public function testElementIsNotValid()
{
$node = new NodeElement('some xpath', $this->session);
$this->driver->expects($this->exactly(2))->method('find')->with('some xpath')->will($this->onConsecutiveCalls(array(), array('xpath1', 'xpath2')));
$this->assertFalse($node->isValid(), 'no elements found is invalid element');
$this->assertFalse($node->isValid(), 'more then 1 element found is invalid element');
}
