feat(test): add unit test

pkg/util/runes/rune_test.go

@@ -0,0 +1,28 @@
+package runes
+
+import (
+	"reflect"
+	"testing"
+)
+
+import (
+	"github.com/stretchr/testify/assert"
+)
+
+func TestConvertToRune(t *testing.T) {
+	tests := []struct {
+		input  interface{}
+		output []rune
+	}{
+		{123, []rune("123")},
+		{"hello", []rune("hello")},
+		{true, []rune("true")},
+		{nil, []rune("<nil>")},
+		{struct{ name string }{name: "John"}, []rune("{John}")},
+	}
+
+	for _, test := range tests {
+		result := ConvertToRune(test.input)
+		assert.True(t, reflect.DeepEqual(result, test.output))
+	}
+}