/**
  * @depends	testInterface
  * @return	null
  */
 public function testIsCssEnableDisableCss()
 {
     $this->assertTrue($this->htmlDoc->isCssEnabled());
     $this->assertSame($this->htmlDoc, $this->htmlDoc->disableCss());
     $this->assertFalse($this->htmlDoc->isCssEnabled());
     $this->assertSame($this->htmlDoc, $this->htmlDoc->enableCss());
     $this->assertTrue($this->htmlDoc->isCssEnabled());
 }