package main

import (
	"strconv"
	"testing"

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

func Test_digits_number(t *testing.T) {
	tests := []struct {
		n uint
		d []uint8
	}{
		{n: 0, d: []uint8{0}},
		{n: 1234, d: []uint8{4, 3, 2, 1}},
		{n: 12345, d: []uint8{5, 4, 3, 2, 1}},
	}
	for _, tt := range tests {
		name := strconv.FormatUint(uint64(tt.n), 10)
		t.Run(name, func(t *testing.T) {
			t.Run("digits", func(t *testing.T) {
				assert.Equal(t, tt.d, digits(tt.n))
			})
			t.Run("number", func(t *testing.T) {
				assert.Equal(t, tt.n, number(tt.d))
			})
		})
	}
}