There's no data providers in phpspec (at least not yet). You have to do something like:
public function it_should_return_sum_of_numbers_passed()
{
$examples = array(
array(1, 2, 3),
array(-1, 1, 0),
array(-1, -2, -3)
);
foreach ($examples as $example) {
$number1 = $example[0];
$number2 = $example[1];
$expectedResult = $example[2];
$this->add($number1, $number2)->shouldReturn($expectedResult);
}
}