public function testFitsInto()
 {
     $box = new Size(800, 600);
     $fits = $box->fitsInto(new Size(100, 100));
     $this->assertFalse($fits);
     $box = new Size(800, 600);
     $fits = $box->fitsInto(new Size(1000, 100));
     $this->assertFalse($fits);
     $box = new Size(800, 600);
     $fits = $box->fitsInto(new Size(100, 1000));
     $this->assertFalse($fits);
     $box = new Size(800, 600);
     $fits = $box->fitsInto(new Size(800, 600));
     $this->assertTrue($fits);
     $box = new Size(800, 600);
     $fits = $box->fitsInto(new Size(1000, 1000));
     $this->assertTrue($fits);
     $box = new Size(100, 100);
     $fits = $box->fitsInto(new Size(800, 600));
     $this->assertTrue($fits);
     $box = new Size(100, 100);
     $fits = $box->fitsInto(new Size(80, 60));
     $this->assertFalse($fits);
 }