@Test
public void testEscapeFileName() {

  assertThat(Util.escapeFileName("myfile.html")).isEqualTo("myfile.html");
  assertThat(Util.escapeFileName("myfile.h.html")).isEqualTo("myfile.h.html");
  assertThat(Util.escapeFileName("invalid:name.html")).isEqualTo("invalid_name.html");
  assertThat(Util.escapeFileName("name-ok.html")).isEqualTo("name-ok.html");
}