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: sort_test.go
    path of file: ./repos/lancet/algorithm
    
    the code of the file until where you have to start completion: package algorithm

import (
	"fmt"
	"testing"

	"github.com/duke-git/lancet/v2/internal"
)

// People test mock data
type people struct {
	Name string
	Age  int
}

// PeopleAageComparator sort pe
    
func TestShellSort(t *testing.T) {
	t.Parallel()
	asssert := internal.NewAssert(t, "TestShellSort")

	peoples := []people{
		{Name: "a", Age: 20},
		{Name: "b", Age: 10},
		{Name: "c", Age: 17},
		{Name: "d", Age: 8},
		{Name: "e", Age: 28},
	}
	comparator := &peopleAgeComparator{}
	ShellSort(peoples, comparator)

	expected := "[{d 8} {b 10} {c 17} {a 20} {e 28}]"
	actual := fmt.Sprintf("%v", peoples)

	asssert.Equal(expected, actual)
}