subsets_test.go

package problem0078

import (
	"fmt"
	"sort"
	"testing"

	"github.com/stretchr/testify/assert"
)

type question struct {
	para
	ans
}

// para 是参数
type para struct {
	nums []int
}

// ans 是答案
type ans struct {
	one [][]int
}

func Test_Problem0078(t *testing.T) {
	ast := assert.New(t)

	qs := []question{

		question{
			para{
				[]int{1, 2, 3},
			},
			ans{[][]int{
				nil,
				[]int{1},
				[]int{2},
				[]int{3},
				[]int{1, 2},
				[]int{1, 3},
				[]int{2, 3},
				[]int{1, 2, 3},
			}},
		},

		question{
			para{
				[]int{9, 0, 3, 5, 7},
			},
			ans{[][]int{
				nil,
				[]int{0},
				[]int{3},
				[]int{5},
				[]int{7},
				[]int{9},
				[]int{0, 3},
				[]int{0, 5},
				[]int{0, 7},
				[]int{0, 9},
				[]int{3, 5},
				[]int{3, 7},
				[]int{3, 9},
				[]int{5, 7},
				[]int{5, 9},
				[]int{7, 9},
				[]int{0, 3, 5},
				[]int{0, 3, 7},
				[]int{0, 3, 9},
				[]int{0, 5, 7},
				[]int{0, 5, 9},
				[]int{0, 7, 9},
				[]int{3, 5, 7},
				[]int{3, 5, 9},
				[]int{3, 7, 9},
				[]int{5, 7, 9},
				[]int{0, 3, 5, 7},
				[]int{0, 3, 5, 9},
				[]int{0, 3, 7, 9},
				[]int{0, 5, 7, 9},
				[]int{3, 5, 7, 9},
				[]int{0, 3, 5, 7, 9},
			}},
		},

		// 如需多个测试，可以复制上方元素。
	}

	for _, q := range qs {
		a, p := q.ans, q.para
		fmt.Printf("~~%v~~\n", p)
		sorted(a.one)
		ans := subsets(p.nums)
		sorted(ans)
		ast.Equal(a.one, ans, "输入:%v", p)
	}
}

func sorted(iss [][]int) {
	for i := range iss {
		sort.Ints(iss[i])
	}
	sort.Slice(iss, func(i int, j int) bool {
		if len(iss[i]) == len(iss[j]) {
			for k := range iss[i] {
				if iss[i][k] > iss[j][k] {
					return false
				}
				if iss[i][k] < iss[j][k] {
					return true
				}
			}
		}
		return len(iss[i]) < len(iss[j])
	})

}

func Benchmark_subsets(b *testing.B) {
	for i := 1; i < b.N; i++ {
		subsets([]int{0, 1, 2, 3, 4, 5, 6, 7, 8, 9})
	}
}