1 files changed, 135 insertions, 0 deletions
diff --git a/p2p/message_test.go b/p2p/message_test.go
new file mode 100644
index 000000000..9a93dd347
--- /dev/null
+++ b/p2p/message_test.go
@@ -0,0 +1,135 @@
+package p2p
+
+import (
+	"bytes"
+	"encoding/hex"
+	"fmt"
+	"io"
+	"runtime"
+	"strings"
+	"testing"
+	"time"
+)
+
+func ExampleMsgPipe() {
+	rw1, rw2 := MsgPipe()
+	go func() {
+		Send(rw1, 8, [][]byte{{0, 0}})
+		Send(rw1, 5, [][]byte{{1, 1}})
+		rw1.Close()
+	}()
+
+	for {
+		msg, err := rw2.ReadMsg()
+		if err != nil {
+			break
+		}
+		var data [][]byte
+		msg.Decode(&data)
+		fmt.Printf("msg: %d, %x\n", msg.Code, data[0])
+	}
+	// Output:
+	// msg: 8, 0000
+	// msg: 5, 0101
+}
+
+func TestMsgPipeUnblockWrite(t *testing.T) {
+loop:
+	for i := 0; i < 100; i++ {
+		rw1, rw2 := MsgPipe()
+		done := make(chan struct{})
+		go func() {
+			if err := SendItems(rw1, 1); err == nil {
+				t.Error("EncodeMsg returned nil error")
+			} else if err != ErrPipeClosed {
+				t.Error("EncodeMsg returned wrong error: got %v, want %v", err, ErrPipeClosed)
+			}
+			close(done)
+		}()
+
+		// this call should ensure that EncodeMsg is waiting to
+		// deliver sometimes. if this isn't done, Close is likely to
+		// be executed before EncodeMsg starts and then we won't test
+		// all the cases.
+		runtime.Gosched()
+
+		rw2.Close()
+		select {
+		case <-done:
+		case <-time.After(200 * time.Millisecond):
+			t.Errorf("write didn't unblock")
+			break loop
+		}
+	}
+}
+
+// This test should panic if concurrent close isn't implemented correctly.
+func TestMsgPipeConcurrentClose(t *testing.T) {
+	rw1, _ := MsgPipe()
+	for i := 0; i < 10; i++ {
+		go rw1.Close()
+	}
+}
+
+func TestEOFSignal(t *testing.T) {
+	rb := make([]byte, 10)
+
+	// empty reader
+	eof := make(chan struct{}, 1)
+	sig := &eofSignal{new(bytes.Buffer), 0, eof}
+	if n, err := sig.Read(rb); n != 0 || err != io.EOF {
+		t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
+	}
+	select {
+	case <-eof:
+	default:
+		t.Error("EOF chan not signaled")
+	}
+
+	// count before error
+	eof = make(chan struct{}, 1)
+	sig = &eofSignal{bytes.NewBufferString("aaaaaaaa"), 4, eof}
+	if n, err := sig.Read(rb); n != 4 || err != nil {
+		t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
+	}
+	select {
+	case <-eof:
+	default:
+		t.Error("EOF chan not signaled")
+	}
+
+	// error before count
+	eof = make(chan struct{}, 1)
+	sig = &eofSignal{bytes.NewBufferString("aaaa"), 999, eof}
+	if n, err := sig.Read(rb); n != 4 || err != nil {
+		t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
+	}
+	if n, err := sig.Read(rb); n != 0 || err != io.EOF {
+		t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
+	}
+	select {
+	case <-eof:
+	default:
+		t.Error("EOF chan not signaled")
+	}
+
+	// no signal if neither occurs
+	eof = make(chan struct{}, 1)
+	sig = &eofSignal{bytes.NewBufferString("aaaaaaaaaaaaaaaaaaaaa"), 999, eof}
+	if n, err := sig.Read(rb); n != 10 || err != nil {
+		t.Errorf("Read returned unexpected values: (%v, %v)", n, err)
+	}
+	select {
+	case <-eof:
+		t.Error("unexpected EOF signal")
+	default:
+	}
+}
+
+func unhex(str string) []byte {
+	b, err := hex.DecodeString(strings.Replace(str, "\n", "", -1))
+	if err != nil {
+		panic(fmt.Sprintf("invalid hex string: %q", str))
+	}
+	return b
+}