Add tests for Reversed util

utils/utils_test.go

@@ -0,0 +1,38 @@
+package utils
+
+import (
+	"bytes"
+	"testing"
+)
+
+func TestEmpty(t *testing.T) {
+	str := []byte{}
+
+	if !bytes.Equal(Reversed(str), []byte{}) {
+		t.Errorf("Failed on empty slice")
+	}
+}
+
+func TestSingle(t *testing.T) {
+	str := []byte{1}
+
+	if !bytes.Equal(Reversed(str), []byte{1}) {
+		t.Errorf("Failed on slice with single element")
+	}
+}
+
+func TestReverseOrder(t *testing.T) {
+	str := []byte{1, 2, 3}
+
+	if !bytes.Equal(Reversed(str), []byte{3, 2, 1}) {
+		t.Errorf("Failed on slice with single element")
+	}
+}
+
+func TestReverseUnordered(t *testing.T) {
+	str := []byte{1, 2, 1, 3, 1}
+
+	if !bytes.Equal(Reversed(str), []byte{1, 3, 1, 2, 1}) {
+		t.Errorf("Failed on slice with single element")
+	}
+}