Go Golang - pointers exercise, swap x and y

Go Golang - pointers exercise, swap x and y

package main
 
import "fmt"
 
func swap(px, py *int) {
	tempx := *px
	tempy := *py
	*px = tempy
	*py = tempx
}
func main() {
    x := int(1)
	y := int(2)
	fmt.Println("x was", x)
	fmt.Println("y was", y)
    swap(&x, &y)
	
	fmt.Println("x is now", x)
	fmt.Println("y is now", y)
}

do you know how to write test for this swap function?

hm, i've got it

package main

import (
	"testing"
)

type testpair struct {
	pairs []int
	result []int
}

func TestSwap (t *testing.T)  {
	tests := []testpair{
		{[]int{1,2}, []int{2,1}},
		{[]int{5,-1}, []int{-1,5}},
		{[]int{123,-123}, []int{-123,123}},
		{[]int{0,53535}, []int{53535,0}},
	}
	for _, tc := range tests {
		swap(&tc.pairs[0], &tc.pairs[1])
		if tc.pairs[0] != tc.result[0] || tc.pairs[1] != tc.result[1] {
			t.Error(
				"Expected",
				tc.result[0],
				tc.result[1],
				"but got",
				tc.pairs[0],
				tc.pairs[1],
				)
		}
	}
}

Approach 1: Using a temporary(temp) variable to store the value of x

package main
import "fmt"

func swap(x *int, y *int) {
	temp := *x
	*x = *y
	*y = temp
}

func main(){
	x,y := 5,10
	fmt.Println("Before SWAP: ",x,y)
	swap(&x,&y)
	fmt.Println("After SWAP:  ",x, y)
}

/*
Output:
Before SWAP:  5 10
After SWAP:   10 5
*/

Approach 2: No mediators used

package main
import "fmt"

func swap(x *int, y *int) {
	*x,*y = *y,*x
}

func main(){
	x,y := 5,10
	fmt.Println("Before SWAP: ",x,y)
	swap(&x,&y)
	fmt.Println("After SWAP:  ",x, y)
}

/*
Output:
Before SWAP:  5 10
After SWAP:   10 5
*/

Ty, bro for your useful code.
+1 STAR.