Solution to Cassidoo 21 Nov 2022

main.go

package main

import (
	"fmt"
	"os"
	"strings"
)

func main() {
	in := os.Args[1]
	formatted := format(in)
	fmt.Print(formatted)
}

func format(slashes string) string {
	formatted := ""

	indent := 0
	for _, slash := range slashes {
		if slash == '/' {
			if indent > 0 {
				indent--
			}
		}
		formatted += fmt.Sprintf("%s%c\n", strings.Repeat(" ", indent), slash)
		if slash == '\\' {
			indent++
		}
	}

	return formatted
}

main_test.go

package main

import "testing"

func TestFormat(t *testing.T) {
	cases := []struct {
		in       string
		expected string
	}{
		{
			in:       `\\\//\/\\`,
			expected: "\\\n \\\n  \\\n  /\n /\n \\\n /\n \\\n  \\\n",
		},
		{
			in:       `\\\\`,
			expected: "\\\n \\\n  \\\n   \\\n",
		},
	}

	for _, tc := range cases {
		t.Run(tc.in, func(t *testing.T) {
			actual := format(tc.in)
			if tc.expected != actual {
				t.Fail()
			}
		})
	}
}