SEBA-688 add additional unit tests

Change-Id: I361bc872af08b97bccb29f17838940205fed48e9
diff --git a/testutils/testutils.go b/testutils/testutils.go
index 64fdbcb..2f80f79 100644
--- a/testutils/testutils.go
+++ b/testutils/testutils.go
@@ -131,3 +131,11 @@
 	}
 	return nil
 }
+
+func AssertStringEqual(t *testing.T, actual string, expected string) error {
+	if actual != expected {
+		t.Errorf("Expected string '%s' but received actual string '%s'", expected, actual)
+		return errors.New("AssertStringEqual")
+	}
+	return nil
+}