalf("Failed to dial server: %v", err)
}
ctxC := ctxio.NewConn(c)
_, err = ctxC.Write(context.Background(), []byte("hello world\n"))
if err != nil {
t.Fatalf("Failed to write request: %v", err)
}
ret, err := ctxC.ReadBytes(context.Background(), '\n')
if err != nil {
t.Fatalf("Failed to read reply: %v", err)
}
want := []byte("Request received: hello world\n")
if !bytes.Equal(ret, want) {
t.Fatalf("Unexpected response: wanted %q, got %q", string(want), string(ret))
}
err = ctxC.Close()
if err != nil {
t.Fatalf("Failed to close ctx connection: %v", err)
}
err = l.Close()
if err != nil {
t.Fatalf("Failed to close listener: %v", err)
}
wg.Wait()
}
func TestBlockingWrite(t *testing.T) {
cl, _ := net.Pipe()
ctxC := ctxio.NewConn(cl)
ctx, cancel := context.WithCancel(context.Background())
go func() {
time.Sleep(time.Millisecond)
cancel()
}()
_, err := ctxC.Write(ctx, []byte("hello world\n"))
if err == nil {
t.Fatal("Unexpectedly did not error")
}
if err != context.Canceled {
t.Fatalf("Got unexpected error: %T, %s", err, err)
}
}
func TestBlockingRead(t *testing.T) {
cl, _ := net.Pipe()
ctxC := ctxio.NewConn(cl)
ctx, cancel := context.WithCancel(context.Background())
go func() {
time.Sleep(time.Millisecond)
cancel()
}()
_, err := ctxC.ReadBytes(ctx, '\n')
if err == nil {
t.Fatal("Unexpectedly did not error")
}
if err != context.Canceled {
t.Fatalf("Got unexpected error: %T, %s", err, err)
}
}
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