  @Test
  public void testIntegration_TestIssue_appendChars1() throws Throwable {

    final JSEProviderImpl provider = new JSEProviderImpl(this);
    final JJJVMClass testKlazz = loadClassFromClassPath(provider, "com/igormaznitsa/jjjvm/testclasses/TestIssue");
    final JJJVMMethod append = testKlazz.findMethod("trampoline", "()Ljava/lang/String;");
    String res = (String) append.invoke(null, new Object[]{});
    String expected = new StringBuilder().append((char) ('a' ^ 'b')).toString();
    assertEquals(expected, res);
  }