initial checkin

Signed-off-by: Dr. Carsten Leue <carsten.leue@de.ibm.com>

internal/utils/utils.go

@@ -0,0 +1,28 @@
+package utils
+
+import (
+	"errors"
+	"strings"
+)
+
+var Upper = strings.ToUpper
+
+func Sum(left, right int) int {
+	return left + right
+}
+
+func Double(value int) int {
+	return value * 2
+}
+
+func Triple(value int) int {
+	return value * 3
+}
+
+func StringLen(value string) int {
+	return len(value)
+}
+
+func Error() (int, error) {
+	return 0, errors.New("some error")
+}