public void testAddText() throws BuildException {
    IntrospectionHelper ih = IntrospectionHelper.getHelper(java.lang.String.class);
    try {
      ih.addText("", "test");
      fail("String doesn\'t support addText");
    } catch (BuildException be) {
    }

    ih = IntrospectionHelper.getHelper(getClass());
    ih.addText(this, "test");
    try {
      ih.addText(this, "test2");
      fail("test2 shouldn\'t be equal to test");
    } catch (BuildException be) {
      assertTrue(be.getException() instanceof AssertionFailedError);
    }
  }