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() { EncodeMsg(rw1, 8, []byte{0, 0}) EncodeMsg(rw1, 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 := EncodeMsg(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() } }