Ejercicio PHP figuras

figuras.php

<?php

require_once 'figuras.php';

class FigurasTest extends PHPUnit_Framework_TestCase
{

    function test_create_class() {
        $f = new Rect(1,2,3,4);
        $this->assertTrue(is_a($f, 'Rect'));
    }
    // ...
    function test_pos() {
        $rect = new Rect(1,2,3,4);
        $this->assertEquals([1,2],$rect->pos());
    }

    // ...
    function test_area_rect() {
        $rect = new Rect(1,2,3,4);
        $this->assertEquals(12,$rect->area());
    }

    // ...
    function test_area_circulo() {
        $circ = new Circulo(1,2,3);
        $this->assertEquals(28.27,$circ->area(),'',0.1);
    }

    // ...
    function test_mover_circulo() {
        $circ = new Circulo(1,2,3);
        $circ->mover(3,2);
        $this->assertEquals([4,4],$circ->pos());
    }

    function test_suma_areas() {
        $figuras = [ new Rect(1,2,3,4),
                     new Circulo(0,0,3),
                     new Rect(2,2,4,4)] ;

        $this->assertEquals(56.27,areaFiguras($figuras),'',0.1);
    }
}