adventoc/2024/puzzle_test.go

package adventoc2024

import (
	"fmt"
	"io"
	"strings"
	"testing"
)

func dup(input string) (io.Reader, io.Reader) {
	return strings.NewReader(input), strings.NewReader(input)
}

type puzzle interface {
	Part1(io.Reader) string
	Part2(io.Reader) string
}

func TestPuzzles(t *testing.T) {
	tests := []struct {
		solver puzzle
		ans1   string
		ans2   string
		inp1   string
		inp2   string
	}{

		{
			solver: Day1{},
			ans1:   "11",
			ans2:   "31",
			inp1: `3   4
4   3
2   5
1   3
3   9
3   3`,
		},
		{
			solver: Day2{},
			ans1:   "2",
			ans2:   "4",
			inp1: `7 6 4 2 1
1 2 7 8 9
9 7 6 2 1
1 3 2 4 5
8 6 4 4 1
1 3 6 7 9`,
		},
		{
			solver: Day3{},
			ans1:   "161",
			ans2:   "48",
			inp1:   "xmul(2,4)%&mul[3,7]!@^do_not_mul(5,5)+mul(32,64]then(mul(11,8)mul(8,5))",
			inp2:   "xmul(2,4)&mul[3,7]!^don't()_mul(5,5)+mul(32,64](mul(11,8)undo()?mul(8,5))",
		},

		{
			solver: Day4{},
			ans1:   "18",
			ans2:   "9",
			inp1: `MMMSXXMASM
MSAMXMSMSA
AMXSXMAAMM
MSAMASMSMX
XMASAMXAMM
XXAMMXXAMA
SMSMSASXSS
SAXAMASAAA
MAMMMXMMMM
MXMXAXMASX`,
			inp2: `.M.S......
..A..MSMS.
.M.S.MAA..
..A.ASMSM.
.M.S.M....
..........
S.S.S.S.S.
.A.A.A.A..
M.M.M.M.M.
..........`,
		},
		{
			solver: Day5{},
			ans1:   "143",
			ans2:   "123",
			inp1: `47|53
97|13
97|61
97|47
75|29
61|13
75|53
29|13
97|29
53|29
61|53
97|53
61|29
47|13
75|47
97|75
47|61
75|61
47|29
75|13
53|13

75,47,61,53,29
97,61,53,29,13
75,29,13
75,97,47,61,53
61,13,29
97,13,75,29,47`,
		},
	}

	for i, tt := range tests {
		name := fmt.Sprintf("Day%d", i+1)
		t.Run(name, func(t *testing.T) {
			p1, p2 := dup(tt.inp1)
			if tt.inp2 != "" {
				p2 = strings.NewReader(tt.inp2)
			}
			if got := tt.solver.Part1(p1); got != tt.ans1 {
				t.Errorf("Part 1 = %s; expected %s", got, tt.ans1)
			}

			if got := tt.solver.Part2(p2); got != tt.ans2 {
				t.Errorf("Part 2 = %s; expected %s", got, tt.ans2)
			}
		})
	}

}