public function testElementOperations()
{
$buttonElement = $this->getMockBuilder('Magento\\Framework\\Data\\Form\\Element\\Button')->disableOriginalConstructor()->getMock();
$buttonElement->expects($this->any())->method('getId')->will($this->returnValue('1'));
$buttonElement->expects($this->any())->method('getName')->will($this->returnValue('Hero'));
$this->_form->addElement($buttonElement);
$this->_form->addElementToCollection($buttonElement);
$this->_form->addValues(['1', '2', '3']);
$this->_form->setValues(['4', '5', '6']);
$this->_form->addFieldNameSuffix('abc123');
$this->_form->removeField($buttonElement->getId());
$this->assertSame($this->_form->checkElementId($buttonElement->getId()), true);
}