public function testAdd()
{
$maths = new maths();
$this->assertEquals(3, $maths->add(1, 2));
$this->assertEquals(2, $maths->add(0, 2));
$this->assertEquals(-2, $maths->add(0, -2));
}
class maths extends whatever
{
private $number;
public function setInitialNumber($number)
{
$this->number = $number;
}
public function add($num)
{
$this->number += $num;
}
public function subtract($num)
{
$this->number -= $num;
}
public function multiply($num)
{
$this->number *= $num;
}
public function getFinalNumber()
{
return $this->number;
}
}
$m = new maths();
$m->setInitialNumber(5);
$m->add(4);
$m->subtract(1);
$m->multiply(2);
$m->add(2);
echo $m->getFinalNumber();