@Test
  public void executeWithoutPageHeader() throws IOException, ServletException {
    final KeywordsGroup keywordsGroup = TestUtil.createKeywordsGroup();
    keywordsGroup.setName("g");
    keywordsGroup.setValue("a,a1");

    pageVersion.addKeywordsGroup(keywordsGroup);

    render.execute(null, stringBuilder);

    Assert.assertEquals("", stringBuilder.toString());
  }
  @Test
  public void executeWithSite() throws IOException, ServletException {
    final KeywordsGroup keywordsGroup = TestUtil.createKeywordsGroup();
    keywordsGroup.setName("g");
    keywordsGroup.setValue("a,a1");

    pageVersion.addKeywordsGroup(keywordsGroup);

    stringBuilder.append("<!-- PAGE_HEADER -->");
    render.execute(null, stringBuilder);

    Assert.assertEquals(
        "<meta name=\"keywords\" content=\"a,a1\">\n" + "<!-- PAGE_HEADER -->",
        stringBuilder.toString());
  }