public function dataAttributesAreRenderedCorrectly()
{
$mockTagBuilder = $this->getMockBuilder(TagBuilder::class)->setMethods(array('addAttribute'))->disableOriginalConstructor()->getMock();
$mockTagBuilder->expects($this->at(0))->method('addAttribute')->with('data-foo', 'bar');
$mockTagBuilder->expects($this->at(1))->method('addAttribute')->with('data-baz', 'foos');
$this->viewHelper->injectTagBuilder($mockTagBuilder);
$arguments = array('data' => array('foo' => 'bar', 'baz' => 'foos'));
$this->viewHelper->setArguments($arguments);
$this->viewHelper->initialize();
}