package yamlutil

import (
	"strings"
)

// ReplacePrefixTabs will replace the leading tabs of each line with two spaces.
// Tabs are not a valid indent in yaml (wtf), but they are convenient to use in
// go when using multi-line strings.
//
// ReplacePrefixTabs should only be used within tests.
func ReplacePrefixTabs(str string) string {
	lines := strings.Split(str, "\n")
	for i := range lines {
		var n int
		for _, r := range lines[i] {
			if r == '\t' {
				n++
			} else {
				break
			}
		}

		spaces := strings.Repeat("  ", n)
		lines[i] = spaces + lines[i][n:]
	}

	return strings.Join(lines, "\n")
}