github.com/palcoin-project/palcd@v1.0.0/wire/fakemessage_test.go (about)

     1  // Copyright (c) 2013-2016 The btcsuite developers
     2  // Use of this source code is governed by an ISC
     3  // license that can be found in the LICENSE file.
     4  
     5  package wire
     6  
     7  import "io"
     8  
     9  // fakeMessage implements the Message interface and is used to force encode
    10  // errors in messages.
    11  type fakeMessage struct {
    12  	command        string
    13  	payload        []byte
    14  	forceEncodeErr bool
    15  	forceLenErr    bool
    16  }
    17  
    18  // BtcDecode doesn't do anything.  It just satisfies the wire.Message
    19  // interface.
    20  func (msg *fakeMessage) BtcDecode(r io.Reader, pver uint32, enc MessageEncoding) error {
    21  	return nil
    22  }
    23  
    24  // BtcEncode writes the payload field of the fake message or forces an error
    25  // if the forceEncodeErr flag of the fake message is set.  It also satisfies the
    26  // wire.Message interface.
    27  func (msg *fakeMessage) BtcEncode(w io.Writer, pver uint32, enc MessageEncoding) error {
    28  	if msg.forceEncodeErr {
    29  		err := &MessageError{
    30  			Func:        "fakeMessage.BtcEncode",
    31  			Description: "intentional error",
    32  		}
    33  		return err
    34  	}
    35  
    36  	_, err := w.Write(msg.payload)
    37  	return err
    38  }
    39  
    40  // Command returns the command field of the fake message and satisfies the
    41  // Message interface.
    42  func (msg *fakeMessage) Command() string {
    43  	return msg.command
    44  }
    45  
    46  // MaxPayloadLength returns the length of the payload field of fake message
    47  // or a smaller value if the forceLenErr flag of the fake message is set.  It
    48  // satisfies the Message interface.
    49  func (msg *fakeMessage) MaxPayloadLength(pver uint32) uint32 {
    50  	lenp := uint32(len(msg.payload))
    51  	if msg.forceLenErr {
    52  		return lenp - 1
    53  	}
    54  
    55  	return lenp
    56  }