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<?php

class Rectangle
{
    protected int $width;
    protected int $height;
    
    public function setWidth(int $width): void
    {
        $this->width = $width;
    }
    
    public function setHeight(int $height): void
    {
        $this->height = $height;
    }
    
    public function calculateArea(): int
    {
        returh $this->width * $this->height;
    }
}

class Square extends Rectangle
{
    protected int $width;
    protected int $height;
    
    public function setWidth(int $width): void
    {
        $this->width = $width;
        $this->height = $width;
    }
    
    public function setHeight(int $height): void
    {
        $this->height = $height;
        $this->height = $height;
    }
    
}

class RectangleTest extends TestCase
{
    public function testCalculateArea()
    {
        // $shape = new Rectangle();
        $shape = new Square();
        
        $shape->setWidth(10);
        $shape->setHeight(2);
        
        $this->assertEquals($shape->calculateArea(), 20);
    }
}