/*
NAME
  rtmp_test.go

DESCRIPTION
  See Readme.md

AUTHOR
  Saxon Nelson-Milton <saxon@ausocean.org>

LICENSE
  rtmp_test.go is Copyright (C) 2017 the Australian Ocean Lab (AusOcean)

  It is free software: you can redistribute it and/or modify them
  under the terms of the GNU General Public License as published by the
  Free Software Foundation, either version 3 of the License, or (at your
  option) any later version.

  It 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 General Public License
  for more details.

  You should have received a copy of the GNU General Public License
  along with revid in gpl.txt.  If not, see http://www.gnu.org/licenses.
*/

package rtmp

import (
  "testing"
  "unsafe"
)

const (
  arrStart  = 0
  arrEnd    = 5
  arrSize   = 6
  inc       = 3
  dec       = 3
)

var (
  byteArr   = [arrSize]byte{0x01,0x02,0x03,0x04,0x05,0x06}
  int32Arr  = [arrSize]int32{1,2,3,4,5,6}
  int64Arr  = [arrSize]int64{1,2,3,4,5,6}
  errMsg    = "Obtained: %v, but wanted: %v"
)

func TestIncPtr(t *testing.T){
  // Test how it deals with bytes
  bytePtr := unsafe.Pointer(&byteArr[arrStart])
  valueByte := *(*byte)(incPtr(bytePtr,inc,byteSize))
  if valueByte != byteArr[inc]  {
    t.Errorf(errMsg,valueByte,byteArr[inc])
  }

  // Test how it deals with int32s
  int32Ptr := unsafe.Pointer(&int32Arr[arrStart])
  valueInt32 := *(*int32)(incPtr(int32Ptr,inc,int32Size))
  if valueInt32 != int32Arr[inc] {
    t.Errorf(errMsg,valueInt32,int32Arr[inc])
  }

  // Test how it deals with int64
  int64Ptr := unsafe.Pointer(&int64Arr[arrStart])
  valueInt64 := *(*int64)(incPtr(int64Ptr,inc,int64Size))
  if valueInt64 != int64Arr[inc] {
    t.Errorf(errMsg,valueInt64,int64Arr[inc])
  }
}

func TestDecPtr(t *testing.T){
  // Test how it deals with bytes
  bytePtr := unsafe.Pointer(&byteArr[arrEnd ])
  valueByte := *(*byte)(decPtr(bytePtr,dec,byteSize))
  if valueByte != byteArr[arrEnd-dec]  {
    t.Errorf(errMsg,valueByte,byteArr[inc])
  }

  // Test how it deals with ints
  int32Ptr := unsafe.Pointer(&int32Arr[arrEnd])
  valueInt32 := *(*int32)(decPtr(int32Ptr,dec,int32Size))
  if valueInt32 != int32Arr[arrEnd-inc] {
    t.Errorf(errMsg,valueInt32,int32Arr[inc])
  }

  // Test how it deals with int64
  int64Ptr := unsafe.Pointer(&int64Arr[arrEnd])
  valueInt64 := *(*int64)(decPtr(int64Ptr,dec,int64Size))
  if valueInt64 != int64Arr[arrEnd-dec] {
    t.Errorf(errMsg,valueInt64,int64Arr[inc])
  }
}

func TestIndxBytePtr(t *testing.T) {
  // Test how it deals with bytes
  bytePtr := unsafe.Pointer(&byteArr[arrStart])
  valueByte := indxBytePtr(bytePtr,inc)
  if valueByte != byteArr[inc]  {
    t.Errorf(errMsg,valueByte,byteArr[inc])
  }
}

func TestIndxInt32Ptr(t *testing.T) {
  // Test how it deals with int32s
  int32Ptr := unsafe.Pointer(&int32Arr[arrStart])
  valueInt32 := indxInt32Ptr(int32Ptr,inc)
  if valueInt32 != int32Arr[inc] {
    t.Errorf(errMsg,valueInt32,int32Arr[inc])
  }
}

func TestIndxInt64Ptr(t *testing.T) {
  // Test how it deals with int64
  int64Ptr := unsafe.Pointer(&int64Arr[arrStart])
  valueInt64 := indxInt64Ptr(int64Ptr,inc)
  if valueInt64 != int64Arr[inc] {
    t.Errorf(errMsg,valueInt64,int64Arr[inc])
  }
}

/*
func TestPtrToSlice(t *testing.T){
}
*/