Added tests and changed CHANGELOG

Author: g41797

CHANGELOG.md

@@ -4,7 +4,12 @@ All notable changes to **ValueStringBuilder** will be documented in this file. T
 
 <!-- The format is based on [Keep a Changelog](https://keepachangelog.com/en/1.0.0/) -->
 
-## [Unreleased]
+## [Unreleased] - 2023-10-19
+
+### Added
+
+-   `SetRuneAt` is added to the string builder
+-   `Skip` is added to the string builder
 
 ## [0.10.0] - 2023-08-31
 

stringbuilder.go

@@ -337,11 +337,6 @@ func createTrimSet(chars ...rune) map[rune]bool {
 	return trimSet
 }
 
-// Set initial position
-func (s *StringBuilder) Rewind() {
-	s.position = 0
-}
-
 // Sets the rune at the specific position
 func (s *StringBuilder) SetRuneAt(index int, val rune) error {
 	if index < 0 {

stringbuilder_test.go

@@ -493,3 +493,41 @@ func slicesEqual(a []int, b []int) bool {
 
 	return true
 }
+
+func TestSetRuneAt(t *testing.T) {
+	sb := NewStringBuilderFromString("Hello")
+
+	err := sb.SetRuneAt(10, 'a')
+	if err == nil {
+		t.Errorf("Should throw error but did not")
+	}
+
+	err = sb.SetRuneAt(0, 'a')
+	if err != nil {
+		t.Errorf("Should not throw error")
+	}
+
+	if result := sb.RuneAt(0); result != 'a' {
+		t.Errorf("Actual %q, Expected: %q", result, 'e')
+	}
+}
+
+func TestSkip(t *testing.T) {
+	sb := NewStringBuilderFromString("Hello")
+
+	err := sb.Skip(1)
+	if err == nil {
+		t.Errorf("Should throw error but did not")
+	}
+
+	sb.Clear()
+
+	err = sb.Skip(1)
+	if err != nil {
+		t.Errorf("Should not throw error")
+	}
+
+	if sb.position != 1 {
+		t.Errorf("Actual position %d, Expected: 1", sb.position)
+	}
+}