@Test
public void removingUnsupportedCharacters() {

    PDDocument doc = new PDDocument();
    String str = FontUtils.removeUnsupportedCharacters("ͷ͵ͲͲͲ Text here SǦͳͻǦʹͳͲͻ4 and here", doc);
    assertThat(str, is("͵ Text here SǦͻǦʹͻ4 and here"));
}