test for golang stack

main.go

package main

import (
	"errors"
	"fmt"
)

func main() {
	testStack := newStack()
	testStack.push(1)
	testStack.push(2)
	testStack.push(3)
	testStack.push(4)
	fmt.Println(testStack.LinkedList)
	fmt.Println(testStack.size())
	fmt.Println(testStack.pop())
	fmt.Println(testStack.LinkedList)
	fmt.Println(testStack.size())
}

type Stack struct {
	topOfStack int
	LinkedList []int
}

func newStack() Stack {
	return Stack{
		topOfStack: 0,
		LinkedList: make([]int, 0),
	}
}
func (s Stack) size() int {
	return s.topOfStack
}
func (s *Stack) push(element int) {
	s.topOfStack += 1
	s.LinkedList = append(s.LinkedList, element)
}
func (s *Stack) pop() (int, error) {
	if s.topOfStack == 0 {
		return 0, errors.New("no elements in Stack")
	}
	s.topOfStack -= 1
	popedElement := s.LinkedList[s.topOfStack]
	s.LinkedList = s.LinkedList[:s.topOfStack]
	return popedElement, nil
}