@Test
public void testClone() throws Exception {

  final File vert = temporaryFolder.newFile("a.vert");
  FileUtils.writeStringToFile(vert, "void main() { }", StandardCharsets.UTF_8);
  final TranslationUnit vertTu = ParseHelper.parse(vert);
  assertEquals(ShaderKind.VERTEX, vertTu.getShaderKind());
  assertEquals(ShaderKind.VERTEX, vertTu.clone().getShaderKind());
}