Merge pull request #68 from gobuffalo/bugfix-titlerize-unicode

fixed incorrect titleizing of unicode string

go.mod

@@ -5,3 +5,5 @@ go 1.16
 exclude github.com/stretchr/testify v1.7.1
 
 require github.com/stretchr/testify v1.8.1
+
+retract [v1.0.0, v1.0.1]

humanize_test.go

@@ -20,6 +20,7 @@ func Test_Humanize(t *testing.T) {
 		{"first_name", "First name"},
 		{"first_Name", "First Name"},
 		{"firstName", "First Name"},
+		{"óbito", "Óbito"},
 	}
 
 	for _, tt := range table {

titleize.go

@@ -19,12 +19,20 @@ func Titleize(s string) string {
 //	"This is `code` ok" = "This Is `code` OK"
 func (i Ident) Titleize() Ident {
 	var parts []string
+
+	// TODO: we need to reconsider the design.
+	//       this approach preserves inline code block as is but it also
+	//       preserves the other words start with a special character.
+	//       I would prefer: "*wonderful* world" to be "*Wonderful* World"
 	for _, part := range i.Parts {
-		x := string(unicode.ToTitle(rune(part[0])))
-		if len(part) > 1 {
-			x += part[1:]
+		// CAUTION: in unicode, []rune(str)[0] is not rune(str[0])
+		runes := []rune(part)
+		x := string(unicode.ToTitle(runes[0]))
+		if len(runes) > 1 {
+			x += string(runes[1:])
 		}
 		parts = append(parts, x)
 	}
+
 	return New(strings.Join(parts, " "))
 }

titleize_test.go

@@ -12,11 +12,13 @@ func Test_Titleize(t *testing.T) {
 		{"bob dylan", "Bob Dylan"},
 		{"Nice to see you!", "Nice To See You!"},
 		{"*hello*", "*hello*"},
+		{"hello *wonderful* world!", "Hello *wonderful* World!"}, // CHKME
 		{"i've read a book! have you?", "I've Read A Book! Have You?"},
 		{"This is `code` ok", "This Is `code` OK"},
 		{"foo_bar", "Foo Bar"},
 		{"admin/widget", "Admin Widget"},
 		{"widget", "Widget"},
+		{"óbito", "Óbito"},
 	}
 
 	for _, tt := range table {