mockconn.go

// Copyright 2022 DomesticMoth
//
// This file is part of Ytl.
//
// Ytl is free software; you can redistribute it and/or
// modify it under the terms of the GNU Lesser General Public
// License as published by the Free Software Foundation; either
// version 3 of the License, or (at your option) any later version.
//
// Ytl is distributed in the hope that it will be useful,
// but WITHOUT ANY WARRANTY; without even the implied warranty of
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
// Lesser General Public License for more details.
//
// You should have received a copy of the GNU Lesser General Public License
// along with this program; if not, write to the Free Software Foundation,
// Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.

// Package debugstuff implements mock structs & functions
// using in unit tests in whole project
package debugstuff

import (
	"crypto/ed25519"
	"net"
)

// Return valid ygg pub key for debug usage
func MockPubKey() []byte {
	buf := MockConnContent()
	metaPkgSize := 38
	return buf[metaPkgSize-ed25519.PublicKeySize : metaPkgSize]
}

// Return valid handshake pkg & some pseudo payload data for debug usage
func MockConnContent() []byte {
	return []byte{
		109, 101, 116, 97, // 'm' 'e' 't' 'a'
		0, 4, // Version
		// PublicKey
		194, 220, 146, 21, 237, 163, 168, 31,
		216, 91, 173, 6, 46, 225, 161, 231,
		146, 238, 83, 130, 131, 95, 151, 141,
		143, 73, 142, 61, 27, 142, 160, 212,
		// Some pseudo payload
		0, 1, 0, 1, 0, 1,
		2, 3, 2, 3, 2, 3,
		4, 5, 4, 5, 4, 5,
		6, 7, 6, 7, 6, 7,
		8, 9, 8, 9, 8, 9,
		0, 1, 0, 1, 0, 1,
		2, 3, 2, 3, 2, 3,
		4, 5, 4, 5, 4, 5,
		6, 7, 6, 7, 6, 7,
		8, 9, 8, 9, 8, 9,
	}
}

// Return connection from witch valid handshake pkg
// & some pseudo payload data can be readed
func MockConn() net.Conn {
	a, b := net.Pipe()
	go func() {
		buf := make([]byte, 1)
		b.Write(MockConnContent())
		for {
			_, err := b.Read(buf)
			if err != nil {
				break
			}
		}
		b.Close()
	}()
	return a
}

// Return valid handshake pkg & some pseudo payload data
// but proto version is too hight
func MockConnWrongVerContent() []byte {
	return []byte{
		109, 101, 116, 97, // 'm' 'e' 't' 'a'
		1, 5, // Version
		// PublicKey
		194, 220, 146, 21, 237, 163, 168, 31,
		216, 91, 173, 6, 46, 225, 161, 231,
		146, 238, 83, 130, 131, 95, 151, 141,
		143, 73, 142, 61, 27, 142, 160, 212,
		// Some pseudo payload
		0, 1, 0, 1, 0, 1,
		2, 3, 2, 3, 2, 3,
		4, 5, 4, 5, 4, 5,
		6, 7, 6, 7, 6, 7,
		8, 9, 8, 9, 8, 9,
		0, 1, 0, 1, 0, 1,
		2, 3, 2, 3, 2, 3,
		4, 5, 4, 5, 4, 5,
		6, 7, 6, 7, 6, 7,
		8, 9, 8, 9, 8, 9,
	}
}

// Guess what by name
func MockWrongVerConn() net.Conn {
	a, b := net.Pipe()
	go func() {
		buf := make([]byte, 1)
		b.Write(MockConnWrongVerContent())
		for {
			_, err := b.Read(buf)
			if err != nil {
				break
			}
		}
		b.Close()
	}()
	return a
}

// Returns an incorrect cropped ygg handshake pkg
func MockConnTooShortContent() []byte {
	return []byte{
		109, 101, 116, 97, // 'm' 'e' 't' 'a'
		1, 5, // Version
		// PublicKey
		194, 220, 146, 21, 237, 163, 168, 31,
		216, 91, 173, 6, 46, 225, 161, 231,
		146, 238, 83,
	}
}

// Guess what by name
func MockTooShortConn() net.Conn {
	a, b := net.Pipe()
	go func() {
		buf := make([]byte, 1)
		b.Write(MockConnTooShortContent())
		for {
			_, err := b.Read(buf)
			if err != nil {
				break
			}
		}
		b.Close()
	}()
	return a
}