Cracking the Coding Interview: URLIfy (unsolved)

Cracking the Coding Interview: URLIfy (unsolved)

package main

import "fmt"

/**
	URLIfy: Write a method to replace all spaces in a string with '%20'. You may assume that the string
	has sufficient space at the end to hold the additional characters, and that you are given the "true" length
	of the string.
 */

func main() {
	cases := []*testCase{
		{
			input:    "",
			len:      0,
			expected: "",
		},
		{
			input: "Hello World  ",
			len: 11,
			expected: "Hello%20World",
		},
		{
			input: "Mr John Smith    ",
			len:   13,
			expected: "Mr%20John%20Smith",
		},
	}

	for _, c := range cases {
		mutatedCopy := []rune(c.input)
		URLify(mutatedCopy, c.len)
		if string(mutatedCopy) != c.expected {
			fmt.Printf("Failed:\n\tExpected %s\n\tActual: '%s'\n", c, string(mutatedCopy))
		} else {
			fmt.Printf("Passed!\n\t%s\n", c)
		}

	}
}

type testCase struct {
	input string
	len int
	expected string
}

func (tc *testCase) String() string {
	return fmt.Sprintf("URLify('%s', %d)='%s'", tc.input, tc.len, tc.expected)
}

func URLify(input []rune, l int) {
	// TODO
}