public function testCanCalculateSurfaceAreaOfTwoDifferentShapes()
{
$square = new Square(2);
$circle = new Circle(4);
$calculator = new Calculator();
// expected value
$value = $square->area() + $circle->area();
$this->assertEquals($value, $calculator->surfaceArea(compact('square', 'circle')));
}
public function testItCanCalculateArea()
{
$circle = new Circle(0);
$this->assertEquals(0, $circle->area());
$circle = new Circle(2);
$value = pi() * 2 * 2;
$this->assertEquals($value, $circle->area());
$circle = new Circle(3.14);
$value = pi() * 3.14 * 3.14;
$this->assertEquals($value, $circle->area());
}
