You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: 28. Find the Index of the First Occurrence in a String_test.go
    path of file: ./repos/LeetCode-Go/leetcode/0028.Find-the-Index-of-the-First-Occurrence-in-a-String
    
    the code of the file until where you have to start completion: package leetcode

import (
	"fmt"
	"testing"
)

type question28 struct {
	para28
	ans28
}

// para 是参数
// one 代表第一个参数
type para28 struct {
	s string
	p string
}

// ans 是答案
// one 代表第一个答案
type ans28 struct {
	one int
}

func Test_Problem28(t *testing.T) {

	qs := []question28{

		{
			para28{"abab", "ab"},
	
    
func Test_Problem28(t *testing.T) {

	qs := []question28{

		{
			para28{"abab", "ab"},
			ans28{0},
		},

		{
			para28{"hello", "ll"},
			ans28{2},
		},

		{
			para28{"", "abc"},
			ans28{0},
		},

		{
			para28{"abacbabc", "abc"},
			ans28{5},
		},

		{
			para28{"abacbabc", "abcd"},
			ans28{-1},
		},

		{
			para28{"abacbabc", ""},
			ans28{0},
		},
	}

	fmt.Printf("------------------------Leetcode Problem 28------------------------\n")

	for _, q := range qs {
		_, p := q.ans28, q.para28
		fmt.Printf("【input】:%v       【output】:%v\n", p, strStr(p.s, p.p))
	}
	fmt.Printf("\n\n\n")
}