Golang MsgGetData.BtcDecode方法代码示例

//.........这里部分代码省略.........
			MultiInv,
			MultiInvEncoded,
			btcwire.ProtocolVersion,
		},

		// Protocol version BIP0035Version no inv vectors.
		{
			NoInv,
			NoInv,
			NoInvEncoded,
			btcwire.BIP0035Version,
		},

		// Protocol version BIP0035Version with multiple inv vectors.
		{
			MultiInv,
			MultiInv,
			MultiInvEncoded,
			btcwire.BIP0035Version,
		},

		// Protocol version BIP0031Version no inv vectors.
		{
			NoInv,
			NoInv,
			NoInvEncoded,
			btcwire.BIP0031Version,
		},

		// Protocol version BIP0031Version with multiple inv vectors.
		{
			MultiInv,
			MultiInv,
			MultiInvEncoded,
			btcwire.BIP0031Version,
		},

		// Protocol version NetAddressTimeVersion no inv vectors.
		{
			NoInv,
			NoInv,
			NoInvEncoded,
			btcwire.NetAddressTimeVersion,
		},

		// Protocol version NetAddressTimeVersion with multiple inv vectors.
		{
			MultiInv,
			MultiInv,
			MultiInvEncoded,
			btcwire.NetAddressTimeVersion,
		},

		// Protocol version MultipleAddressVersion no inv vectors.
		{
			NoInv,
			NoInv,
			NoInvEncoded,
			btcwire.MultipleAddressVersion,
		},

		// Protocol version MultipleAddressVersion with multiple inv vectors.
		{
			MultiInv,
			MultiInv,
			MultiInvEncoded,
			btcwire.MultipleAddressVersion,
		},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Encode the message to wire format.
		var buf bytes.Buffer
		err := test.in.BtcEncode(&buf, test.pver)
		if err != nil {
			t.Errorf("BtcEncode #%d error %v", i, err)
			continue
		}
		if !bytes.Equal(buf.Bytes(), test.buf) {
			t.Errorf("BtcEncode #%d\n got: %s want: %s", i,
				spew.Sdump(buf.Bytes()), spew.Sdump(test.buf))
			continue
		}

		// Decode the message from wire format.
		var msg btcwire.MsgGetData
		rbuf := bytes.NewBuffer(test.buf)
		err = msg.BtcDecode(rbuf, test.pver)
		if err != nil {
			t.Errorf("BtcDecode #%d error %v", i, err)
			continue
		}
		if !reflect.DeepEqual(&msg, test.out) {
			t.Errorf("BtcDecode #%d\n got: %s want: %s", i,
				spew.Sdump(msg), spew.Sdump(test.out))
			continue
		}
	}
}

// TestGetDataWireErrors performs negative tests against wire encode and decode
// of MsgGetData to confirm error paths work correctly.
func TestGetDataWireErrors(t *testing.T) {
	pver := btcwire.ProtocolVersion
	btcwireErr := &btcwire.MessageError{}

	// Block 203707 hash.
	hashStr := "3264bc2ac36a60840790ba1d475d01367e7c723da941069e9dc"
	blockHash, err := btcwire.NewShaHashFromStr(hashStr)
	if err != nil {
		t.Errorf("NewShaHashFromStr: %v", err)
	}

	iv := btcwire.NewInvVect(btcwire.InvVect_Block, blockHash)

	// Base message used to induce errors.
	baseGetData := btcwire.NewMsgGetData()
	baseGetData.AddInvVect(iv)
	baseGetDataEncoded := []byte{
		0x02,                   // Varint for number of inv vectors
		0x02, 0x00, 0x00, 0x00, // InvVect_Block
		0xdc, 0xe9, 0x69, 0x10, 0x94, 0xda, 0x23, 0xc7,
		0xe7, 0x67, 0x13, 0xd0, 0x75, 0xd4, 0xa1, 0x0b,
		0x79, 0x40, 0x08, 0xa6, 0x36, 0xac, 0xc2, 0x4b,
		0x26, 0x03, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, // Block 203707 hash
	}

	// Message that forces an error by having more than the max allowed inv
	// vectors.
	maxGetData := btcwire.NewMsgGetData()
	for i := 0; i < btcwire.MaxInvPerMsg; i++ {
		maxGetData.AddInvVect(iv)
	}
	maxGetData.InvList = append(maxGetData.InvList, iv)
	maxGetDataEncoded := []byte{
		0xfd, 0x51, 0xc3, // Varint for number of inv vectors (50001)
	}

	tests := []struct {
		in       *btcwire.MsgGetData // Value to encode
		buf      []byte              // Wire encoding
		pver     uint32              // Protocol version for wire encoding
		max      int                 // Max size of fixed buffer to induce errors
		writeErr error               // Expected write error
		readErr  error               // Expected read error
	}{
		// Latest protocol version with intentional read/write errors.
		// Force error in inventory vector count
		{baseGetData, baseGetDataEncoded, pver, 0, io.ErrShortWrite, io.EOF},
		// Force error in inventory list.
		{baseGetData, baseGetDataEncoded, pver, 1, io.ErrShortWrite, io.EOF},
		// Force error with greater than max inventory vectors.
		{maxGetData, maxGetDataEncoded, pver, 3, btcwireErr, btcwireErr},
	}

	t.Logf("Running %d tests", len(tests))
	for i, test := range tests {
		// Encode to wire format.
		w := newFixedWriter(test.max)
		err := test.in.BtcEncode(w, test.pver)
		if reflect.TypeOf(err) != reflect.TypeOf(test.writeErr) {
			t.Errorf("BtcEncode #%d wrong error got: %v, want: %v",
				i, err, test.writeErr)
			continue
		}

		// For errors which are not of type btcwire.MessageError, check
		// them for equality.
		if _, ok := err.(*btcwire.MessageError); !ok {
			if err != test.writeErr {
				t.Errorf("BtcEncode #%d wrong error got: %v, "+
					"want: %v", i, err, test.writeErr)
				continue
			}
		}

		// Decode from wire format.
		var msg btcwire.MsgGetData
		r := newFixedReader(test.max, test.buf)
		err = msg.BtcDecode(r, test.pver)
		if reflect.TypeOf(err) != reflect.TypeOf(test.readErr) {
			t.Errorf("BtcDecode #%d wrong error got: %v, want: %v",
				i, err, test.readErr)
			continue
		}

		// For errors which are not of type btcwire.MessageError, check
		// them for equality.
		if _, ok := err.(*btcwire.MessageError); !ok {
			if err != test.readErr {
				t.Errorf("BtcDecode #%d wrong error got: %v, "+
					"want: %v", i, err, test.readErr)
				continue
			}
		}
	}
}