1 files changed, 133 insertions, 0 deletions
diff --git a/p2p/message_test.go b/p2p/message_test.go
new file mode 100644
index 000000000..066d2516d
--- /dev/null
+++ b/p2p/message_test.go
@@ -0,0 +1,133 @@
+package p2p
+
+import (
+	"bytes"
+	"fmt"
+	"io/ioutil"
+	"runtime"
+	"testing"
+	"time"
+
+	"github.com/ethereum/go-ethereum/ethutil"
+)
+
+func TestNewMsg(t *testing.T) {
+	msg := NewMsg(3, 1, "000")
+	if msg.Code != 3 {
+		t.Errorf("incorrect code %d, want %d", msg.Code)
+	}
+	if msg.Size != 5 {
+		t.Errorf("incorrect size %d, want %d", msg.Size, 5)
+	}
+	pl, _ := ioutil.ReadAll(msg.Payload)
+	expect := []byte{0x01, 0x83, 0x30, 0x30, 0x30}
+	if !bytes.Equal(pl, expect) {
+		t.Errorf("incorrect payload content, got %x, want %x", pl, expect)
+	}
+}
+
+func TestEncodeDecodeMsg(t *testing.T) {
+	msg := NewMsg(3, 1, "000")
+	buf := new(bytes.Buffer)
+	if err := writeMsg(buf, msg); err != nil {
+		t.Fatalf("encodeMsg error: %v", err)
+	}
+	// t.Logf("encoded: %x", buf.Bytes())
+
+	decmsg, err := readMsg(buf)
+	if err != nil {
+		t.Fatalf("readMsg error: %v", err)
+	}
+	if decmsg.Code != 3 {
+		t.Errorf("incorrect code %d, want %d", decmsg.Code, 3)
+	}
+	if decmsg.Size != 5 {
+		t.Errorf("incorrect size %d, want %d", decmsg.Size, 5)
+	}
+
+	var data struct {
+		I uint
+		S string
+	}
+	if err := decmsg.Decode(&data); err != nil {
+		t.Fatalf("Decode error: %v", err)
+	}
+	if data.I != 1 {
+		t.Errorf("incorrect data.I: got %v, expected %d", data.I, 1)
+	}
+	if data.S != "000" {
+		t.Errorf("incorrect data.S: got %q, expected %q", data.S, "000")
+	}
+}
+
+func TestDecodeRealMsg(t *testing.T) {
+	data := ethutil.Hex2Bytes("2240089100000080f87e8002b5457468657265756d282b2b292f5065657220536572766572204f6e652f76302e372e382f52656c656173652f4c696e75782f672b2bc082765fb84086dd80b7aefd6a6d2e3b93f4f300a86bfb6ef7bdc97cb03f793db6bb")
+	msg, err := readMsg(bytes.NewReader(data))
+	if err != nil {
+		t.Fatalf("unexpected error: %v", err)
+	}
+
+	if msg.Code != 0 {
+		t.Errorf("incorrect code %d, want %d", msg.Code, 0)
+	}
+}
+
+func ExampleMsgPipe() {
+	rw1, rw2 := MsgPipe()
+	go func() {
+		rw1.EncodeMsg(8, []byte{0, 0})
+		rw1.EncodeMsg(5, []byte{1, 1})
+		rw1.Close()
+	}()
+
+	for {
+		msg, err := rw2.ReadMsg()
+		if err != nil {
+			break
+		}
+		var data [1][]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 := rw1.EncodeMsg(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()
+	}
+}