Fix character counting (#5)

Author: meowgorithm

processors/strings.go

@@ -60,7 +60,7 @@ func StringToSlug(input string) string {
 
 // CountNumberCharacters count number of Characters including spaces.
 func CountNumberCharacters(input string) string {
-	return fmt.Sprintf("%d", len(input))
+	return fmt.Sprintf("%d", len([]rune(input)))
 }
 
 // CountWords count number of words in string.

processors/strings_test.go

@@ -18,12 +18,17 @@ func TestCountNumberCharacters(t *testing.T) {
 		}, {
 			name: "Emoji",
 			args: args{input: "😃😇🙃🙂😉😌😙😗🇮🇳"},
-			want: "40",
+			want: "10",
 		}, {
 			name: "Multi line string",
 			args: args{input: "123345\nabcd\n456\n123\nabc\n567\n7890"},
 			want: "32",
 		},
+		{
+			name: "Double-byte characters",
+			args: args{input: "你好"},
+			want: "2",
+		},
 	}
 	for _, tt := range tests {
 		t.Run(tt.name, func(t *testing.T) {